Bi2WO6 Nanosheets Research Articles

Z-scheme Au@TiO2/Bi2WO6 heterojunction as efficient visible-light photocatalyst for degradation of antibiotics

Semiconductor photocatalysis can be regarded as one of effective strategies to overcome the great challenges encountered with conventional technologies for environmental remediation. In this research, Z-scheme heterostructure composed of core–shell Au@TiO2 nanoparticles and flower-like Bi2WO6 nanosheets has been successfully prepared through the reverse micelle sol–gel method followed by a hydrothermal process. The structural characteristics, chemical compositions and photoelectrochemical properties of this ternary composite photocatalyst (Au@TiO2/Bi2WO6) were further investigated in detail. Benefitted from the synergy of the heterojunction construction and metallic surface plasmon resonance effect, the Au@TiO2/Bi2WO6 with an optimal mass ratio of Au@TiO2 to Bi2WO6 exhibited the significantly enhanced photocatalytic activity for degradation of antibiotics under visible-light irradiation, in which the degradation efficiency of sulfamethoxazole (SMX) and tetracycline hydrochloride (TC) could be up to 96.9% and 95.0% within 75 min, respectively. The reaction rate constant for SMX and TC degradation was calculated to be around 0.0425 min−1 and 0.0314 min−1, which has 7.2 times and 1.9 times enhancement compared with single Bi2WO6, respectively. In addition, the cyclic stability and photocatalytic mechanism of Au@TiO2/Bi2WO6 were further verified. Our primary results provide a feasible strategy to develop core–shell heterostructured photocatalysts with superior performance for the efficient removal of low-concentration antibiotics in water.

Interfacial engineering boosting the piezocatalytic performance of Z-scheme heterojunction for carbamazepine degradation: Mechanism, degradation pathway and DFT calculation

In this work, a Z-scheme Bi2S3-Bi2WO6 (BS-BWO) heterojunction with interfacial Bi-S bonds was constructed by in-situ growing Bi2S3 nanorods on Bi2WO6 nanosheets. The obtained BS-BWO heterojunction exhibited significantly enhanced piezocatalytic performance on carbamazepine (CBZ) degradation with an apparent rate constant of 0.087 min−1. Density functional theory (DFT) calculations together with experimental characterizations illustrated that the boosted piezocatalytic performance of BS-BWO could be ascribed to the Z-scheme charge transfer through the formed Bi-S bonds, which increased the charge transfer/separation efficiency and maintained the strong redox ability of photogenerated electrons/holes. Moreover, the increased piezoelectric potential of BS-BWO, as supported by COMSOL simulation, also contributed to the enhanced piezocatalytic performance. This study sheds light on the design and development of promising piezocatalysts for environmental remediation.

Plasmonic Metal/Semiconductor Heterostructure for Visible Light-Enhanced H2 Production

A plasmonic Ag/Bi2WO6 heterostructure, having Ag NPs deposited on Bi2WO6, is obtained by a hydrothermal and photodeposition method. The synthesized Ag/Bi2WO6 composite exhibits strong visible light absorption with a localized surface plasmon resonance (LSPR) and shows an enhanced photoabsorption property. It is demonstrated that such a Ag/Bi2WO6 heterostructure shows excellent plasmon-enhanced photocatalytic activity in the dehydrogenation of ammonia borane (NH3BH3) solution under visible light irradiation, which is due to the results from the synergetic effect between Ag NPs and emerging W5+ ions. More importantly, the performance of a Ag/Bi2WO6 hybrid is almost eight times higher than that of sole Bi2WO6 nanosheets. The introduction of LSPR of Ag in Bi2WO6 improves the electrical conductivity of the composite and lowers the recombination rate of charge carriers. This study opens up the opportunity of rationally fabricating plasmonic metal/semiconductor heterostructures for highly efficient photocatalysis.

