Excellent Absorption Capacity Research Articles

A biocompatible nano-barium sulfonate system for quad-modal imaging-guided photothermal radiotherapy of tumors.

Integration of multi-modal imaging techniques and various cancer treatments based on their respective characteristics would be beneficial for enhancing anticancer efficacy. Exploiting an "all-in-one" nanoparticle with high biocompatibility has attracted widespread attention. Herein, two clinically proven modalities, human serum albumin (HSA) and indocyanine green (ICG), were selected to create HSA-stable barium sulfonate nanoparticles (HSA@ICG-Ba) through the reaction of a sulfonic acid group with barium ions. Our nano-probe showed excellent optical properties and X-ray absorption capacity, which can be applied in tumor theranostics. Utilizing the rich tumor accumulation of HSA@ICG-Ba, this nanoparticle can obtain multifaceted tumor information through fluorescence (FL), computerized tomography (CT), photoacoustic (PA) imaging, and single photon emission computed tomography (SPECT) imaging. Additionally, radiation sensitization therapy and photothermal therapy based on HSA@ICG-Ba were evaluated using both in vitro and in vivo models. The efficacy of tumor radiotherapy can be further improved by mild hyperthermia owing to the relieved tumor hypoxia. Finally, the favorable safety profile of HSA@ICG-Ba is confirmed by blood index analysis and tissue section observation. Therefore, this study explored an "all-in-one" barium sulfonate nanoparticle with high biocompatibility for FL/CT/PA/SPECT imaging-guided synergetic photothermal-radiotherapy of tumors, providing a new approach and potential pathway for tumor theranostics.

Hierarchical dandelion-like CoS2 hollow microspheres: self-assembly and controllable microwave absorption performance.

The emerging electromagnetic radiation and interference problems have promoted the rapid development of microwave absorption materials (MAMs). However, it remains a severe challenge to construct high-performance microwave absorption materials with broadband, lightweight and corrosion resistance within low filling contents. Herein, hierarchical dandelion-like CoS2 hollow microspheres were reasonably constructed via a solvothermal-hydrothermal etching-in situ vulcanization process. The structure morphology, composition and electromagnetic performance of all samples have been thoroughly tested. The research results demonstrated that the structure morphology of the prepared samples with a volume ratio of 1 : 1 between ethanol and H2O remained intact without serious damage. Notably, the as-obtained hierarchical dandelion-like CoS2 hollow microspheres (25 wt%) exhibited excellent microwave absorption capacity with a minimum reflection loss (RLmin) of -47.3 dB and the corresponding effective absorption bandwidth (EAB) of 8.4 GHz at 3.3 mm. Moreover, the broadest effective absorption bandwidth (EAB, RL < -10 dB) reached 9.0 GHz (9.0-18.0 GHz) at the matching thickness of 3.2 mm. The unparalleled multiple features including hierarchical hollow structure, tunable complex permittivity as well as the enhanced impedance matching endowed CoS2 great promise as high-performance microwave absorbers for solving the problem of electromagnetic pollution.

Blast mitigation performance of a novel cladding–connector​ system

A novel cladding–connector system with excellent energy absorption capacity was proposed to protect vulnerable walls in frame structures subjected to blast load in the present study. The cladding–connector system was constructed by combining a sacrificial cladding consisting of an aluminum foam core sandwiched by two steel plates and four connectors made of corrugated steel tubes. On one hand, the cladding absorbed a considerable amount of blast energy. On the other hand, the connectors controlled the load transfer to the protected structure to certain specific pre-defined value. With this approach, both relatively high energy absorption and relatively low load transfer can be achieved simultaneously. Specifically, based on the quasi-static compression test on the connectors and the field blast test on the sacrificial cladding, the numerical model of the proposed system was established with ANSYS/LS-DYNA and validated with the test results. Then the deformation mode, energy dissipation, and load transfer of the cladding–connector systems with flexible or rigid connectors under various charge weights were numerically studied and compared. Results showed that the proposed cladding–connector​ systems could dissipate a considerable amount of energy under blast, in which the major part was dissipated by the cladding and the rest by the connectors. Particularly, compared to the cladding–connector system with rigid connectors, the cladding–connector system with flexible connectors exhibited superior performance in terms of energy absorption and load transfer, especially under intense blast. With the merits of excellent energy absorption, significant blast intensity reduction, and load shift from the vulnerable walls to the load-bearing components, the proposed cladding–connector system with flexible connectors was more promising to effectively protect the existing frame structures against blast.

