INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Chenmei Gao,Yu Xie,Yong Chen,Yun Ling,Yongcun Ma,Yifan Zhang,Yi Shao
One of the major challenges in photocatalytic hydrogen production is to improve the separation efficiency of photo-generated carriers. Therefore, we prepared ZIS/BMO heterojunctions by hydrothermal method to promote the directional separation of photogenerated carriers. A series of characterization results show that the successful preparation of heterojunctions substantially increases the separation and transfer rate of photogenerated carriers. 11% ZIS/BMO had the highest photocatalytic hydrogen production performance reached 1502.6 μmol/g/h, which is 2.78 times than ZIS monomer . Simple construction of heterojunctions but dramatic improvement of photocatalytic hydrogen production performance opens up new horizons for photocatalyst modification.
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
高影响因子
DALTON TRANSACTIONS
·
2024
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IF 3.5
Hanbing Wang,Yunqi Ning,Qi Tang,Xueyang Li,Mengdi Hao,Qun Wei,Tingting Zhao,Daqi Lv,Hongwei Tian
The layered perovskite lanthanum titanate (La2Ti2O7) is a good photocatalytic material owing to its high stability, strong redox ability, and non-toxicity. However, its inherent wide bandgap limits its application in photocatalytic hydrogen evolution. Therefore, combining La2Ti2O7 with two-dimensional (2D) narrow-bandgap semiconductors to form a 2D/2D layered structures is the preferred strategy to improve its photocatalytic performance. In this study, a novel 2D/2D ZnIn2S4/La2Ti2O7 Z-scheme heterojunction was prepared through the solvothermal method. The experimental results show that when the molar ratio of La2Ti2O7 to ZnIn2S4 is 1:4, the hydrogen evolution rate of the composite under ultraviolet-visible light reaches 6.97 mmol·g1·h1, which is 3.5 times higher than that of the pure ZnIn2S4. The results of the morphological characterization of the samples and the photoelectrochemical measurements show that channels for the rapid transfer of carriers are generated by the unique 2D/2D structure of these samples, and the separation and migration efficiency of the photogenerated carriers gets significantly improved due to the formation of the Z-scheme heterojunction. This study provides useful insight into the modulation of wide-bandgap semiconductors and the research on solar energy conversion.
研究领域:
材料科学
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纳米技术
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光催化
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能源转换
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DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 3
·542
·
IF 5.719
Liqin Yang,Zhihong Chen,Xin Wang,Mingliang Jin
The practical application of photocatalytic H2-evolution is greatly limited by its sluggish charge separation, insufficient active sites, and stability of photocatalysts. Zero-dimensional (0D) Ti3C2MXene quantum dots (MQDs) and amorphous Ti(IV) have been proven to be potential substitutes for noble co-catalyst to accelerate the separation of photogenerated electron-hole pairs and prevent the self-oxidation of photocatalysts, leading to better photocatalytic H2-evolution performance with long-term stability. In this study, amorphous Ti(IV) and MQDs co-catalysts were successfully deposited on ZnIn2S4(ZIS) microspheres composed of ultra-thin nanosheets via a simple impregnation and self-assembly method (denoted as MQDs/ZIS/Ti(IV)). As expected, the optimal MQDs/ZIS/Ti(IV) sample exhibited a photocatalytic H2-evolution rate of 7.52 mmol·g−1·h−1and excellent photostability without metallic Pt as the co-catalyst in the presence of Na2S/Na2SO3as hole scavenger, about 16, 4.02 and 4.25 times higher than those of ZIS, ZIS/Ti(IV), and MQDs/ZIS, respectively. The significantly enhanced photocatalytic H2-evolution activity is attributed to the synergistic effect of the three-dimensional (3D) flower-like microsphere structure, the amorphous Ti(IV) hole co-catalyst, and a Schottky junction formed at the ZIS–MQDs interface, which offers more active sites, suppresses self-photocorrosion, and photo-generates the charge recombination of ZIS.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
DALTON TRANSACTIONS
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2020
·Vol. 49
·期 31
·10816-10823
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IF 4.174
Huihui Song,Na Wang,Hao Meng,Yide Han,Junbiao Wu,Junli Xu,Yan Xu,Xia Zhang,Ting Sun
A facile synthetic route, by using rhombic dodecahedral zeolitic imidazolate framework-8 (ZIF-8) as the structure template, is devoted to fabricating the ZnS/ZnIn2S4 hybrid heterojunction; the compact heterostructure was produced by combining the sulfurization of ZIF-8 and the in situ precipitation of ZnIn2S4 in one pot. The resulting ZnS nanoparticles of about 100 nm were uniformly dispersed in the folds of flower-like ZnIn2S4, whose structure is beneficial for charge transfer at the heterointerface. The additional quantities of ZIF-8 are varied to find an optimum ratio of the two components to obtain the best photocatalytic activity. In the photocatalytic hydrogen generation irradiated by simulated solar light, all the ZnS/ZnIn2S4 hybrid photocatalysts displayed improved hydrogen production rates compared to single ZnS or ZnIn2S4, and the best hydrogen production rate of 453.4 μmol h−1 g−1 is obtained by ZnS/ZIS-20, whose value is approximately 4 times higher than that of single ZnIn2S4. The electrochemical properties of the ZnS/ZnIn2S4 hybrid photocatalysts were measured to explore the charge transfer mode at the interface, and the band structure and enhanced photocatalytic hydrogen generation mechanism have been proposed. The excellent recycling properties of hydrogen production indicated the prospective applications of this kind of ZIF-derived metal sulfide in photocatalytic reactions.
