APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Taiping Hu,Pengfei Li,Jinfeng Zhang,Changhao Liang,Kai Dai
Cadmium sulfide (CdS) has demonstrated great promise in artificial photocataytic hydrogen (H 2 ) production. However, the serious photocorrosion hinders its effective interaction and real-life application. In this work, a typical direct Z-scheme WO 3 /CdS-diethylenetriamine (CdS-DETA) composite has been designed via facile in-situ solvothermal method, which exhibits excellent H 2 production properties in visible light region. In this system, the inorganic–organic CdS-DETA nanobelts (NBs) possess enough active sites and large surface area for the encouraging nanojunction structure information. Furthermore, we also systematically calculated energy band structure and investigated charge transfer of the WO 3 /CdS-DETA by PL and photocurrent test, the results demonstrated that the suitable band gap matching between CdS-DETA and WO 3 and high redox potential improve the separation of photogenerated holes and electrons, restraining intrinsic photocorrosion of CdS as well as improving the photocatalytic activity. 5%WO 3 /CdS-DETA presented the most outstanding H 2 evolution rate (15522 μmol g −1 h −1 ), which is twice higher than that of pure CdS-DETA. WO 3 /CdS-DETA composites also presented high stability after three recycle H 2 production experiment. Finally, direct Z-scheme photocatalytic mechanism is calculated.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Jinjun Peng,Jun Shen,Xiaohui Yu,Hua Tang,Zulfiqar,Qinqin Liu
Plasmonic nonmetal semiconductors with localized surface plasmon resonance (LSPR) effects possess extended light-response ranges and can act as highly efficient H 2 generation photocatalysts. Herein, an LSPR-enhanced 0D/2D CdS/MoO 3− x heterojunction has been synthesized by the growth of 0D CdS nanoparticles on 2D plasmonic MoO 3− x elliptical nanosheets via a simple coprecipitation method. Taking advantage of the LSPR effect of the MoO 3− x elliptical nanosheets, the light absorption of the CdS/MoO 3− x heterojunction was extended from 600 nm to the near-infrared region (1400 nm). Furthermore, the introduction of 2D plasmonic MoO 3− x elliptical nanosheets not only provided a platform for the growth of CdS nanoparticles, but also contributed to the construction of an LSPR-enhanced S-scheme structure due to the interface between the MoO 3− x and CdS, accelerating the separation of light-induced electrons and holes. Therefore, the CdS/MoO 3− x heterojunction exhibited higher photocatalytic H 2 generation activity than pristine CdS under visible light irradiation, including under 420, 450, 550, and 650 nm monochromic light, as well as improved photo-corrosion performance.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 3
·期 4
·1696-1702
·
IF 0
Zhonghui Han,Gang Chen,Chunmei Li,Yaoguang Yu,Yansong Zhou
The one-dimensional (1D) cubic Cd0.8Zn0.2S solid-solution nanowires are first prepared by the “levelling effect” of thioglycolic acid (TGA) in a solvothermal process. It exhibits the enhanced transfer and separation efficiency of carriers to improve the photocatalytic H2-production activity. TGA not only serves as the sulphur source but also plays a template medium agent role. Furthermore, no TGA selectivity for diverse solvents to prepare 1D Cd0.8Zn0.2S solid solutions suggests that it also may be extended to the preparation of other 1D metal sulphide solid solutions in diverse solvents.
研究领域:
材料科学
·
化学工程
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DOI
FUEL
·
2026
·
IF 7.8
Liujun Wang,Shufeng Lin,Junfeng Qian,Yingjun Wang,Zhe Wang,Zhonghua Sun,Zhihui Zhang,Bing Lu,Mingyang He,Zhenzhen Wang
The catalytic conversion of CO 2 into formic acid (FA) is a 100% atom economy strategy for carbon recycling, yet it remains challenging due to the need for high-performance catalysts. This study presents a well-defined single-atom Ru catalyst anchored on oxygen-deficient CeO 2 , synthesized via a facile solvothermal and calcination process followed by impregnation. The catalyst demonstrated exceptional efficiency for the selective hydrogenation of CO 2 to FA, achieving a remarkable turnover frequency (TOF) of 5719 h −1 . Experimental and characterization results revealed that oxygen vacancies (OVs) in CeO 2 significantly enhanced CO 2 adsorption and activation while stabilizing Ru species and increasing their charge density, thereby improving H 2 activation. The synergistic interaction between OVs and electronic metal-support interactions was identified as the key to the catalyst’s superior performance. This work provides valuable insights into the strategic design of heterogeneous catalysts, offering a pathway for efficient CO 2 utilization and broader applications in catalytic processes.