Facile, cost-effective and mechanically stable graphene-melamine sponge for efficient oil/water separation with enhanced recyclability

Water contamination due to the accidental release of oil spills and the discharge of industrial wastes into water bodies is considered an ecological disaster worldwide. At present, it is imperative to establish a low-cost method for the efficient separation of oils from water to address this problem. Here, a facile and cost effective approach to fabricate graphene modified melamine sponge (MS) is reported (rGO-MS) for efficient oil/water separation. The pristine MS is dip coated with graphene oxide (GO) followed by post treatment with thiourea to obtain the final rGO-MS with enhanced hydrophobic behavior. The water contact angle of the prepared rGO-MS is about ∼145°, which signifies its excellent hydrophobic character. The prepared rGO-MS shows excellent mechanical integrity with no significant deformation in its shape after applying load on it for 500 cycles. Only 10% of deformation occurred after 100 cycles of the pressing-releasing cycle by hand. The rGO-MS shows excellent absorption capacity for various oils such as soybean oil, kerosene, petrol, diesel, mustard oil and organic solvents such as acetone, ethanol, chloroform, toluene and DMF (Dimethylformamide). The rGO-MS has an absorption capacity in the range of ∼ 79–149 g/g, with enhanced recyclability up to 20 numbers of cycles for various oils and organic solvents. Moreover, the sponge shows high separation efficiency of 99.9% for kerosene, diesel and petrol oil. For soybean oil and mustard oil, the separation efficiency is about ∼97.0% and ∼95.4% respectively. The use of very less expensive material with ease of fabrication technique will lead to the large scale production of the rGO-MS, which will help in the efficient oil/water separation process very economically.

Interfacial Polarization-Dominated Dielectric Loss in SnO2@rGO Electromagnetic Wave Absorbers

Interfacial polarization is generally a major cause of dielectric loss, but its exact contribution to the electromagnetic wave (EMW) absorption capacity of absorbers remains to be elucidated. In this work, SnO2@rGO composite (S2) with tight interfaces formed by chemical bonds and SnO2/rGO mixture (S3) were synthesized by a simple chemical route followed by further calcined in argon, respectively. Compared with pure SnO2 (S1) and S3, S2 exhibits much better EMW-dissipation ability, with a smaller minimum reflection loss (RLmin) value of −20.5 dB at a matched thickness of 5 mm and a larger effective absorption bandwidth (fe) value of 5.8 GHz (from 11 GHz to 16.8 GHz) at 3.2 mm. By comprehensively comparing the defects, dipoles, and interfaces in S2 and S3, it is concluded that the excellent EMW absorption capacity of S2 is mainly caused by strong dielectric loss dominated by interfacial polarization as well as suitable impedance matching. This study provides an insight into the exact contribution of interfacial polarization to the EMW-dissipation ability of absorbers, showing that the EMW absorption of graphene-based composites can be effectively promoted by constructing well-connected interfaces between graphene and absorbers.

Deformation and energy absorption of the laminated reentrant honeycomb structures under static and dynamic loadings

As a promising energy absorbing structure, reentrant honeycomb (RH) structures have been focus of interest in recent years. By reasonably adjusting the geometric configuration of the honeycomb cell, advanced structures with unique mechanical properties and deformation behaviors can be designed flexibly and novely. In this work, inspired by the composite laminates, a novel laminated reentrant honeycomb (LRH) structure is developed by controlling the orientations of RH layers for achieving excellent energy absorption capacity. Mechanical and deformation characteristics of the proposed structures under static and dynamic loadings are investigated experimentally and numerically. By comparing with single-layer RH structure with the same thickness, the results demonstrate that LRH structures have better energy absorption capacity. The deformation modes of RH and LRH structures are also discussed and it is noted that the LRH structure with ±30° honeycomb sublayers shows zero Poisson’s ratio effect. It is worth emphasizing that LRH with 0° and 90° sublayers presents similar negative Poisson’s ratio effect with RH by analyzing the equivalent Poisson’s ratio-strain curves. In addition, it is found that the latter structure has the best energy absorption capacity when the thickness of single-layer 0° RH structure equals to 5 mm. This work provides a new and reliable thought to design the advanced protective structures under compression and impact loadings.

Light-Mediated Modulation of Enzyme-Mimetic Activity of CuMnO2 Nanosheets.

