Nanomaterials
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2019
·Vol. 9
·期 9
·1244
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IF 4.034
Haizeng Song,Han Wu,Yuan Gao,Ka Wang,Xin Su,Shancheng Yan,Yi Shi
Tin disulfide (SnS2) has gained a lot of interest in the field of converting solar energy into chemical fuels in light-assisted electrochemical water splitting due to its visible-light band gap and high electronic mobility. However, further decreasing the recombination rate of electron-hole pairs and increasing the density of active states at the valence band edge of the photoelectrodes were a critical problem. Here, we were successful in fabricating the super-thin SnS2nanostructure by a hydrothermal and solution etching method. The super-thin SnS2nanostructure as a photo-electrocatalytic material exhibited low overpotential of 0.25 V at the current density of −10 mA·cm−2and the potential remained basically unchanged after 1000 cycles in an H2SO4electrolyte solution, which was better than that of the SnS2nanosheet and SnS/SnS2heterojunction nanosheet. These results show the potential application of super-thin SnS2nanostructure in electrochemical/photo-electrocatalytic field.Keywords:layered semiconductor;solution etching;SnS2nanostructure;light-Assisted electrochemical water splitting
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Junhui Wu,Baoping Yang,Jiahao Zhou,Ming Zhong,Yong Ding,kun zhao,Ye Yuan
Triboelectric nanogenerators (TENGs) are capable of effectively scavenging ambient tiny mechanical energy and converting it into electrical energy, offering significant potential for applications in self-powered sensing and electrical energy storage systems. However, the practical utility of TENGs in high-humidity environments is severely restricted due to the detrimental effects of moisture. Herein, we have fabricated a TENG utilizing a CAU-10-(SO3H)0.08(OH)0.92/polyvinyl chloride (PVC) composite film as the negative triboelectric layer and Al foil as the positive triboelectric layer, which exhibits the ability to sustain stable output voltage and current even in highly ambient humidity conditions. At a relative humidity (RH) of 20%, the 2 wt%-CAU-10-(SO3H)0.08(OH)0.92//PVC composite film-based TENG achieved an open-circuit voltage (Voc) of 318 V, a short circuit-current (Isc) of 30 μA, a short-circuit charge transfer (Qsc) of 77 nC and a peak power of 2.69 mW. The device still maintains stable output voltage and current signals even at 90% RH. There is no obvious decline in the output voltage of the TENG after continuous working for about 36,000 operational cycles. Through a transformer and a rectifier circuit, the TENG was capable of charging a 10 mF capacitor to 2.7 V in 3.48 h, which was subsequently employed for water electrolysis to generate hydrogen. After 30 electrolysis cycles, the system produced 54 µL of H2 at a rate of 143.6 µL/h/m². This work offers a reference for the development of CAU-10-(SO3H)0.08(OH)0.92-based composites with humidity resistance, which is essential for the application of TENGs in high-humidity environments.
研究领域:
材料科学
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能源技术
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2018
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IF 11.698
Dongsheng Dai,Lu Wang,Nan Xiao,Songsong Li,Hao Xu,Shuang Liu,Boran Xu,Da Lv,Yangqing Gao,Weiyu Song,Lei Ge,Jian Liu
Efficient noble-metal-free semiconductor composite photocatalysts are highly desirable for visible light driven water splitting. In this study, Ni 2 P was successfully decorated on Zn 0.5 Cd 0.5 S as a highly efficient co-catalyst via a hydrothermal method . The chemical as well as photophysical properties of the as-obtained Ni 2 P/Zn 0.5 Cd 0.5 S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV–vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) and time-resolved fluorescence. The Ni 2 P/ Zn 0.5 Cd 0.5 S composite sample with 4% molar content of Ni 2 P showed the highest photocatalytic H 2 evolution activity with a corresponding H 2 evolution rate of 1173 μmol h −1 , which was about 13 times higher than that of pure Zn 0.5 Cd 0.5 S sample under visible light irradiation. The photocatalytic activity of the Ni 2 P/Zn 0.5 Cd 0.5 S composite sample was stable even after 4 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of the Ni 2 P/Zn 0.5 Cd 0.5 S composite sample was systematically investigated, which can provide a novel concept for the synthesis of other desirable semiconductor materials with high photocatalytic performance.
