Three-dimensional Skeleton Research Articles

Colon length in pediatric health and constipation measured using magnetic resonance imaging and three dimensional skeletonization.

Recent magnetic resonance imaging (MRI) studies showed that colonic volumes in children are different between health and functional constipation. The length of the colon has however been rarely measured and principally using unphysiological colon preparations or cadaver studies. The main objective of this study was to measure the length of the undisturbed colon in children with functional constipation (FC) and healthy controls. Here, the colon of 19 healthy controls (10-18 years old) and 16 children with FC (7-18 years old) was imaged using MRI. Different regions of the colon (ascending, transverse, descending, and sigmoid-rectum) were first segmented manually on the MRI images. Three-dimensional skeletonization image analysis methods were then used to reduce the regions of interest to a central, measurable line. Total colon length (corrected for body surface area) in healthy controls was 56±2 cm/m2 (mean±SEM). Total colon length was significantly longer in children with FC 69±3 cm/m2 compared to controls (p = 0.0037). The colon regions showing the largest differences between groups were the ascending colon (p = 0.0479) and the sigmoid-rectum (p = 0.0003). In a linear regression model, there was a positive significant correlation between total colon length and age (R = 0.45, p = 0.0064), height (R = 0.49, p = 0.0031), weight (R = 0.46, p = 0.0059) and colon volume (R = 0.4543, p = 0.0061). Our findings showed significant differences in colon lengths between healthy controls and children with constipation. A new objective diagnostic imaging endpoint such as colon length may help to improve knowledge of colon morphology and function and, in turn, understanding of colon functional pathology.

Directed Graph-based Refinement of Three-dimensional Human Motion Data Using Spatial-temporal Information

With recent advances in computer science, there is an increasing need to convert human motion to digital data for human body research. Skeleton motion data comprise human poses represented via joint angles or joint positions for each frame of captured motion. Three-dimensional (3D) skeleton motion data are widely used in various applications, such as virtual reality, robotics, and action recognition. However, they are often noisy and incomplete because of calibration errors, sensor noise, poor sensor resolution, and occlusion due to clothing. Data-driven models have been proposed to denoise and fill incomplete 3D skeleton motion data. However, they ignore the kinematic dependencies between joints and bones, which can act as noise in determining a marker position. Inspired by a directed graph neural network, we propose a novel model to fill and denoise the markers. This model can directly extract spatial information by creating bone data from joint data and temporal information from the long short-term memory layer. In addition, the proposed model can learn the connectivity between joints via an adaptive graph. On evaluation, the proposed model showed good refinement performance for unseen data with a different type of noise level and missing data in the learning process.

Co1−xS@CNT composite with a three-dimensional skeleton for high-performance magnesium–lithium hybrid batteries

Porous Co1−xS@CNT composites were prepared using simple materials using ice crystals as templates. The composite material has a porous three-dimensional skeleton structure and is highly reversible as an electrode for Mg2+/Li+ hybrid cells.

Understanding erosion resistance mechanisms of sodium aluminate silicate hydrate in erosion environments: a molecular dynamics study.

Sodium-aluminate-silicate-hydrate (NASH) gel, as the primary reaction product stimulated by alkali in silica-aluminum-rich minerals, influences the mechanical and durability properties of geopolymers. In erosion environments, NASH demonstrates superior compressive strength and erosion resistance compared to hydration products of ordinary Portland cement. However, the underlying erosion resistance mechanism of NASH under such conditions remains unclear. Therefore, this study employs molecular dynamics research methodology to investigate the alteration in performance and deterioration mechanism of NASH in erosive environments. The findings reveal that in Na2SO4 solution, the infiltration of H2O molecules and Na+ ions into the three-dimensional mesh structure of NASH results in slight expansion and reduced tensile strength. Although H2O intrusion induces hydrolysis of the three-dimensional skeleton, the adsorption sites within NASH possess the capability to capture externally introduced Na+ ions. During tensile loading, Na+ ions can interact with reactive oxygen species produced through stretching or H2O molecule-induced decomposition of the internal framework, facilitating the repair of fractured structures. Consequently, this process partially alleviates tensile rupture, modifies the fracture damage mode, enhances overall toughness, and improves resistance against sulfate attack.

Hydration deactivation mechanism of the 〈100〉 oriented cuprous oxide photocathodes in solar water splitting and the regenerated three-dimensional structure.