研究领域:
材料科学
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光催化
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yong Tang,Jianhao Qiu,Dingliang Dai,Guanglu Xia,Biyao Fang,Yixin Li,Jianfeng Yao
Defect engineering is used in the development of photocatalysts and has received widespread attention for achieving efficient photocatalysis. Here, ZnIn 2 S 4 with rich sulfur vacancies (V S -ZnIn 2 S 4 ) was integrated with MIL-53-NH 2 for photocatalytic H 2 O 2 production from O 2 reduction under visible light. The sulfur vacancy could effectively promote charge separation and O 2 capture, and the heterostructure between ZnIn 2 S 4 and MIL-53-NH 2 further inhibits charge recombination, which promises highly boosted photocatalytic activities. In ambient air and pure water, V S -ZnIn 2 S 4 /MIL-53-NH 2 heterostructures exhibit superior photocatalytic H 2 O 2 production performance (705 μmol·L −1 ) relative to those of monomeric Znln 2 S 4 (78 μmol·L −1 ), V S -Znln 2 S 4 (210 μmol·L −1 ), MIL-53-NH 2 (38 μmol·L −1 ), as well as ZnIn 2 S 4 /MIL-53-NH 2 (395 μmol·L −1 ). Mechanistic studies have confirmed that the main pathway for H 2 O 2 formation on V S -ZnIn 2 S 4 /MIL-53-NH 2 is ⋅O 2 – -triggered O 2 reduction, and sulfur vacancy can adsorb and activate O 2 to facilitate the production of ⋅O 2 – . This study provides new insights into catalyst design and green synthesis of H 2 O 2 .
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Ning Li,Jiafeng Ma,Wenlong Wang,Qing Chang,Lei Liu,Caihong Hao,Huinian Zhang,Huayang Zhang,Shengliang Hu,Shaobin Wang
The layered chalcogenide ZnIn 2 S 4 (ZIS) exhibits photo-stability and a tunable band gap but is limited in photocatalytic applications, such as hydrogen (H 2 ) production, due to rapid carrier recombination and slow charge separation. To overcome these limitations, we have synthesized a ternary MoS 2 /ZIS/graphene quantum dots (GQDs) heterojunction, wherein MoS 2 and GQDs are strategically attached to ZIS interlaced nanoflakes, enhancing light absorption across the 500–1500 nm range. This heterojunction benefits from dual S-scheme interfaces between MoS 2 -ZIS and ZIS-GQDs, establishing directed internal electric fields (IEFs). These IEFs accelerate the transfer of photoinduced electrons from the conduction bands of MoS 2 and GQDs to the valence band of ZIS, promoting rapid recombination with holes and facilitating efficient catalytic reactions with plentiful photoinduced electrons stemmed from the conduction band of ZIS. As a result, the photocatalytic H 2 production rate of the MoS 2 /ZIS/GQDs heterojunction is measured at 21.63 mmol h −1 g −1 , marking an increase of 36.7 times over pure ZIS. This research provides valuable insights into designing novel heterojunctions for improved charge separation and transfer for solar energy conversion applications.