As typical copper-based-manganese delafossites, CuMnO2 nanoflakes (CuMnO2 NFs) display excellent light absorption capacity, showing great promise for facile regulation of catalysis reactions by light stimulation. Here, we report that the as-prepared CuMnO2 NFs possess intrinsic peroxidase- and oxidase-like activities, which are capable of catalyzing the oxidation of the enzymatic substrate 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2 or O2, respectively. Additionally, CuMnO2 NFs exhibit significant light-enhanced dual enzyme-like performance (peroxidase and oxidase) for accelerating the oxidation of TMB, owing to a much greater light-induced reactive oxygen species (ROS) yield. The light-induced hydroxyl radicals (·OH) and superoxide radicals (O2•-) hold the key to rapidly catalyzing the oxidation of TMB into the two-electron charge transfer complex diamine, subsequently improving the oxidation capacity and enzyme-like activity of CuMnO2 NFs as peroxidase and oxidase mimics. These findings confirm an efficient way to improve the enzyme-like performance of nanozymes and regulate the reactive oxygen species (ROS) level by simply employing irradiated light. This work also provides a general method for constructing external field-modulated smart nanozymes and an insightful approach to the corresponding enzyme-mimetic reaction mechanism.

Snap-fit mechanical metamaterials

Reusability and multi-functionality are challenges in the design of energy-absorbing structures, which may realize through special metamaterials. Multistable mechanical metamaterials with different energy barriers are one of the most promising candidates to achieve this goal. Here, a novel snap-fit based modular multistable mechanical metamaterial was proposed for energy absorbing, together with reprogrammable, reconfigurable and reusable properties. The multistable states of metamaterials was achieved by connecting the snap-fit units in series and the modular design was realized with the mechanical response decoupling of these assembled units connected in parallel. The mechanical performances of single snap-fit unit and metamaterials are theoretically, numerically and experimentally investigated. It is evident that the designed metamaterials exhibit excellent impact resistance and energy absorption capacity in the demonstrative experiments, which can be considered as a potential candidate in the development of shock absorbers. The metamaterials can also be adapted to different non-planar protectors with flexibly deployed and easily replaced in complex environments. This strategy provides new mentality and methods for the design of reusable impact protection devices, material constitutive simulators, mechanical information storage and logic gates, robots and many other fields and devices.

Investigation on the electromagnetic wave absorption properties of foamed cement-based materials

To prevent the electromagnetic pollution of the architectural space, the foamed cement-based materials with high electromagnetic wave (EMW) absorption performance and wide effective absorption bandwidth (the reflectivity less than −10 dB) was fabricated in this study. EMW absorption performance of foamed cement-based materials was investigated, and the mechanism of EMW transmission and attenuation were analyzed. The results show that porosity, sample thickness, and pore size have remarkable effects on the EMW absorption performance. With the porosity of 61.5 %, the thickness of 40 mm, and the mean pore diameter of 301 μm, the effective absorption bandwidth reaches 12.7 GHz in the range of 2–18 GHz. The excellent EMW absorption capacity of foamed cement-based materials is mainly due to the introduction of pores, which improve the impedance matching properties and increase scattering and multiple scattering as well as coherent attenuation. Foamed cement-based materials with high EMW absorption performance, low bulk density, and cost can be deemed an ideal candidate for EMW absorption in engineering.

Phase-change nanofluids based on n-octadecane emulsion and phosphorene nanosheets for enhancing solar photothermal energy conversion and heat transportation