Electrostatic self-assembly of 2D/2D Bi2WO6/ZnIn2S4 heterojunction with enhanced photocatalytic degradation of tetracycline hydrochloride

Photocatalytic degradation of organic contaminants has recently been a prominent topic in wastewater remediation. The present work reports on the synthesis of novel 2D/2D Bi2WO6/ZnIn2S4 heterojunction photocatalytic composite materials by simple electrostatic self-assembly of ZnIn2S4 and Bi2WO6 nanosheets. The photocatalytic degradation of tetracycline hydrochloride (TC-HCl) was used to assess the performance of the as-prepared samples. Bi2WO6/ZnIn2S4 nanocomposites showed enhanced activities, and the optimized sample (BWO/ZIS-50) had the greatest reaction rate constant (2.303% min−1), 2.4 and 2.2 times that of pristine Bi2WO6 and ZnIn2S4. The photocatalytic activity was increased because of better light absorption and faster photogenerated carrier separation/migration via the Z-scheme mechanism. This research is anticipated to make a contribution to the design and synthesis of 2D/2D Z-scheme nanocomposites for photocatalytic wastewater treatment.

PVP-Modified Multifunctional Bi2WO6 Nanosheets for Enhanced CT Imaging and Cancer Radiotherapy.

Malignant tumors are one of the main causes of human death. The clinical treatment of malignant tumors is usually surgery, chemotherapy, radiotherapy, and so forth. Radiotherapy, as a traditional and effective treatment method for cancer, is widely used in clinical practice, but the radiation resistance of tumor cells and the toxic side effects to normal cells are still the Achilles heel of radiotherapy. Multifunctional inorganic high-atom nanomaterials are expected to enhance the effect of tumor radiotherapy. Tungsten and bismuth, which contain elements with high atomic coefficients, have strong X-ray energy attenuation capability. We synthesized Bi2WO6 nanosheets (NSs) using a hydrothermal synthesis method and modified polyvinylpyrrolidone (PVP) on their surface to make them more stable. PVP–Bi2WO6 NSs have a variety of effects after absorbing X-rays (such as the photoelectric effect and Compton effect) and release a variety of particles such as photoelectrons, Compton electrons, auger electrons, and so forth, which can react with organic molecules or water in cells, generate a large number of free radicals, and promote cell apoptosis, thereby improving the effect of radiotherapy. We show through γ-H2AX and DCFH-DA probe analysis experiments that PVP–Bi2WO6 NSs can effectively increase cell DNA damage and reactive oxygen species formation under X-ray irradiation. Clone formation analysis showed that PVP–Bi2WO6 NSs can effectively suppress cell colony formation under X-ray irradiation. These versatile functions endow PVP–Bi2WO6 NSs with enhanced radiotherapy efficacy in animal models. In addition, PVP–Bi2WO6 NSs can also be used as contrast agents for X-ray computed tomography (CT) imaging with obvious effects. Therefore, PVP–Bi2WO6 NSs can be used as CT imaging contrast agents and tumor radiotherapy sensitizers and have potential medical applications.

Synergetic piezo-photocatalytic effect in ultrathin Bi2WO6 nanosheets for decomposing organic dye

Synergetic piezo-photocatalytic effect in ultrathin Bi2WO6 nanosheets for decomposing organic dye

Bismuth Vacancy-Mediated Quantum Dot Precipitation to Trigger Efficient Piezocatalytic Activity of Bi2WO6 Nanosheets.