Photocorrosion is the most ticklish problem of cuprous oxide (Cu2O), and it is widely assumed that the deactivation of Cu2O photocathodes in solar water splitting is caused by spontaneous oxidation-reduction (REDOX) reactions. However, this work shows that 〈100〉-oriented Cu2O photocathodes undergo a non-REDOX hydration deactivation mechanism. Briefly, water molecules are embedded in the Cu2O crystals at low potential under illumination and produce amorphous CuOH, which can be dehydrated at high potential to heal the Cu-O-Cu bonds and regenerate foamed Cu2O films with a three-dimensional skeleton structure. This study provides a new insight towards the protection and application of Cu2O photocathodes.

An ultra-stable and sensitive Ag-HP-β-CD/GO/NCF SERS substrate combine with the coffee-ring effect strategy for trace PAHs detection

This study proposes an ultra-stable and highly sensitive SERS substrate based on Ag nanoparticles/graphene oxide nanosheets hybrids decorated nanocellulose fiber (Ag/GO/NCF), which was further functionalized with hydroxypropyl-β-cyclodextrin (Ag-HP-β-CD/GO/NCF) for the trace detection of polycyclic aromatic hydrocarbons (PAHs). The Ag/GO hybrid structure enables the substrate to exhibit high SERS activity through the synergistic effect of electromagnetic and chemical enhancement. Simultaneously, the three-dimensional skeleton structure of NCF serves as a support matrix, ensuring the exceptional stability of the substrate. Furthermore, this study introduces a SERS measurement strategy utilizing the coffee-ring effect and explores parameters optimization to further enhance the detection sensitivity while maintaining the homogeneity and reproducibility. With the affinity effect of HP-β-CD and the enrichment effect of the delocalized π-electron system in GO, the hydrophobic PAHs could easily approach the SERS hotspots and achieve their trace detection. The limit of detection (LOD) for four representative PAHs, including pyrene, fluoranthene, phenanthrene and fluorene, are found to be 3.32 ug/L, 3.65 ug/L, 40.97 ug/L and 56.24 ug/L, respectively. These results highlight the potential application of this highly efficient SERS platform in environmental monitoring.

Development and experimental validation of a humanoid pedestrian model that captures stepping behavior and body rotation

This paper presents a novel humanoid pedestrian model (HPM) incorporating stepping behavior and body rotation. The HPM is composed of two main components: (a) body modeling and (b) gait planning. A pedestrian is represented as a three-dimensional skeleton with 11 degrees of freedom in the body modeling component, which provides a universal approach for explaining the mathematical correlations between joint rotation angles and critical gait parameters such as step length, step width, and projected shoulder width. A framework for designing gaits that accounts for step-synchronization behavior and the effect of body rotation on stepping behavior is offered by the gait planning process. To validate the model, two types of experiments were conducted: nine sets of single-file experiments and 10 sets of bidirectional flow experiments, in which pedestrians walked in a 0.5-m-wide circular corridor and rotated their bodies to avoid collisions. It was suggested by the fundamental diagrams that body rotation reduces the walking speed of a pedestrian and consequently affects the overall flow rate. Furthermore, it was found that pedestrians were more resistant to moving forward in narrow bidirectional flow environments and tend to wait for a larger gap in front to take a longer or faster step. This behavior led to the formation of stop-and-go waves in the narrow-corridor scenario. The simulation results were consistent with the experimental findings in terms of flow-density relationships and the reproduction of stop-and-go waves. Additionally, synchronized steps were detected in the simulation and quantitatively compared with a publicly available dataset. The HPM offers a new perspective on modeling pedestrian dynamics and emphasizes the necessity of accounting for micro-characteristics at the step level in pedestrian models.

Eliminating concentration polarization with gradient lithiophilic sites towards high performance lithium metal anodes under low N/P ratio