To offer a solution for low heat transfer and solar energy-storage performance of conventional phase-change fluids, we designed a direct absorption solar energy collecting system based on n -octadecane/phosphorene (PR) nanosheet phase-change nanofluids for capturing solar energy with high energy conversion efficiency and rapid heat response and transfer. The phase-change nanofluids were fabricated through homogenously dispersing PR nanosheets in the n -octadecane aqueous emulsion. The resultant nanofluids exhibit good dispersion stability and suitable viscosity under an optimal emulsifier content of 9.0 wt % and a homogenization rate of 16,000 rpm. Although the nanofluids show a relatively lower latent-heat capacity compared to pristine n -octadecane emulsion, their thermal response and heat transfer were enhanced significantly due to the introduction of PR nanosheets, leading to an increase in thermal conductivity by 98.59% for the nanofluids containing 1.0 wt % PR nanosheets. More importantly, the n -octadecane/PR nanosheet nanofluids exhibit an excellent optical absorption capacity for solar photothermal conversion and thermal energy storage. The nanofluid containing 1.0 wt % phosphorene nanosheets presents a relative thermal storage capacity of 152% by taking pristine n -octadecane emulsion as a control. The nanofluids also show good working stability for the long-term use in solar photothermal conversion and thermal energy storage. The phase-change nanofluids developed in this study exhibit great application potential in solar energy capture and photothermal energy utilization thanks to their enhanced thermal conductivity, high energy-storage density, suitable viscosity, thermal reliability, and excellent photothermal conversion and energy-storage capability. • A novel type of phase-change nanofluids was developed for high-efficient solar energy utilization. • The nanofluids were fabricated by a combination of n -octadecane emulsion and phosphorene. • The nanofluids present good dispersion stability, high thermal conductance, and suitable viscosity. • The nanofluids exhibit an excellent solar photothermal conversion and energy-storage capability. • The nanofluids find great potential for solar energy capture and harvest applications.

CuS anchored onto peanut-like BiVO4 p-n heterojunction with enhanced photocatalytic degradation activity under visible light irradiation

• Peanut-like CuS/BiVO 4 p-n heterojunctions were prepared by two-step hydrothermal method. • CuS/BiVO 4 composites exhibit high activity of glyphosate degradation under visible light. • The reaction rate constant of 8%CuS/BiVO 4 is 3.8 times greater than that of BiVO 4 . • CuS/BiVO 4 strongly promotes the separation of photoexcited electron and hole pairs. Seeking cheap photocatalysts for practical application is a great challenge. It is greatly significant to construct heterojunctions for the efficient separation of photoexcited carriers. Herein, a peanut-like CuS/BiVO 4 p-n heterojunction is prepared using thiourea as the raw material via a two-step hydrothermal process. The 8%CuS/BiVO 4 composite has many advantages, including excellent visible light absorption capacity, photoelectric performance, and enhanced glyphosate degradation rate by 3.8 times compared to BiVO 4 . The probable photocatalytic mechanism is proposed according to the XPS, DRS, photocurrent, PL, and experimental results. The intimate interface contact between CuS and BiVO 4 effectively achieves quick separation of photoinduced charge carriers and improves photocatalytic activity, thus enhancing degradation efficiency of glyphosate. The glyphosate degradation path is also investigated according to the intermediates detected by mass spectrometry.

Bioinspired SiC aerogels for super thermal insulation and adsorption with super-elasticity over 100,000 times compressions

Silicon carbide (SiC) aerogels with high porosity and excellent thermal stability are a promising thermal insulation and adsorption material. However, the poor mechanical properties of SiC aerogels greatly limit its practical application. Herein, inspired by flexible palm bark, for the first time, we report a novel method called “bioinspired link assembly” (BLA) to fabricate bioinspired SiC aerogels (BSA) with significant layered structure. The layered structure and elastic links are in situ constructed in bioinspired link assembly process. The BLA method optimizes structure of the BSA by regulate monolayer dimensions. Owing to the elastic links between the layered structures, the BSA can be bent 180°. Moreover, the BSA shows super-elasticity (elastic deformation up to 70 %) and fatigue resistance (100000 compressions). Benefiting from layered structure, the BSA exhibits an ultralow thermal conductivity (0.027 W m−1 K−1). In addition, BSA shows excellent absorption capacities (weight gain about 44 ∼ 72 times) for organic solvents. Therefore, the excellent comprehensive properties make BSA have broad application prospects in the fields of high temperature thermal insulation and oil pollution treatment.

Constructing oxygen absorption and activation sites in Ce-doped g-C3N4 photocatalyst for effective removal of amoxicillin: Performance, mechanism and degradation pathways

Accelerating oxygen absorption and activation to generate O2− efficiently is challenging toward photocatalytic removal of antibiotic pollutions for water treatment. Herein, the Ce-doped g-C3N4 photocatalysts with active sites for adsorbing and activating oxygen were prepared by a pyrolysis method. It was found that CeCN-1 exhibits excellent performance toward the photocatalytic degradation of amoxicillin (AMX), which was about 3.4 times more than that of pure g-C3N4. Both experimental and theoretical studies elucidated that the Ce-g-C3N4-x have excellent oxygen absorption and activation capacity attributed to the doping of Ce ions destroys the original sp2 hybrid mode of nitrogen and carbon in the triazine ring, and the increase of solitary electrons forms the activated site. Meanwhile, the generation of N vacancies sites not only accelerate the conversion of excitons to photogenerated carriers but also generate more O2− acting as the main active species for the AMX degradation. Additionally, the photocatalytic degradation pathway of AMX was revealed through HPLC-MS and Fukui index based theorical calculation, proving that the intermediate products degraded by AMX are non-toxic and harmless. This study disclose the superiority of constructing the O2 adsorption and activation sites for photocatalytic removal of antibiotic pollutants.