Point defects in piezoelectric semiconductors play a significant role in regulating the piezocatalytic performance. However, the role of metal vacancies in piezocatalysis has been less explored than that of oxygen vacancies. Herein, Bi2WO6 (BWO) nanosheets with tunable Bi defects were synthesized using an ion exchange method. High-resolution transmission electron microscopy directly revealed the existence of Bi vacancies in the lattice of BWO nanosheets and the precipitation of Bi quasiparticles. The BWO nanosheets with the highest concentration of Bi vacancies exhibited an excellent decomposition efficiency (7.83 × 10-2 min-1) over rhodamine B under ultrasound. The phenomenon is mainly attributed to the increased charge carrier concentration as a consequence of defect energy levels. In addition, the significant enhancement of light absorption capacity caused by the surface plasmon resonance effect of quasiparticles indicates that Bi ions escape from the lattice and combine with free electrons around BWO to form Bi quantum dots, which function as electron traps to facilitate the separation of charge carriers during the piezocatalytic process. This work systematically reveals the essential affiliation of metal vacancies and surface metal clusters in piezocatalysts and verifies the significance of vacancy engineering in piezocatalytic application.

Remarkably enhanced piezo-photocatalytic performance of Z-scheme Bi2WO6/Black TiO2 heterojunction via piezoelectric effect

Current photocatalytic efficiency is quite restricted due to serious e−-h+ pairs recombination. Combining piezoelectric effect into photocatalysis is an effective strategy to improve catalytic performance. Here, a rationally designed Bi2WO6/Black TiO2 (Bi2WO6/B–TiO2) heterojunction to enable a high piezo-photocatalytic activity via piezoelectric effect is reported. The degradation efficiency of cationic dye Rhodamine B (RhB) over optimized Bi2WO6/B–TiO2 reaches 98.43% in 60 min under simultaneous ultrasonication and sunlight, which is higher than the total of those by independent photocatalysis (54.23%) and piezocatalysis (26.33%). Moreover, this hybrid Bi2WO6/B–TiO2 piezo-photocatalyst also shows promising degradation of anionic dye methyl orange (MO), methyl blue (MB) and antibiotics (diclofenac sodium, DCF) under sunlight and ultrasonication. A built-in polarization field is generated inside the Bi2WO6 nanosheets by ultrasound, which can accelerate effective segregation of photogenerated e−-h+ pairs in Bi2WO6 and B–TiO2, thereby enhancing the overall activity of the heterojunction. Furthermore, radical trapping and photodeposition experiments, EPR and VB-XPS spectra directly prove that the Bi2WO6/B–TiO2 heterojunction is a Z-scheme system. Finally, a Z-scheme piezo-photocatalytic mechanism for Bi2WO6/B–TiO2 is rationalized. This work offers a promising way to design high-efficient catalysts by combining piezoelectric effect into photocatalysis.

Preparation of flower-like Co3O4 QDs/Bi2WO6 p-n heterojunction photocatalyst and its degradation mechanism of efficient visible-light-driven photocatalytic tetracycline antibiotics

A novel flower-like Co3O4 QDs/Bi2WO6 p-n heterostructure photocatalyst was prepared by hydrothermal and ultrasonic synthesis strategies with uniformly dispersing zero-dimensional (0D) Co3O4 QDs on the three-dimensional (3D) flower-like Bi2WO6 nanosheets. The structural morphology and optical properties analysis confirmed the successful combination of the Co3O4 QDs/Bi2WO6 composite photocatalyst. Photodegradation experiments results proved that 10%-Co3O4 QDs/Bi2WO6 showed the optimum rate constant (0.017 min−1) for the degradation of TC, which was about 3.40 and 1.55 times higher than Co3O4 QDs (0.005 min−1) and Bi2WO6 (0.011 min−1), respectively. The significant improvement in the photocatalytic performance of Co3O4 QDs/Bi2WO6 was mainly attributed to the enhancement of visible light absorption capacity and the formation of p-n heterojunction, which effectively inhibited the recombination of electron/holes (e-/h+) pairs. Radical trapping experiments and electron spin resonance (ESR) spectrum demonstrated that O2– radicals were the leading active species in photocatalytic degradation. Furthermore, three-dimensional excitation-emission matrix fluorescence spectra (3D EEMs) and Liquid chromatography/quadrupole time-of-flight mass spectrometry (LC/Q-TOF MS) techniques results revealed the degradation pathway and mechanism of efficient visible-light-driven photocatalytic tetracycline antibiotics. The outstanding photocatalytic performance makes the 0D/3D Co3O4 QDs/Bi2WO6 p-n heterojunction photocatalyst a promising photocatalyst for the degradation of tetracycline antibiotics.