Three-dimensional (3D) skeletons have been extensively explored for effectively inhibiting dendrite growth and mitigating the volume change of lithium (Li). However, the ionic concentration polarization ascribing to the different ionic transmission distance in 3D skeletons inevitably induce the uneven growth of Li, leading to preferential deposition of Li in the top region rather than a spatially ordered manner from bottom-up. This uncontrollable deposition will deviate the original guidance of 3D skeleton. In this study, a gradient lithiophilic carbon fibers (CFs) is designed and constructed by regulating the distribution of ZnO nucleation sites (CFs@GZnO skeleton) to achieve a spatially ordered Li plating/stripping process. Additionally, the top lithiophobic CFs layer acts as a buffer layer to accommodate inactive Li, avoiding the block of Li+ inward migration, the middle and bottom CFs layer decorated with different amounts of lithiophilic ZnO nucleation sites enable lithium preferentially deposits in the bottom layer and further supporting the sequential bottom-up depositing process. Benefiting from this gradient lithiophilic design, the non-uniform ionic polarization within the 3D skeleton is mitigated, effectively inducing Li plating/stripping in a controllable spatially ordered manner and suppressing the volume variation. Full cell with an ultrahigh mass loading NCM811 cathode (38 mg cm−2) and Li-CFs@GZnO (CFs@GZnO skeleton pre-plated with Li) anode under a low negative to positive N/P ratio of 2 achieved a lifespan of 100 cycles with a capacity fading of only 0.083 % per cycle and an average CE of 99.7 %. Thus, the strategy of inducing gradient lithiophilic sites into 3D skeletons may provide a new avenue to construct a dendrite-free and stable metal anode for high energy density LMBs.

Direct-writing assembly of high-strength hierarchical porous mullite-based lattices with a multiscale reinforcing strategy

High-strength mullite-based lattices with a hierarchical porous structure were assembled using waste fly ash hollow microspheres (FAHMs) as the main raw material by a direct ink writing (DIW) technique. The hollow microspheres were uniformly distributed in the strut matrix, creating a pore structure with a size ranging from 54 μm to 97 μm. Wet printed lattices were solidified by a protein gelling technique to further inhibit the shape deformation. Hollow microspheres, together with the dense matrix formed by aluminum silicate powder, formed the three-dimensional skeleton of struts in the mullite-based lattices. The lattice with a porosity of 84.3 % exhibited a high compressive strength of 2.74 MPa, along with a low thermal conductivity of 0.191 W m−1 K−1. Compared to most reported lattices with the same density, such as conventional mullite lattices, the stretching-bending dominated hierarchical porous mullite-based lattice exhibited superior mechanical properties. These lattices with both high porosity and high strength are cost-effective, flexible, scalable, and can facilitate the application of porous ceramics in emerging fields.

NixSy/NF composites assembled by sulfidation of nickel foam (NF) for highly effective capture of iodine

Under a facile one-step hydrothermal reaction by changing thiourea dosage to regulate sulfidation degree of nickel foam (NF), a variety of nickel sulfide composites of n-NixSy/NF (1-Ni3S2/NF, 3-Ni3S2 and 6-Ni3S2/Ni9S8) were prepared and utilized to capture iodine for the first time. The compositions and structures of the composites and their influence on iodine adsorption performance were elaborated in detail. During adsorption, Ni0 in NF and Ni0/S2− in Ni3S2/Ni9S8 both served as reducing agents to achieve the chemisorption for iodine, where the Ni0 and S2− were oxidized to Ni2+ and elemental S0 (S8), and the I2 molecules were reduced to I− which then reacted with the Ni2+ to form NiI2. The 1-Ni3S2/NF, 3-Ni3S2 and 6-Ni3S2/Ni9S8 exhibited different iodine adsorption capacities (qmI) of 1442, 1109 and 420 mg/g for iodine vapor, and 1191, 869 and 296 mg/g for iodine in solutions, respectively, giving the largest qmI of 1442 (for I2 vapor) and 1191 mg/g (for I2 in solution) by 1-Ni3S2/NF. The capture mechanism for iodine in solution was mainly by chemisorption, while for iodine vapor, profiting from the three-dimensional skeleton of NF, besides the chemisorption, physical sorption also played a role. After γ irradiation, the structures of n-NixSy/NF were well-maintained and iodine adsorption performance did not deteriorate, indicating the good radiation resistance. This work provides an important reference for tailoring new kinds of cost-effective sorbents to trap iodine from radioactive nuclear wastes.

The fabrication of a boron nitride/ammonium polyphosphate skeleton based on ice template method for thermal conductive and flame retardant epoxy

Epoxy (EP) is widely used in the field of high-speed communication and microelectronics. However, its poor thermal conductivity and high flammability bury the hidden danger of fire accident. In this work, the hexagonal born nitride (h-BN) combined with ammonium polyphosphate (APP) constructs a three-dimensional skeleton (3D-BN) via bidirectional freezing technology. The 3D-BN skeleton is immersed into the EP matrix to obtain the EP/3D-BN composite, which is endowed with high thermal conductivity and flame retardancy. When the loading of hexagonal born nitride (h-BN) is 9.1 vol%, the thermal conductivity of EP/3D-BN3 composite reaches 1.67 W m−1 K−1, which is increased by 944 % compared with that of the control EP. The peak heat release rate (PHRR) and total heat release (THR) of EP/3D-BN3 are significantly reduced by 54 % and 34 % respectively. This EP/3D-BN composite provides potential applications toward the industrial production for microelectronic devices.