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2026
·
IF 9.1
Shengqu Zhang,Enli Liu,Jiaxing Liu,Xintao Feng,Yaping Jian,Yinhua Jiang,Yuanzhi Hong
The advanced photocatalytic technology with conversion of renewable solar energy to the clean hydrogen (H 2 ) and hydrogen peroxide (H 2 O 2 ) chemicals can effectively realize the national goals of “carbon emission peak & carbon neutrality”. To this end, the indium sulfide (In 2 S 3 )/zinc indium sulfide (Zn 3 In 2 S 6 ) heterojunctions with double sulfur vacancies (Vs) were successfully prepared by a feasible in-situ hydrothermal approach. The as-formed heterojunctions (denoted as Vs-ISZIS6) showed the high-performance bifunctional activities towards the both photocatalytic H 2 evolution and H 2 O 2 generation. Especially, the 10Vs-ISZIS6 sample presented the highest photocatalytic H 2 production rate (7051 μmol/h/g), which is 32.1, 2.0, 14.4, and 1.4-folds greater than that of In 2 S 3 , Zn 3 In 2 S 6 , VS-In 2 S 3 , and Vs-Zn 3 In 2 S 6 , respectively. In addition, the 20Vs-ISZIS6 heterojunction possessed the optimum concentration of H 2 O 2 production with reaching 256.4 μM under 2 h of visible-light irradiation. The boosted photocatalytic performances might be caused by the synergistic effect of the presence of Vs and the construction of heterostructure between Vs-In 2 S 3 and Vs-Zn 3 In 2 S 6 , leading to the increasing visible-light absorption and promoting the photogenerated carriers separation efficiency. As a result, the possible mechanism of improved photocatalytic performances of the Vs-ISZIS6 heterojunctions was proposed. This work offers an available avenue for developing of nanostructured heterojunctions for sustainable solar-to-chemical fuel conversion.
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121460
·
IF 7.2
Xin Wang,Rui Fang,Ruyi Meng,Ruiding Fei,Zhiping Yan
Photocatalytic hydrogen evolution reaction (HER) represents one of the key technologies for realizing renewable energy conversion and storage. However, the precise development of efficient HER photocatalysts remains a critical challenge due to rapid charge recombination. In this study, the NiS/Zn 0.5 Cd 0.5 S (NZCS-X) Schottky junctions were successfully synthesized by hydrothermal deposition of NiS nanoparticles on coral-like Zn 0.5 Cd 0.5 S nanoclusters. Under visible light irradiation, the optimal composite material achieves a hydrogen evolution rate of 104.48 mmol h −1 g −1 —over 41 and 2 times higher than that of pristine CdS (2.52 mmol h −1 g −1 ) and Zn 0.5 Cd 0.5 S (47.92 mmol h −1 g −1 ). Mechanistically, X-ray photoelectron spectroscopy (XPS) confirms the electron transfer from Zn 0.5 Cd 0.5 S to NiS. Femtosecond transient absorption (fs-TA) spectroscopy reveals that the average carrier lifetime decreases to 4.83 ps in the composite, providing direct evidence of ultrafast interfacial electron extraction. Density functional theory (DFT) calculations further demonstrate that metallic NiS acts as an electron sink to optimize the Gibbs free energy (ΔG H∗ ). This work concludes that the synergistic engineering of morphology and Schottky interfaces is a decisive strategy for designing high-performance sulfide photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xing-Liang Yin,Lei-Lei Li,Jian-Hua Jiang,Xin-Xin Du,Dong-Hui Pang,Jie Yang,Zhong-Jia Li,Yuan-Xu Wang,Xin-Yue Li,Da-Cheng Li,Jian-Min Dou
Photocatalytic H 2 evolution from water splitting offers an attractive scientific and technological method to address the energy and environmental crisis. In this study, noble-metal-free Zn 0.5 Cd 0.5 S@MoS 2 core@shell nanoheterostructures were elaborately designed and successfully synthesized. The visible-light-driven photocatalytic performance investigation shows that the Zn 0.5 Cd 0.5 S@MoS 2 exhibits a state-of-the-art H 2 evolution rate of 40.2 mmol g −1 h −1 far exceeding that of pristine Zn 0.5 Cd 0.5 S by more than 57 times. Moreover, thanks to the protection of MoS 2 shells, the Zn 0.5 Cd 0.5 S@MoS 2 can retain long-term stability in four-cycles of 24 h reactions. Furthermore, a tentative mechanism on H 2 generation was systematically investigated and proposed, which contributes to understand the enhanced photocatalytic activity of the Zn 0.5 Cd 0.5 S@MoS 2 heterostructures and may inspire the synthesis of other desirable catalytic systems.