Preparation of core-shell MOF-5/Bi2WO6 composite for the enhanced photocatalytic degradation of pollutants

In this study, Bi2WO6 was used as carrier and the core-shell MOF-5/Bi2WO6 (MOF-5/BWO) photocatalyst was prepared successfully by a two-step hydrothermal method for the first time. The easily hydrolyzed MOF-5 was compounded with flower-like Bi2WO6, and the hydrolyzed sheet-like MOF-5 was evenly wrapped on the surface of flower-like Bi2WO6. A type-Ⅰheterojunction photocatalytic reaction mechanism was proposed, ·O2− and h+ were the main active substances in the photocatalysis process. Compare with Bi2WO6, 9% MOF-5/BWO has the best degradation activity, and the photocatalytic degradation of RhB can reach 99.31% in 30 ​min, which is 2.16 times than pure Bi2WO6. It can be proved by XPS that the enhanced visible light performance of the composite is due to the photogenerated electrons and holes of MOF-5 flow to the conduction band and valence band of the flower-shaped Bi2WO6, reducing the recombination rate of photogenerated electron-hole pairs. Compared with the flower-shaped Bi2WO6, the specific surface area of composite was also improved, increasing the contact between the active sites and the dye molecules on the Bi2WO6 nanosheets. In addition, the cycle experiment shows that composite material has excellent stability.

S-Scheme photocatalyst TaON/Bi2WO6 nanofibers with oxygen vacancies for efficient abatement of antibiotics and Cr(VI): Intermediate eco-toxicity analysis and mechanistic insights

Enlightened by natural photosynthesis, developing efficient S-scheme heterojunction photocatalysts for deleterious pollutant removal is of prime importance to restore environment. Herein, novel TaON/Bi2WO6 S-scheme heterojunction nanofibers were designed and developed by in-situ growing Bi2WO6 nanosheets with oxygen vacancies (OVs) on TaON nanofibers. Thanks to the efficiently spatial charge disassociation and preserved great redox power by the unique S-scheme mechanism and OVs, as well as firmly interfacial contact by the core-shell 1D/2D fibrous hetero-structure via the in-situ growth, the optimized TaON/Bi2WO6 heterojunction unveils exceptional visible-light photocatalytic property for abatement of tetracycline (TC), levofloxacin (LEV), and Cr(VI), respectively by 2.8-fold, 1.0-fold, and 1.9-fold enhancement compared to the bare Bi2WO6, while maintaining satisfactory stability. Furthermore, the systematic photoreaction tests indicate TaON/Bi2WO6 has the high practicality in the elimination of pollutants in aquatic environment. The degradation pathway of tetracycline and intermediate eco-toxicity were determined based on HPLC–MS combined with QSAR calculation, and a possible photocatalytic mechanism was elucidated. This work provides a guideline for designing high-performance TaON-based S-scheme photocatalysts with defects for environment protection.

Constructing Z-Scheme Charge Separation in Sulfur-Doped G-C3n4/Bi2wo6 Nanosheets Nanojunction with Enhanced Photocatalytic Activity

Constructing Z-Scheme Charge Separation in Sulfur-Doped G-C3n4/Bi2wo6 Nanosheets Nanojunction with Enhanced Photocatalytic Activity

Bi2WO6 nanosheets assembled BN quantum dots: Enhanced charge separation and photocatalytic antibiotics degradation