Nanosilica-filled flame-retardant copolyester electrospun composite separators for high-performance safe lithium-ion batteries

The essential role of separators in battery safety and electrochemical performance makes it necessary to create advanced separators for next-generation energy storage systems. However, conventionally commercial polyolefin separators often have problems with poor thermal stability and insufficient electrolyte wettability, resulting in restricted battery performance and serious safety issues of lithium-ion batteries. Herein, we report a separator composed of silica (SiO2) nanoparticles and intrinsically flame-retardant copolyester P(ET-co-PN)5 electrospun nanofibers, i.e. SiO2@P(ET-co-PN)5 (SP) separator. The copolyester nanofiber's three-dimensional skeleton filled with close-packed SiO2 nanoparticles endows the separator with good mechanical performance (tensile strength of 9.8 MPa) and electrolyte wettability (electrolyte uptake of 333 %), superior heatproof and fireproof properties (no shrinkage at 250 °C, PHRR of 111.6 W/g, and THR of 9.4 kJ/g). The LiFePO4/SP/Li cells exhibit high capacity of 150.2 mAh/g, high average Coulombic efficiency of nearly 100 %, and impressive capacity retention close to 100 % after 220 cycles at 0.5 C. Notably, the LiFePO4/SP/Li cells can endure 1000 cycles at 5 C with 53 % of capacity retention and approximately 100 % of Coulombic efficiency. Moreover, it delivers an initial capacity of 148 mAh/g and retains 123.2 mAh/g over 45 cycles at 120 °C.

Oriented Three-Dimensional Skeletons Assembled by Si3N4 Nanowires/AlN Particles as Fillers for Improving Thermal Conductivity of Epoxy Composites.

With the miniaturization of current electronic products, ceramic/polymer composites with excellent thermal conductivity have become of increasing interest. Traditionally, higher filler fractions are required to obtain a high thermal conductivity, but this leads to a decrease in the mechanical properties of the composites and increases the cost. In this study, silicon nitride nanowires (Si3N4NWs) with high aspect ratios were successfully prepared by a modified carbothermal reduction method, which was further combined with AlN particles to prepare the epoxy-based composites. The results showed that the Si3N4NWs were beneficial for constructing a continuous thermal conductive pathway as a connecting bridge. On this basis, an aligned three-dimensional skeleton was constructed by the ice template method, which further favored improving the thermal conductivity of the composites. When the mass fraction of Si3N4NWs added was 1.5 wt% and the mass fraction of AlN was 65 wt%, the composites prepared by ice templates reached a thermal conductivity of 1.64 W·m-1·K-1, which was ~ 720% of the thermal conductivity of the pure EP (0.2 W·m-1·K-1). The enhancement effect of Si3N4NWs and directional filler skeletons on the composite thermal conductivity were further demonstrated through the actual heat transfer process and finite element simulations. Furthermore, the thermal stability and mechanical properties of the composites were also improved by the introduction of Si3N4NWs, suggesting that prepared composites exhibit broad prospects in the field of thermal management.

Cation-deficient perovskite Li0.35Nd0.55TiO3 as a high-performance anode for lithium-ion batteries

Due to the advantages in rate capability, cycling performance, and structural stability, oxide perovskites have received increasing attention in the field of fast-charging lithium-ion batteries (LIBs). Here, cation-deficient perovskite Li0.35Nd0.55TiO3 (LNTO) is synthesized and reported as a novel high-performance anode material without further modification. With an average operating potential of 0.73 V vs. Li+/Li, the anode possesses a reversible specific capacity of 202 mAh g−1 at 0.1 C (1 C = 200 mA g−1). Owing to the intrinsically fast Li+ migration channels and three-dimensional skeleton structure, LNTO exhibits excellent rate performance (58 % capacity retention at 40 C) as well as impressive cycling stability (93.5 % capacity retention after 1600 cycles at 10 C). Structural evolution characterization demonstrates a simple solid-solution reaction with the volume change of only 5.51 %. The LiFePO4//LNTO full cell displays outstanding cycling stability (82.8 % capacity retention after 1000 cycles at 5 C) in practical application. Relating the A-site structure to the electrochemical performance, we further provide some insights for the rational design of next-generation fast-charging electrode materials.