Bio-inspired 3D-printed lattice structures for energy absorption applications: A review

The biomimetic approach rapidly evolves for designing novel lightweight structures and has been expanding in engineering design. Additive manufacturing or 3D printing permits three-dimensional parts to be fabricated with an intricacy and quality that might be tough or impossible to appreciate with the present traditional production techniques. With the probabilities and exactitude, 3D printing allows bio-inspired lattice structures from nature that are hypothetically advanced to ingest excellent energy absorption capacity with less material. The combination of additive manufacturing with cellular lattice architectures offers potential design options regarding material utilization, strength, cost, and component weight. A summary of recent advances in the improvement of bio-inspired structures is outlined in this review paper. Specifically, exciting highlights and remarkable mechanical properties of bio-inspired structures of bones, teeth, and dermal layers of creatures might be bio-mimicked to style economical energy absorbers. Researchers and engineers can use this information to create unique designs inspired biologically for the application of absorption energy.

Piperazine-Linked Metalphthalocyanine Frameworks for Highly Efficient Visible-Light-Driven H2O2 Photosynthesis.

Artificial photosynthesis of H2O2 from O2 reduction provides an energy-saving, safe, and green approach. However, it is still critical to develop highly active and selective 2e- oxygen reduction reaction photocatalysts for efficient H2O2 production owing to the unsatisfactory photosynthesis productivity. Herein, two new two-dimensional piperazine-linked CoPc-based covalent organic frameworks (COFs), namely, CoPc-BTM-COF and CoPc-DAB-COF, were afforded from the nucleophilic substitution reaction of hexadecafluorophthalocyaninato cobalt(II) (CoPcF16) with 1,2,4,5-benzenetetramine (BTM) or 3,3'-diaminobenzidine (DAB). Powder X-ray diffraction analysis in combination with electron microscopy and a series of spectroscopic technologies reveals their crystalline porous framework with a fully conjugated structure and eclipsed π-stacking model. Ultraviolet-visible diffuse reflectance absorption spectra unveil their excellent light absorption capacity in a wide range of 400-1000 nm. This, together with their enhanced photo-induced charge separation and transport efficiency as disclosed by photocurrent response and photoluminescence measurements, endows the as-prepared piperazine-linked CoPc-based COFs with superior photocatalytic activity toward O2-to-H2O2 conversion under visible-light irradiation (λ > 400 nm). In particular, CoPc-BTM-COF exhibits a record-high H2O2 yield of 2096 μmol h-1 g-1 among the COF-based photocatalysts and an impressive apparent quantum yield of 7.2% at 630 nm. The present result should be helpful for fabricating high-performance and low-cost photocatalysts for visible-light-driven H2O2 photosynthesis.

A New Material Model for Agglomerated Cork

It is increasingly necessary to promote means of production that are less polluting and less harmful to the environment following the UN 2030 agenda for sustainable development. Using natural cellular materials in structural applications can be essential for enabling a future in this direction. Cork is a natural cellular material with an excellent energy absorption capacity. Its use in engineering applications and products has grown over time, so predicting its mechanical response through numerical tools is crucial. Classical cork modeling uses a model developed for foam material, including an adjustment function that does not have a clear physical interpretation. This work presents a new material model for an agglomerated cork based solely on well-known hypotheses of continuum mechanics using fewer parameters than the classical model and further a finite element framework to validate the new model against experimental data.

The preparation of CaCO3-polyalkoxysilane porous nanocomposites as effective sorbent for oil spill removal.

