Journal of Physical Chemistry C
·
2023
·
IF 3.7
Alhadi Ishag,Yanxue Yue,Weiyu Zhu,Chongyu Li,Bo Zhang,Xinshui Huang,Yubing Sun
A novel nanoscale zero-valent iron/molybdenum disulfide (nZVI/MoS2) composite was synthesized and well characterized in detail. The as-prepared materials were applied for the removal of U(VI) from water solutions under various experimental conditions. The characterizations showed that nZVI/MoS2 composites exhibited a high surface area and uniform distribution of nZVI. The maximum adsorption capacities of nZVI/MoS2 obtained from the Langmuir model (71.8 mg/g at pH 4.0 and 25 °C) were higher than that of MoS2 (39.92 mg/g) due to the synergistic effect. According to the fitting of surface complexation modeling, U(VI) removal on nZVI/MoS2 included cation exchange and inner-sphere surface complexation at low and high pH, respectively, whereas the adsorbed U(VI) was partly reduced into U(IV) by nZVI/MoS2 composites. According to analysis of XPS analysis, the enhanced removal of U(VI) on nZVI/MoS2 was due to the complexation of U(VI) with various oxygenated functional groups (e.g., −OH, Fe–O, and Mo–O functional groups) and then adsorbed U(VI) was reduced to U(IV) by Fe0 and/or Fe(II). These findings showed that nZVI/MoS2 could be used as efficient adsorbents for the high elimination of U(VI) from contaminated wastewater in environmental pollution cleanup.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 33
·11204-11212
·
IF 6.4
Zhimin Mao,Su-Yun Zhang,Duo Zhao,Xiaoliang Weng,Chenxu Kang,Hui Fang,Yu-Jia Zeng
The development of metal–organic framework (MOF) materials with multifunctionalities has boosted their prospects in the fields of spintronics and optoelectronics. However, incorporating magnetic and optoelectronic properties in MOF materials remains challenging. Herein, the in situ synthesis of Cu-MOF-74, a typical one-dimensional linear magnet, is systematically investigated, which shows ferromagnetic and antiferromagnetic interactions along the axial chain direction, and overall tilted antiferromagnetism at low temperatures. In particular, the introduction of SnS:Co quantum dots (QDs) enhances the antiferromagnetic coupling, which increases the phase transition temperature of the MOF from 7.8 K to 275 K at 1000 Oe. In addition, it is demonstrated that Cu-MOF-74 possesses both magnetic and optoelectronic properties. It is found that the responsivity and detectivity of the Cu-MOF-74 photodetector are both significantly improved by the SnS:Co QDs. This research provides promising methods for concurrent improvement of the magnetic and optoelectronic properties of MOF materials, advancing in-depth research on the MOF film as a new type of semiconductor for spintronic and optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shiyue Hu,Junhong Liu,Xuanlan Luo,Qiqi Shen,Yu Qin,Haikun Hu,Jinhai Yuan,Shuangkou Chen,Di Xu
Currently, photocatalytic degradation is a fascinating technology due to its capability to treat escalating environmental problems by degrading chemicals like dyes and pharmaceuticals from wastewater. Herein, the hexagonal prism GQDs/h-MoO 3 composite photocatalyst was fabricated through a facile hydrothermal approach. The synthesized samples were identified by XRD , SEM, FT-IR, XPS , UV-Vis DRS , and PL technologies to study the crystal structure, morphology, surface chemical composition , and optical properties . The preparation circumstances of binary compounds, such as different GQDs (Graphene quantum dots) loading amounts, precursor solution pH, hydrothermal temperature, and hydrothermal time were optimized, also, and the photocatalytic activity of materials is determined by photodegradation of Methylene Blue in this approach, which systematically investigated the impact of operational conditions on the efficiency of the photocatalytic reaction. The results revealed that 10GQDs/h-MoO 3 has the best photocatalytic performance among competitors, which exhibited a high photodegradation efficiency (85.58%) of MB, and the rate was approximately 2.13 times greater than pristine h-MoO 3 . Moreover, the PL and EIS measurements proved the outstanding separation and migration ability of the photo-excited carriers of composite, which was attributable to the fact that GQDs can serve as electron transporters and acceptors to induce electron-hole separation efficiently. Finally, the free radical scavenging experiments confirmed that the primary active species was h + in the photocatalytic process, as well as a potential explanation for the improved photocatalytic activity of GQDs/h-MoO 3 photocatalysts was proposed.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Chunkai Wang,Bin Yao,Yongfeng Li,Zhanhui Ding,Ding Ma,Ting Wang,JiaYong Zhang,Dongxu Zhang,Yue Liu,Ruijian Liu