Synthesis of vertically aligned and interconnected BN fiber skeleton for significantly improving thermal conductivity of PVDF

Seeking efficient thermal management materials for electronic components is urgent and important. BN has high thermal conductivity and good insulating properties, making it an ideal polymer filler for improving thermal conductivity. Currently, because of the weak interaction between BN and its high melting point, it is extremely difficult to construct a BN three-dimensional skeleton by direct sintering to achieve efficient heat transfer channels. In this work, vertically aligned BN three-dimensional skeletons with fiber walls were synthesized in one step by combining the in-situ conversion of precursor fibers and directional freeze-drying technology. The precursor fibers were expelled by the directionally grown ice crystals, forming vertically aligned fiber walls. Importantly, molten B2O3 produced during air calcination made the fibers bond to each other, thus obtaining the vertically aligned and interconnected BN fiber skeleton. Benefiting from the short-path fast heat transfer and low interfacial thermal resistance of the fiber walls, the obtained vertically aligned BN skeleton exhibited obvious structural advantages, resulting in composites with a unidirectional thermal conductivity of 1.372 W/(m·K) with the filling content of 25.7 wt% and high enhancement efficiency per unit volume of 32.6 %. This approach is expected to open a new avenue for developing highly thermally conductive composites with great potential.

Zn Single Atoms/Clusters/Nanoparticles Embedded in the Hybrid Carbon Aerogels for High-Performance ORR Electrocatalysis.

Carbon-supported zinc single-atom catalysts have received considerable attention in the electrocatalytic oxygen reduction reaction (ORR) owing to the strong reduction capacity of zinc atoms and the abundant reserves of zinc elements. The common preparation method has been limited to the high-temperature pyrolysis of nitrogen-rich organic molecules and zinc ions, which makes it difficult to further improve the ORR performance. Herein, we first prepared ZnO/PNT/rGO aerogels as precursors via a simple hydrothermal method combined with freeze-drying, in which reduced graphene oxides (rGO) and polypyrrole nanotubes (PNT) together assembled into three-dimensional frames and numerous ZnO nanoparticles were anchored in the three-dimensional skeletons. Then, ZnO/PNT/rGO aerogels were calcined at 800 °C in the argon atmosphere, in which PNT/rGO were derived carbon aerogels, ZnO nanoparticles were reduced to Zn0 by carbon, and generating zinc single atoms were captured by the surrounding nitrogen atoms or aggregated into Zn clusters/nanoparticles in the carbon substrates. The obtained products were Zn single atoms/clusters/nanoparticles embedded into PNT/rGO-derived carbon aerogels, named Zn/NC catalysts. Zn/NC catalysts display a much higher half-wave potential and a larger limiting current density than pure rGO aerogels, NC, and Zn/C catalysts, indicating the synergy of excellent electronic transportation, high mass efficiency from outstanding porosity, and several active centers. Tailoring the quantity of zinc acetate can provide the optimal ORR performance with the Eonset of 0.96 V, the E1/2 of 0.845 V, and remarkable durability. This work exploits a novel strategy of carbon thermal reduction to construct high-performance Zn-based low-dimensional ORR catalysts.

Study on the formation process and mechanism of aerobic granular sludge in the sequencing batch biofilter granular reactor.

Sequencing batch biofilter granular reactor (SBBGR) is a promising wastewater treatment technology owing to its low sludge yield and good toxicity tolerance. However, little attention has been paid to the formation process and mechanism of aerobic granular sludge in SBBGR. This study systematically investigated the formation process and mechanism of aerobic granular sludge in an SBBGR to provide a theoretical basis for optimizing the culture of aerobic granular sludge. Aerobic granular sludge with good performance was successfully cultivated after 40 days of incubation using synthetic wastewater as feed: the mixed liquid suspended solids and mixed liquor volatile suspended solids increased from 3.85 and 1.85 g/L to 31.38 and 24.74 g/L respectively, and the COD, TN, and TP removal efficiencies were 91.21%, 84.99%, and 58.14%, respectively. The experimental results showed that Amoebacteria and Bacteroides played an important role in the formation of aerobic granular sludge, filamentous bacteria acted as a three-dimensional skeleton surrounded by filling bacilli and rod-shaped bacteria, and proteins played a dominant role in promoting granulation during the culture process.