The novel porous nanocomposite sorbent was synthesized by the condensation of the diol monomer with the alkoxysilane cross-linker at moderately high temperatures in the presence of nano-CaCO3 particles. The structural, thermal, and morphological properties of the nanocomposite sorbents were determined by using Fourier transform infrared spectroscopy (FTIR), solid-state CPMAS 13C and 29Si NMR,scanning electron microscope (SEM), and thermal gravimetric analysis (TGA). Adding nano-CaCO3 to the network structure of the polymer not only provided pores to the sorbent but also enhanced its sorption capacity towards various oils and toxic organic solvents. The nanocomposite sorbent exhibited excellent absorption capacity for different toxic organic solvents and oils and great reusability for ten cycles. Moreover, the obtained sorbent material selectively absorbed organic liquids from the surface and bottom of the water without any capacity change owing to their hydrophobicity and oleophilicity. These features of the nanocomposite make it a potential sorbent for the cleaning of oils and oil derivative organic contaminants from the environment.

A simple multiple-amine heterogeneous composite for efficient conversion of CO2 to cyclic carbonates under atmospheric pressure

A novel process for efficient conversion of CO2 to cyclic carbonates under atmospheric pressure in the absence of solvents has been achieved by using cheap and readily available multiple-amine material (PS-PEI) as a catalyst. As a metal-free catalyst, PS-PEI showed excellent catalytic activity and CO2 absorption capacity. PS-PEI can participate in the cycloaddition of a variety of epoxides and CO2 with high yields. The structure and catalytic performance of this polymer material do not change significantly after being recycled four times. Based on the results of experiments and characterization, a possible mechanism was proposed, in which the collaboration of amine groups and chloride ion promotes the efficient activation of CO2 and epoxides. Moreover, the effect of various reaction parameters, temperature, catalyst dosage, and reaction time were investigated to optimize the reaction conditions.

Modeling optical energy gap of thin film cuprous oxide semiconductor using swarm intelligent computational method

Cuprous oxide (Cu2O) is a p-type metal oxide semiconducting material with potential in photovoltaic and photocatalysis applications due to its excellent absorption capacity in visible region and tunable energy gap. Experimental synthesis and energy gap characterization of thin film cuprous oxide semiconductor with desired dopants and varying experimental conditions for enhanced photocatalytic as well as photovoltaic activities are laborious and consume appreciable precious resources. This work hybridizes particle swarm optimization method with support vector regression algorithm for computing energy gap of thin film cuprous oxide semiconductor using the thickness of thin film and distorted lattice parameter as descriptors. The predictions of swarm-based support vector regression (S-SVR) model are compared with estimates of stepwise regression (SR) model while S-SVR shows superior performance of 39.47 %, 36.20 % and 114.41 % on testing data samples over SR model using root mean square error (RMSE), mean absolute error (MAE) and correlation coefficient (CC), respectively. The developed S-SVR model is characterized with 0.9559 CC, 0.0586 MAE and 0.028 RMSE on the basis of training samples. The developed S-SVR and SR models were further validated using external data samples while the developed S-SVR demonstrates excellent agreement with the measured values. The convincing precision demonstrated by S-SVR model would be of indispensable significance in determining energy gap of cuprous oxide semiconductor (for photocatalytic applications in pollutant removal, solar cell, gas sensors and thin film transistors) with appreciable quickness and reduced cost coupled with experimental difficulty circumvention.

Mechanism study on H2S capture of ionic liquids based on triethylenetetramine blended with ethylene glycol

Amino-functionalized ILs are promising absorbents for H2S. In this work, three triethylenetetramine functionalized ionic liquids (TETAH-ILs) were synthesized and applied to construct mixture solutions with ethylene glycol (EG). Among [TETAH][HCOO]-EG, [TETAH][BF4]-EG and [TETAH]Br-EG absorbents, [TETAH][BF4]-EG showed the greatest H2S absorption capacity. In addition, a series of factors, such as IL molar fraction, absorption temperature and H2S flow rate, were also investigated to evaluate the effects on absorption performance of [TETAH][BF4]-EG absorbent. The results showed that the 10 % [TETAH][BF4]-EG mixed solution has excellent absorption capacity (1.128 mol H2S/mol IL) at 303.15 K and 100 mL/min. In addition, the absorbent could remain 75.12 % absorption capacity after four regenerations, which displayed potential for reversibility. Furthermore, the mechanism of H2S absorption by TETAH-ILs was proposed by combining FT-IR and 1H NMR characterization and electron density topology analysis. Furthermore, the mechanism of H2S absorption by TETAH-ILs was proposed by combining FT-IR and 1H NMR characterization and theoretical calculation. The results revealed that the mechanism of H2S absorption by TETAH-ILs was the formation of IL-H2S complexes through a series of hydrogen bonds.