研究领域:
材料科学
·
物理化学
·
能源化学
·
纳米催化
·
光化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Aiping Wu,Chungui Tian,Yanqing Jiao,Qing Yan,Guoyu Yang,Honggang Fu
The visible-light driven, Pt-free photocatalytic H 2 evolution (PHE) is promising for clean and sustainable H 2 production. The construction of the heterojunction structure with intimate contact and good light adsorption ability is important for realizing the high effective PHE. Here, the core-shell structured MoS 2 /CdS hybrids were constructed through “sequential two-step hydrothermal growth” route for Pt-free PHE. In the synthesis, the hierarchical flower-like MoS 2 was firstly obtained through the reaction of ammonium molybdate and excessive thiourea. Subsequently, without need of centrifugation, the cadmium acetate (Cd source) was added into the cooled MoS 2 solution directly followed by a secondary hydrothermal reaction. In the process, the Cd 2+ could react with partially S 2− in MoS 2 (substituted reaction) and with the excessive S 2− ions in solution to generate CdS, resulting in the formation of CdS shell contacted with MoS 2 core. The micro-structure of the composites (such as the thickness and morphology of CdS shell) could be tuned by changing the amount of Mo source and Cd source. In the composites, the CdS on the outside is convenient to absorb the solar light. The intimate contact of CdS and MoS 2 is beneficial to charge transfer. As a result, the MoS 2 /CdS catalyst showed high catalytic activity for PHE under visible light irradiation (λ > 420 nm). The H 2 evolution rate could reach to 775 μmol h −1 (20 mg catalyst), which is much higher than pure CdS (12 μmol h −1 ) and Pt-CdS (64 μmol h −1 ). The good activity should be related with CdS outside shell beneficial for light adsorption and intimate contact of CdS and MoS 2 for easy charge transfer. A series of experiments demonstrate that the formation of the heterojunction can effectively enhance the charge transfer ability and retard the recombination of electron-hole pairs, thus improving PHE activity and alleviating the photocorrosion of CdS component.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
可持续能源
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fengyun Su,Mengzhen Tian,Hailong Cao,Zhishuai Wang,Qiang Zhao,Haiquan Xie,Yezhen Zhang,Xiaoli Jin,Xin Li,Zhengdao Li
Semiconductor-based photocatalytic water splitting enables the conversion of abundant solar energy to green and renewable hydrogen energy. Graphitic carbon nitride (g-C 3 N 4 ) is synthesized using a straightforward method, demonstrating stable physicochemical properties and possessing an optimal bandgap, thus positioning it as a promising photocatalyst in the realm of environmental sustainability. Oxygen vacancies are extensively employed to modulate light absorption and surface properties of metal-oxide semiconductors. In this study, g-C 3 N 4 nanosheets were coupled with oxygen-deficient tungsten trioxide (WO 3-x ) to form heterojunction photocatalysts ( X -WOCN). Comprehensive material characterization results demonstrated that the constructed heterojunction extended the visible light absorption range, improved photogenerated electron-hole separation efficiency, and thus augmented photocatalytic activity . Notably, the optimum hydrogen evolution rate of 6 %-WOCN was enhanced by 5.4-fold compared to that of g-C 3 N 4 . Furthermore, we propose a Z-scheme heterojunction charge separation mechanism mediated by oxygen defects and support this mechanism through detection of surface-active substances •O 2 − and •OH. This study offers novel propositions into the function of oxygen defects in facilitating charge separation within Z-scheme heterojunction.