The physical properties of CdS buffer layers and the interface quality between CdS layer and Cu 2 ZnSn(S,Se) 4 (CZTSSe) absorber have a significant impact on the performance of CZTSSe solar cells. In the present work, five types of CZTSSe solar cells with conventional structure (denoted as CdS- x -cells, x = 55, 60, 65, 70 and 75) were fabricated by using CdS prepared at deposition temperatures of 55, 60, 65, 70 and 75 ℃, respectively, as buffer layer, and influence mechanism of the deposition temperature of CdS layers on power conversion efficiency (PCE) of the CdS- x -cells was investigated. It is found that the PCE of the CdS- x -cells increases from 8.52% to 10.36% as the deposition temperature rises from 55 to 60 ℃ but falls from 10.36% to 7.14% from 60 to 75 ℃. The analysis on the photovoltaic and electrical parameters indicates that the increase in PCE is predominantly derived from the decreased reverse saturated current density (J 0 ), followed by the decreased series resistance (R S ) and increased shunt resistance (R Sh ). The decreased PCE with the further increasing deposition temperature is mainly contributed from the increased J 0 , followed by the decreased R Sh and photogenerated current density (J L ). The influence mechanism of deposition temperature of the CdS layer on PCE is suggested via quantitatively analysis of influence of electrical, optical properties and crystal quality of CdS prepared at various deposition temperatures on J L and electrical parameters of CdS- x -cells. This work is helpful for improvement of PCE of CZTSSe solar cells by modification of properties of buffer layer.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 17
·5773
·
IF 3.4
Cunao Feng,Yu Guo,Xiaowei Li,Yang Cao,Qiuxue Kuang,Minghui Zhang,Dekun Zhang
The roller is an important part of the belt conveyor used in coal transportation. Due to the harsh environment of coal mines, the rollers are in a state of high load and high friction for a long time, which causes wear failure and has a serious impact on the reliability and safety of the equipment. In order to prepare roller material with excellent bearing performance and friction performance, CF/PUE composites were prepared by pouring method with polyurethane as the matrix and carbon fiber as reinforcement. Due to the low surface activity of unmodified carbon fibers and poor bonding performance with the matrix, MoS2was generated on the surface of carbon fiber by the in situ generation method in this paper. It was found that the mechanical properties of MoS2/CF/PUE composites were better when the CF content was 0.3 wt%. The Shore hardness reached 92.2 HA, which is 10% higher than pure polyurethane. The tensile strength was 38.44 MPa, which is 53% higher than pure polyurethane. The elongation at break was 850%, which is 16% higher than pure polyurethane. The maximum compressive stress was 2.32 MPa, which is 42% higher than pure polyurethane. The friction coefficient was much lower than that of pure PUE composites, the friction coefficient was 0.284, which is 59% lower than pure polyurethane.Keywords:PUE;CF;MoS2;mechanical properties;friction performance
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zitong Feng,Shuo Sun,Siyu Zhang,Wanlang Zou,Nan Hang,Linpei Zhou,Xiangyu Wei,Yuxia Sun,Jian Wen,Hongri Liu
Sb 2 S 3 has been paid extensive attentions as absorber for solar cells. Comparing with some oxides , CdS exhibits excellent compatibility to Sb 2 S 3 therefore is most commonly used as buffer layer (BL) materials for Sb 2 S 3 solar cells. Proper passivation can enhance the performance of CdS buffer layer thus raising the performances of Sb 2 S 3 solar cells. Herein, we put forward a self-passivation strategy to enhance the performance of CdS by a two-step deposition process to fabricate the self-passivated CdS BL. First, we adopted spin coating combined with annealing process to prepare flaked CdS on FTO, then we performed passivation process to the CdS by depositing another layer of CdS with chemical bath deposition (CBD) method. After Sb 2 S 3 was deposited on the self-passivated CdS by hydrothermal method , a solar cell with FTO/CdS (∼90 nm)/Sb 2 S 3 (160 nm)/Spiro-OMeTAD(48 nm)/Ag(32 nm)structure was obtained by deposition of hole transport layer and Ag electrodes. Comparing with the single spin-coating processed CdS BL or single chemical bath deposited CdS BL, the self-passivated CdS presents better performance. The CBD process presents distinctive passivation effects to the first layer. In consequence, we obtained the highest PCE of 6.04 % in the Sb 2 S 3 solar cells on the self-passivated CdS BL. The present work supplies a unique route to enhance the performances of CdS buffer layer.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Aming Xie,Ronghui Guo,Lipeng Wu,Wei Dong