Herein, we have exploited their applications in photocatalytic pollution treatment due to the exciting behaviors of the tiny-sized BN quantum dots (BNQDs) co-catalyst in solar energy conversion systems and hole extraction properties. Specifically, Bi2WO6 (BWO) nanosheets were selected as the scattered substrate of fine-sized BNQDs according to their narrow band gap width and stable ultra-thin interface. In addition, the 0D/2D composite made the interface tight and shorten the charge diffusion distance. What’s also interesting was that the designed BNQDs/BWO exhibited a significant separation of photogenerated electron-hole pairs under the promotion of the BNQDs co-catalyst with the ability to attract photoinduced holes. In consequence, an obvious increment in the oxidative degradation efficiency of the best BNQDs/BWO has been achieved than that of individual BWO. The research provided a bottom-up idea for designing composite optoelectronic materials with ultra-fast charge separation by taking 0D co-catalyst as auxiliary.

One-step route for Z-scheme Al2(WO4)3/Bi2WO6 heterojunction toward superior photoelectric and photocatalytic performance

Herein, Al2(WO[Formula: see text]/Bi2WO6 heterojunctions with [Formula: see text]-type structure were successfully prepared by a one-step hydrothermal method. Moreover, the effects of different composite ratios on the properties of materials were explored. The electrochemical tests and photocatalytic degradation experiments showed that the corresponding Al2(WO[Formula: see text]/Bi2WO6 heterojunctions all exhibited improved electrochemical performance and photocatalytic performance than that of the bare Bi2WO6 material. Especially, when the molar ratio of Al to Bi was 2:1, the obtained Al2(WO[Formula: see text]/Bi2WO6 heterojunction displayed the optimal photoelectric and photocatalytic performance. In detail, it depicted the highest photocurrent density, the smallest resistance and the fastest charge transfer rate. What’s more, the RhB solution (10 ppm) could be completely degraded in 30 min under visible-light irradiation, and the removal rate was almost 1.6 times than that of pure Bi2WO6 nanosheets. In the same condition, it also exhibited excellent photocatalytic performance for the degradation of tetracycline (TC) solution (10 ppm) and the K2Cr2O7 solution (40 ppm). These results fully manifested that the constructed Al2(WO[Formula: see text]/Bi2WO6 heterojunction possessed superior photoelectric conversion capacity and outstanding photocatalytic performance. Moreover, based on the obtained experimental results, a [Formula: see text]-scheme mechanism of catalytic degradation of RhB and TC under simulated solar light was proposed and discussed.

Enhancing Fenton-like catalytic efficiency of Bi2WO6 by iodine doping for pollutant degradation

Introducing reductive species into heterogeneous catalysts can improve their catalytic efficiency in Fenton-like processes. Iodide ions (I−), a typical reductive species with good reducibility, might enhance the catalytic performance of H2O2 activation when doped in heterogeneous catalysts. In this study, the iodine-doped Bi2WO6 (IX-Bi2WO6) nanosheets were synthesized with a facile hydrothermal method and used to activate H2O2 to degrade bisphenol A (BPA). Compared with Bi2WO6, which was almost inactive, the IX-Bi2WO6 exhibited great improvement for BPA degradation. Among the fabricated catalysts, the I0.50-Bi2WO6 with an iodine content of 0.50 mmol was found to be most effective and could work efficiently in a wide pH range from 4.0 to 10.0. Moreover, with a low consumption of H2O2 (H2O2 : pollutant molar ratio = 10:1), 78% BPA was degraded within 10 min at initial pH 7.0. Unlike the conventional H2O2 activation mechanism, the direct electron transfer was verified to be the main mechanism for the BPA degradation based on the results of electron paramagnetic resonance (EPR) analysis, radical quenching, and electrochemical experiments in this work. Furthermore, the activation of H2O2 by iodine-doped BiVO4 and Bi2MoO6 was also conducted to validate the applicability of such an iodine doping approach. These results indicate that the introduction of reductive species I− is a promising and effective method to develop highly efficient Bi-based catalysts for H2O2 activation.