Laser-induced 3D wood-based skeleton covered with nanostructures for excellent photothermal conversion and electric conductivity

Nanosecond (ns) and femtosecond (fs) lasers have been widely used to induce various micro/nanostructures on the surfaces of different materials to construct functional micro/nanodevices. Compared with metals and semiconductors, wood is a low-cost, eco-friendly material and can be used to fabricate efficient thermal conversion devices using laser processing. In this paper, the carbonized wood (CW) was induced on the surface of wood by ns laser in one step, resulting in high absorbance of 92.5% at the wavelength of 200 to 2000 nm. The scanning electron microscope (SEM) images showed that CW has three-dimensional (3D) skeleton structures. After fs laser reprocessing, nanostripes and nanoparticles were induced on the surface of 3D skeleton structures, forming CW covered with nanostructured (NCW). The temperature of CW increased from 30.9 °C to 70.6 °C within 30 min under the light irradiation of 1 sun. In contrast, the absorbance of NCW further increased to 95.5%, and the temperature rise rate was increased by 2–3 times. In addition, the non-conductive wood becomes a conductor after laser treatment, and the resistance values of CW and NCW are 160 - 261 Ω. It was found that CW and NCW have D and G bands in Raman spectra, and the energy dispersive spectra (EDS) analysis shows that the nanostripes and nanoparticles on NCW surface are mainly composed of carbon (C) element. The photothermal conversion property of CW with 3D skeleton structures is further enhanced due to the nanostructures induced by fs laser. CW and NCW have wide applications in solar evaporation, sensor manufacturing, photoelectric devices and so on.

Electrophoretic deposition and hydroplastic foaming synthesis of three-dimensional graphene-based supercapacitor electrodes with high performance and stability

Supercapacitors (SC) are electrochemical devices that can store and deliver high power quickly and without degradation after a large number of cycles. Graphene has a wide range of applications in supercapacitors. However, its excellent performance is limited by the stacking of graphene, which reduces the electron/ion transport rate and electrochemical active sites. Three-dimensional graphene can reduce graphene stacking, which not only has more electron/ion transport channels but also increases the specific surface area and provides more electrochemically active sites. Graphene-based supercapacitor electrodes are prepared by a two-step process and do not use any conductive agents or polymeric binders. The first step is to deposit graphene oxide (GO) onto the skeleton of nickel foam (NF) using electrophoretic deposition (EPD) to obtain the precursor GO-NF. The second step is to use the hydroplastic foaming (HPF) method to stretch the graphene sheets to prepare HRGO-NF electrodes. NF provides a stable three-dimensional skeleton and GO can be stabilized on the skeleton by EPD, which improves the stability and structure of the electrode. GO is reduced to RGO by HPF and porous structures are generated between the layers. The layered porous structure effectively provides abundant ion transport channels and considerable electrochemically active sites. The capacitance value is 195 F g− 1 when the current density is 0.5 A/g. When the scan rate is 100 mv/s have 10,000 cycles, the specific capacitance value is maintained at about 98% compared with the initial capacitance, which has good cycling stability. In this work, the simple preparation process of the 3D graphene material constructed has high specific capacitance and high stability, which provides a new idea for the design and preparation of carbon electrode materials for high-performance supercapacitors.

Carboxymethyl cellulose/polyvinyl alcohol composite aerogel supported beta molecular sieve for CH4 adsorption and storage

Biomass aerogel is attractive in various applications due to their renewable, biodegradable and eco-friendly advantages. Herein, a novel beta molecular sieve/carboxymethyl cellulose/polyvinyl alcohol composite aerogel (beta/CP) is prepared by direct mixing and directional freeze-drying as an efficient gas adsorbent with hierarchical porosity. The beta molecular sieve is uniformly dispersed in the three-dimensional skeleton of the aerogel. By adjusting the loading mass of the beta molecular sieve to constitute a reasonable porosity and pore size distribution, the synergistic effect between pore structures of different scales improves the adsorption performance. The experiment results of beta/CP-4 show that the CH4 adsorption capacity can reach 60.33 cm3/g at 298 K and 100 bar, which is almost the same as that of the pure beta molecular sieve (62.09 cm3/g). The strong interaction between the aerogel and it prevents the molecular sieve agglomeration, improves the pore utilization, and also reduces the cost of using molecular sieve adsorbent. The above results indicate that the composite has good potential for application in the field of CH4 storage.