Developing an effective strategy to regulate the interfacial properties of hierarchical structure is of great significance for preparation of high-performance electromagnetic wave absorption (EMA) materials. Ion-substitution can change intrinsic structure and properties of a materials, but its effect on the interfacial properties of hierarchical structure remained to be explored. Herein, we first constructed a C@MoS 2 hierarchical structure via simple hydrothermal reaction , then used the ion-substitution strategy to replace the S atoms in MoS 2 with O, F and Se, and finally obtained anion-substituted hierarchical structure (C@X-MoS 2 , X = O, F, Se). The results show that ion-substitution destroys the MoS 2 crystal structure and realizes tunable dielectric properties of C@MoS 2 , which leads to further enhancement of overall interfacial polarization. After optimization, the absorption strength and width of C@O-MoS 2 has been significantly improved. The minimum reflection loss (RL min ) reaches −62.17 dB, and the maximum effective absorption bandwidth (EAB max ) is 7.0 GHz. The simulation results show the obtained absorbent can greatly reduce the radar cross section of target, indicating it has broad application potential. Therefore, this work provides a novel method for regulation of EMA performance of hierarchical structure and preparation of high-performance absorbents.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yiding Li,Qiang Zhang,Simin Shen,Siqi Wang,Liangliang Shi,Dequan Liu,Yujun Fu,Deyan He
Effectively limiting the shuttle effect is the key to improving the electrochemical performance of Li-S batteries. Here, the synthesis of WO 3 -WS 2 heterostructures is reported by electrospinning and in situ sulfurization strategies, combining the initial WO 3 nanoparticles with the sulfurization product WS 2 . It was found that the obtained bifunctional heterostructures enhance the electrolyte wettability, optimize intermediate regulation performance, accelerate Li + /e − diffusion, and thus exhibit excellent electrochemical characteristics in Li-S batteries. Through experiments and density functional theory (DFT) calculations, the WO 3 -WS 2 heterostructures were considered as a coupled creative solution with multiple advantages. Different from the batteries using single-component or single-configuration catalyst, the prepared Li-S batteries with the WO 3 -WS 2 heterostructures exhibited synergistic enhanced electrochemical performance and high-temperature crushing resistance. Even under severe conditions, including high sulfur loading (10.3 mg cm −2 ), lean electrolyte (5.8 μL mg −1 ), high current density (7.0 A g −1 ), extended cycling (1600 cycles), and high temperature (90 °C), the representative battery exhibited stable cycling performance.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiaoping Wang,Yanling Liu,Kaiming Fan,Peng Cheng,Shengji Xia,Liwei Qian
Incorporating suitable-sized nanoparticles into the organic phase of interfacial polymerization to form a nanomaterial-polyamide (PA) selective layer is a promising approach to enhancing membrane performance. In this work, we prepared novel thin-film nanocomposite (TFN) membranes by modifying the PA layer with acyl chloride@MoS 2 nanoparticles. The nanoparticles added in the organic phase could obviously restrict the diffusion of piperazine monomers to the reaction zone during the interfacial polymerization process, demonstrated by both experiment results and molecular dynamics simulation. Compared to the thin-film composite (TFC) control membrane, the TFN membranes possessed a looser PA layer as well as a rougher and more hydrophilic surface with more negative charges, confirming the significant effects of the incorporated acyl chloride@MoS 2 nanoparticles on the PA layer formation. The optimal TFN membrane achieved a high Na 2 SO 4 rejection of 98.6% and a satisfying water permeance of 27.1 L m −2 h −1 bar −1 , over 2.9 times higher than that of the TFC membrane (9.3 L m −2 h −1 bar −1 ). Moreover, attributed to the chemical affinities (including covalent connection, hydrogen bonds, and electrostatic attraction) between acyl chloride groups of the nanoparticles and the PA matrix, the TFN membranes exhibited excellent long-term operation stability. The beneficial effect of grafting acyl chloride groups on the surface of MoS 2 nanoparticles was verified by the more superior membrane performance enabled by acyl chloride@MoS 2 than that achieved by original MoS 2 . This study offers a feasible strategy to improve the performance of TFN nanofiltration membranes by utilizing proper nanoparticles as organic phase additives.