In-Situ Construction of 2D/2D CuCo2S4/Bi2WO6 contact heterojunction as a visible-light-driven fenton-like catalyst with highly efficient charge transfer for highly efficient degradation of tetracycline hydrochloride

The heterogeneous photo-Fenton technology by integrating the merits of photocatalysis and Fenton oxidation is verified to be a promising environmental purification technology due to its relatively mild reaction conditions, low cost and high treatment efficiency. Herein, we demonstrate the fabrication of Type-II CuCo2S4/Bi2WO6 heterojunction as an effective catalyst for the removal of tetracycline hydrochloride (TC-HCl). Two photoactive components are combined to form a two-dimensional/two-dimensional (2D/2D) heterojunction by coupling 2D CuCo2S4 with 2D Bi2WO6 nanosheets, in which CuCo2S4 cocatalyst broadens the light responsive range, facilitates the separation and transfer of photogenerated carriers. Most importantly, CuCo2S4 initiates the photo-Fenton catalysis by utilization photogenerated electrons to react with Cu (II) and Co (III) in presence of hydrogen peroxide (H2O2) to accelerate the circulation of the photo-Fenton reaction. Thus, the generated OH and·O2- are applied as potent free radical species for the catalytic degradation of pollutants. The synthesized CuCo2S4/Bi2WO6 heterostructures exhibited excellent photo-Fenton catalytic activity for TC-HCl removal. The rate constant (kapp/min−1) of 0.5% CuCo2S4/Bi2WO6 heterojunction is about 1.8 times higher than pure Bi2WO6. Recycling experiments show that the catalyst maintained its high activity after being reused for 4 cycles, reflecting its good stability. Meanwhile, hydroxyl radical (·OH) and superoxide radical (·O2-) were identified as oxygen active species, taking a key role in the degradation of TC-HCl. Based on the trapping experiment and energy band analysis, a reasonable photo-Fenton oxidation mechanism for Type-II CuCo2S4/Bi2WO6 heterojunctions is put forward. This work will arouse researchers' enthusiasm for introducing transition metal sulfides as cocatalyst to design heterogeneous photo- Fenton catalyst.

A low-dosage silver-loaded flower-like Bi2WO6 nanosheets toward efficiently photocatalytic degradation of sulfamethoxazole

Semiconducting photocatalysts composited with noble nanometals can be regarded as one of effective strategies to enhance the photocatalytic activity, attributed to a synergy of heterojuction formation and surface plasmon resonance effect. However, the dosage of nanometal in the composite for achieving an optimal performance is commonly larger than 10 wt%, causing high cost in raw materials. In this work, a composite photocatalyst of flower-like bismuth tungstate (Bi2WO6) nanosheets decorated by low-dosage silver nanoparticles (Ag NPs) with the excellent photocatalytic activity for sulfamethoxazole (SMX) degradation was prepared. Further, the morphological and structural characteristics, chemical compositions, and photoelectrical properties of this composite photocatalyst (Ag/Bi2WO6) were investigated. Different loading amounts of Ag NPs (1, 3 and 5 wt%) in Ag/Bi2WO6 were modulated, and when the dosage of Ag NPs was controlled to be only 3 wt%, the composite photocatalyst exhibited the most efficient degradation that 95.04% of SMX was removed within 60 min under visible light irradiation, which has around 3 times enhancement compared to single Bi2WO6. The sacrificial agent experiment indicated that •O2− and •OH are the main active substances in the photocatalytic degradation of SMX. And the cyclic experiment further confirmed the Ag/Bi2WO6 composite with high stability and reusability. The photocatalytic mechanism was verifiably proposed that the enhanced degradation performance was derived from more effective light absorption and photogenerated charge separation by loading Ag NPs onto Bi2WO6. Our primary results provide a basic platform for exploring the high catalytic-activity photocatalysts with low-dosage noble nanometals.