研究领域:
材料科学
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光催化
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能源化学
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半导体催化
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清洁能源
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Sihan Li,Yingqing Zhan,Fei Zhu,Hongshan Jia,Jie Liu,Xinyue Duan,Xianzhang Lei
The absence of anion exchange membranes (AEMs) that concurrently exhibit high hydroxide conductivity and superior dimensional stability poses a major challenge for the advancement of a high-performance AEM-based water electrolysis system. Herein, a series of block-cross-linked poly(aryl piperidinium) AEMs were prepared via superacid polycondensation, nucleophilic substitution, and the Menshutkin reaction. The molecular configuration of poly(aryl piperidinium) was manipulated by introduction of backbone rigidity, steric hindrance, and microphase-separated structures, thus realizing the design of distinct polymer network architectures for the AEM electrolysis application. It was found that the presence of nonrotatable carbazole molecules, which enlarged the molecular space within the polymer, contributed to the distinct hydrophilic–hydrophobic microphase separation structure. Moreover, the dual “block-cross-linking” strategy not only improved the structural stability of the polymer but also optimized its ion transport properties. Notably, AEMs featuring N-ethyl carbazole structure in their backbone exhibited remarkable dimensional stability (swelling ratio of 10 %, water uptake of 17.39 %), high mechanical stability (tensile strength of 43.12 MPa), and high conductivity of 113.55 mS cm–1. Furthermore, the practical application of c-QPCTP AEMs in AEMWEs was demonstrated, achieving a current density of 607 mA cm–2 at a constant voltage of 1.6 V. In addition, the AEMs can be maintained in stable operation for 66 h at a constant current density of 250 mA cm–2. Therefore, the chemical design in this work provides an alternative pathway to balance the dimensional stability and OH– conductivity of AEMs in the application of AEM-based electrolysis.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Dongsheng Dai,Hao Xu,Lei Ge,Changcun Han,Yangqin Gao,Songsong Li,Yan Lu
The generation of hydrogen (H 2 ) through photocatalytic water splitting with the employment of various co-catalysts has attracted much attention. In this study, the CoP was successfully decorated on Zn 0.5 Cd 0.5 S as a highly efficient co-catalyst via a two-step in-situ chemical deposition method. The chemical as well as photophysical properties of the as-obtained CoP/Zn 0.5 Cd 0.5 S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV–vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPV). The CoP/Zn 0.5 Cd 0.5 S composite sample with 5% molar content showed the highest photocatalytic H 2 evolution activity with a corresponding H 2 evolution rate of 734 umol h −1 , which was about 20 times higher than that of pure Zn 0.5 Cd 0.5 S sample and 2 times higher than Pt loaded Zn 0.5 Cd 0.5 S sample under visible light irradiation. The photocatalytic activity of the CoP/Zn 0.5 Cd 0.5 S composite sample was stable even after 4 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of CoP was systematically investigated, which can provide a novel concept for the synthesis of other desirable photocatalytic materials with high photocatalytic performance.
研究领域:
材料科学
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光催化
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能源化学
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纳米材料
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半导体催化
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太阳能转化
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氢能
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Boan Cui,Jiahao Zhao,Yuanyuan Liu,Gangqiang Wu,Jinlong Cui
Si-based hydrolysis hydrogen production is considered a promising green hydrogen generation technology due to its ability to rapidly release hydrogen under ambient temperature and pressure, with non-toxic and pollution-free reaction products. However, the intrinsic chemical inertness of silicon and the rapid formation of a dense SiO 2 passivation layer on its surface in aqueous environments severely hinder its reaction with water, thereby limiting the hydrolysis reaction rate and hydrogen production efficiency. In this work, waste silicon powder was mixed with calcium hydride (CaH 2 ) via ball milling to prepare Si/CaH 2 composite materials. The key factors influencing their hydrolysis performance were investigated by varying the ball milling time and hydrolysis conditions. The Si/CaH 2 @15h sample exhibited a high hydrogen yield of 1049 mL/g and an impressive hydrogen generation efficiency of 91.06 % when hydrolyzed in 0.5 M NaF solution. This composite material also demonstrated excellent hydrogen generation performance in fuel cell testing, achieving effective hydrogen-to-electricity conversion. This study provides a new approach for Si-based hydrolysis hydrogen production and photovoltaic resource recycling, offering a scalable method for fuel cell applications.
研究领域:
材料科学
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能源化学
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环境工程
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可再生能源
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氢能技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Xu Guan,Zheng Zhou,Ping Luo,Fengshun Wu,Shijie Dong
Al-rich alloys prepared by milling and melting were characterized by a range of instrumental analysis techniques and employed for hydrolytic hydrogen production. The hydrolysis reaction of each Al-rich alloy with water was measured. The hydrolysis properties of Al-rich alloys prepared by milling method were superior to those prepared by melting method with same composition. In particular, the Al-5wt%Ga-3wt%In-5wt%Sn alloy prepared by milling featured better hydrolysis properties than that obtained by melting, achieving a hydrogen yield of 1146.0 mL g −1 and a maximum hydrogen generation rate of 840.0 mL min −1 g −1 in tap water within 10 min at 25 °C and atmospheric pressure. Moreover, the phase compositions, chemical states, elemental distributions, and thermal behaviors of melting and milling samples were investigated, and the activation mechanism was discussed as well.
研究领域:
材料科学
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化学工程
·
能源材料
✓ 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）