研究领域:
光催化
·
材料化学
·
能源科学
·
半导体物理
·
环境可持续性
·
纳米材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 47
·20561-20571
·
IF 7.139
Tianyu Ai,Jing Li,Shuai Nie,Yansheng Yin,Jinlin Lu,Shuo Bao,Ling Yan
Transition elements doping metal oxide is of great significance for developing gas sensors with high performance. To achieve this goal, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons are successfully synthesized by a facile N, N-dimethylformamide assisted hydrothermal method and characterized by several physical techniques. The morphology of α-Fe 2 O 3 is evolved by introducing Mn elements. The performance of the α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons as H 2 gas sensors are studied and compared. The Mn/α-Fe 2 O 3 -5 polyhedrons sensor exhibit the best performance at optimum operating temperature of 300 °C. The response and recovery times are 10 s/24 s for H 2 with a concentration of 200 ppm, which is much faster in contrast to those recently reported H 2 gas sensors. Furthermore, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons show abnormal n-p transition sensing behavior with the change of operating temperature. This work provides a facile method for synthesizing α-Fe 2 O 3 based sensing materials for various sensors applications.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·Vol. 42
·期 17
·12210-12219
·
IF 3.582
Tianjun Chen,Chengjie Song,Mingshan Fan,Yuanzhi Hong,Bo Hu,Longbao Yu,Weidong Shi
In this work, novel CuS/g-C 3 N 4 composite photocatalysts were successfully prepared via a simple in-situ growth method. CuS nanoparticles , with an average diameter of ca.10 nm, were well dispersed on the surface of g-C 3 N 4 , revealing that g-C 3 N 4 nanosheets were promising support for in-situ growth of nanosize materials. The CuS/g-C 3 N 4 composites exhibited highly enhanced visible light photocatalytic H 2 evolution from water-splitting compared to pure g-C 3 N 4 . The optimum photocatalytic activity of 2 wt% CuS/g-C 3 N 4 composite photocatalytic H 2 evolution was about 13.76 times higher than pure g-C 3 N 4 . The enhanced photocatalytic activity is attributed to the interfacial charge transfer (IFCT). In this system, electrons in the valence band (VB) of g-C 3 N 4 can transfer directly to CuS clusters, causing the reduction of partial CuS to Cu 2 S, which can act as an electron sink and co-catalyst to promote the separation and transfer of photo-generated electrons. The accumulated photoinduced electrons in CuS/Cu 2 S clusters could effectively reduce H + to produce H 2 . This work provides a possibility for constructing low-cost CuS as a substitute for noble metals in the photocatalytic production of H 2 via a facile method based on g-C 3 N 4 .
研究领域:
材料科学
·
光催化
·
氢能
·
纳米复合材料
·
可再生能源
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DOI
高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 148
·期 12
·3741-3749
·
IF 2.911
Ge Jianhua,Jiang Daochuan,Zhang Lei,Du Pingwu
Photocatalytic hydrogen evolution is considered as one of the promising pathways to settle the energy crises and environmental issues by utilizing solar energy. In this paper, noble-metal-free Ni 2 P was used as cocatalyst to enhance g-C 3 N 4 for photocatalytic hydrogen production under visible light irradiation (λ > 420 nm). Characterization results indicated that Ni 2 P nanoparticles were successfully loaded onto g-C 3 N 4 , which can significantly contribute to accelerate the separation and transfer of photogenerated electron. The hydrogen evolution rate reached ∼ 270 µmol h −1 g −1 and the apparent quantum yield (AQY) was ∼ 2.85% at 420 nm. Meanwhile, there is no obviously decrease of the hydrogen production rate even after 36 h under visible light illumination. In addition, the mechanism of photocatalytic hydrogen evolution was also elaborated in detail. Graphical
研究领域:
光催化
·
材料科学
·
氢能源
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）