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xueqing Li,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
The production of hydrogen peroxide (H 2 O 2 ) from oxygen and water is an attractive route for converting solar energy into chemical energy. In order to achieve high solar-to-H 2 O 2 conversion efficiency, floral inorganic/organic (CdS/TpBpy) composite with strong oxygen absorption and S-scheme heterojunction was synthesized by simple solvothermal-hydrothermal methods. The unique flower-like structure increased the active sites and oxygen absorption. The existence of S-scheme heterojuntion facilitated the charge transfer across the built-in electric field. Without sacrificial reagents or stabilizers, the optimal CdS/TpBpy had a higher H 2 O 2 production (3600 µmol g -1 h −1 ), which was 2.4 and 25.6 times than those of TpBpy and CdS , respectively. Meanwhile, CdS/TpBpy inhibited the H 2 O 2 decomposition, thus increasing the overall output. Furthermore, a series of experiments and calculations were carried out to verify the photocatalytic mechanism. This work demonstrates a modification method to improve the photocatalytic activity of hybrid composites, and shows potential applications in energy conversion.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 25
·17362-17369
·
IF 3.9
Zhe Zhang,Fanhao Kong,Bizhen Yuan,Yinnian Liao,Xiue Ren,Yu Hou
Solar-driven CO2 reduction into fuels and sustainable energy has attracted increasing attention around the world. However, the photoreduction efficiency remains low due to the low efficiency of separation of electron–hole pairs and high thermal stability of CO2. In this work, we prepared a CdO decorated CdS nanorod for visible light driven CO2 reduction. The introduction of CdO facilitates the photoinduced charge carrier separation and transfer and acts as an active site for adsorption and activation of CO2 molecules. Compared with pristine CdS, CdO/CdS exhibits a nearly 5-fold higher CO generation rate (1.26 mmol g−1 h−1). In situ FT-IR experiments indicated that CO2 reduction on CdO/CdS may follow a COOH* pathway. This study reports the pivotal effect of CdO on photogenerated carrier transfer in photocatalysis and on CO2 adsorption, which provides a facile way to enhance photocatalytic efficiency.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuelong Xu,Jingyue Wang,Shasha Wang,Zuozhao Zhai,Bin Ren,Zhi Tian,Lihui Zhang,Zhenfa Liu
Multifunctional electrocatalysts are desirable for overall water splitting and zinc-air batteries. In this work, N, S co-doped carbon nanotubes (CNT-NS) with a plentiful of defects were obtained through a novel molecular-level codoped and lattice defect construction method. Thiamine hydrochloride and thiocarbamide were adopted as new precursors in situ doping N and S into multi-walled CNTs surfaces, and lattice defects were constructed by in situ chemical etching using ammonium chloride and ammonium bicarbonate . These surface defects and N,S biatom co-doping synergistic effects can accumulate the CNT-NS to exhibit the superior behavior for electrocatalysis of water splitting and zinc-air batteries. The overpotential for overall water splitting was 1.61 V and the specific capacity for zinc-air batteries was 781 mA h g −1 , which was superior to previous works. According to the Operando Raman spectroscopy measurements, the S atoms can serve as the intrinsic catalytic sites for HER and OER , and the defective CNT structures could enhance the catalytic kinetics by the electron-transfer process. Further, density functional theory (DFT) results also indicated the contribution of binary atoms co-doping for low ΔG H∗ values. Therefore, this work provides the valuable reference for rational design/construction for metal-free catalysts of overall water splitting.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）