Construction of Bi2WO6/CoAl-LDHs S-scheme heterojunction with efficient photo-Fenton-like catalytic performance: Experimental and theoretical studies

The photo-Fenton-like catalytic process has shown great application potential in environmental remediation. Herein, a novel photo-Fenton-like catalyst of Bi2WO6 nanosheets decorated hortensia-like CoAl-layered double hydroxides (Bi2WO6/CoAl-LDHs) was synthesized via hydrothermal process. The optimized Bi2WO6/CoAl-LDHs composite performed the high-efficiency photo-Fenton-like catalytic performance for oxytetracycline (OTC) removal (98.47%) in the mediation of visible-light and H2O2. The comparative experiment, technical characterization and density functional theory calculation results indicated that the efficient photo-Fenton-like catalytic performance of Bi2WO6/CoAl-LDHs was attributed to the synergistic action of the Fenton-like process of cobalt ions in CoAl-LDHs, an internal electric field and the S-scheme heterojunction form between Bi2WO6 and CoAl-LDHs, which could significantly promote the active substance formation and the photocatalytic process in the catalytic system. This study will stimulate the new inspiration of designing the efficient catalytic system for environmental remediation and other fields.

Promoting photocatalytic performance of Bi2WO6 nanosheet incorporated with a 3D-Succulent plant-like SrMoO4 modified by Ag under simulated sunlight

In order to improve the photocatalytic performance of Bi2WO6, the self-assembled succulent plant-like SrMoO4 is successfully incorporated with Bi2WO6 nanosheet through co-precipitation method. Ag nanoparticles are introduced to Bi2WO6/SrMoO4 (SMO/BWO) composite to form a ternary 5 wt%Ag/4.3 wt%SMO/BWO heterojunction photocatalyst, and further promote photocatalytic activities. SEM images of the as-prepared samples demonstrate that part of the BWO nanosheet with Ag nanoparticles are adhered and embedded onto the 3D-succulent plant-like SMO. The obtained transient photocurrent, photoluminescence spectroscopy (PL) and electrochemical impedance spectroscopy (EIS) show that the separation efficiency of photo-generated electron (e−) and hole (h+) pair of the ternary photocatalyst is the highest. As a result, the 5 wt%Ag/4.3 wt%SMO/BWO heterojunction photocatalyst has highly better off photocatalytic performance under simulated sunlight for methylene blue (MB). According to the obtained apparent reaction rate constants, the photocatalytic performance values are determined to be 4.94 and 8.78 times than of the bare BWO and SMO, respectively. Furthermore, a Z-scheme electron transfer mechanism is proposed to elucidate the enhanced photodegradation performances of the 5 wt%Ag/4.3 wt%SMO/BWO heterojunction photocatalysts, as well consider the effect of local surface ion resonance of Ag nanoparticles.

Construction of GQDs‐Decorated Ultrathin Bi2WO6 Nanosheets Hydrogel: a Recyclable‐Flexible Platform with Excellent Piezo‐Photocatalytic Activity for High‐Performance Water Decontamination and its Theoretical Interpretation

AbstractIt is demonstrated that, by using the electronic reconstruction of ultrathin Bi2WO6 (BWO) nanosheets with graphene quantum dots (GQDs) upon a unique process of laser irradiation in liquid (LAL), a kind of GQDs modified BWO nanosheets under metastable state were synthesized, which performed excellent visible‐light piezo‐photocatalytic organics degradation. Furthermore, using commercial cpolyacrylamids (PAM) as the additional materials, a kind of electronic reconstruction GQDs‐BWO nanosheets hydrogel was achieved by dispersed the functionalized powders into a super absorbent polymers (SAPs) system upon in situ polymerization method, which showed that it is a bracing idea to use SAPs for water decontamination reactors to enable full use of vibration energy synergistic with light of nature to driven pollution degradation. First‐principles calculation was also simultanously performed in this study. This study may provide a new enlightenment on fabricating novel 2D nanomaterials hydrogel for efficient effluent purification and potentially other environmental or energy applications.