研究领域:
材料科学
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能源转换技术
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光催化研究
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Fangfang Cai,Xia Hu,Faliang Gou,Yuyuan Chen,Yulu Xu,Chenze Qi,De-Kun Ma
Ternary ZnIn 2 S 4 (ZIS) is a kind of potential electrocatalyst for CO 2 reduction reaction (CO 2 RR). However, the reported reduction products are usual C1 species. Considering that N doped carbon can increase adsorption of CO 2 molecules, facilitate electron transfer, and activate active sites, here ultrathin ZIS nanosheet arrays (ZIS NSAs) grown on N doped carbon cloth (NDCC) were synthesized through a facile hydrothermal route. The as-synthesized ZIS NSAs/NDCC enabled electrocatalytic CO 2 RR toward ethanol with the highest 42 % faradaic efficiency (FE) at an applied potential of − 0.7 V versus the reversible hydrogen electrode (RHE) in CO 2 -saturated 0.5 M KHCO 3 aqueous solution. This is first report on ZIS-based electrocatalyst for electrocatalytic CO 2 RR toward ethanol production. The experimental results and density functional theory (DFT) calculations showed that NDCC could enhance the CO 2 RR activity and promote CO-CO coupling process. Our work not only provides a new electrocatalyst for CO 2 RR to ethanol but also stresses the influence of N doped carbon substrate and bimetallic effect on electrocatalytic CO 2 RR.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Journal of Composites Science
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2023
·Vol. 7
·期 7
·280
·
IF 3.3
Ge-Ge Zheng,Xin Lin,Zhen-Xing Wen,Yu-Hao Ding,Rui-Hui Yun,Gaurav Sharma,Amit Kumar,Florian J. Stadler
Photocatalytic degradation plays a crucial role in wastewater treatment, and the key to achieving high efficiency is to develop photocatalytic systems that possess excellent light absorption, carrier separation efficiency, and surface-active sites. Among various photocatalytic systems, S-type heterojunctions have shown remarkable potential for efficient degradation. This work delves into the construction of S-type heterojunctions of ternary indium metal sulfide and bismuth ferrite nanofibers with the introduction of sulfur vacancy defects and morphology modifications to enhance the photocatalytic degradation performance. Through the impregnation method, BiFeO3/ZnIn2S4heterojunction materials were synthesized and optimized. The 30% BiFeO3/ZnIn2S4heterojunction exhibited superior photocatalytic performance with higher sulfur vacancy concentration than ZnIn2S4. The in-situ XPS results demonstrate that the electrons between ZnIn2S4and BFO are transferred via the S-Scheme, and after modification, ZnIn2S4has a more favorable surface morphology for electron transport, and its flower-like structure interacts with the nanofibers of BFO, which has a further enhancement of the reaction efficiency for degrading pollutants. This exceptional material demonstrated a remarkable 99% degradation of Evans blue within 45 min and a significant 68% degradation of ciprofloxacin within 90 min. This work provides a feasible idea for developing photocatalysts to deal with the problem of polluted water resources under practical conditions.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
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IF 4.4
Yuhan Xie,Ke Zhang,Boyu Dong,Ranran Xu,Jinxi Chen,Yongbing Lou
A well-designed composite based on semiconductor materials can effectively reduce the recombination of photo-generated carriers in photocatalysts by establishing efficient charge transfer channels, which enhances the activity of photocatalytic hydrogen evolution for water splitting. Herein, a ZnIn 2 S 4 /NiSe 2 composite with NiSe 2 nanoparticles tightly anchored on the nanosheets-assembled microspheres ZnIn 2 S 4 was elaborated and successfully synthesized by a hot-injection method followed by a successive solvothermal method. The synergistic effects and close contact interface between ZnIn 2 S 4 and NiSe 2 facilitated charge migration. Under visible light irradiation, the optimal ratio of ZnIn 2 S 4 /NiSe 2 composite achieved an outstanding hydrogen evolution rate of 3060 µmol g −1 h −1 (nearly 12.6 times of unmodified ZnIn 2 S 4 ) and exhibited superior stability (no apparent decrease within 20 h) in the presence of a sacrificial agent (triethanolamine). Additionally, various characterizations revealed that the recombination of photo-generated carriers was effectively suppressed, visible-light absorption was significantly enhanced, and interface charge transfer was accelerated, thus endowing the ZnIn 2 S 4 /NiSe 2 composite with superior photocatalytic activity . This research provides illuminating insights into using the non-noble metal-based catalyst NiSe 2 as an effective co-catalyst, significantly improving photocatalytic performance and holding great potential in alleviating energy shortages and environmental pollution problems.
研究领域:
材料科学
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能源与环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Hao Guo,Guangyao Wang,Haiyan Li,Chenghui Xia,Bohua Dong,Lixin Cao
Photocatalytic hydrogen evolution is a reliable way to mitigate the energy crisis. In this work, ZnIn 2 S 4 , which has great development prospects, is selected as the photocatalyst for photocatalytic hydrogen evolution. At the same time, in order to improve the photocatalytic hydrogen evolution performance of ZnIn 2 S 4 , a novel high-entropy metal phosphide (HEMP) catalyst with abundant active sites was compounded with ZnIn 2 S 4 . The designed direct Z-scheme HEMP/ZnIn 2 S 4 , heterojunction demonstrated outstanding photocatalytic activity and superior stability for photocatalytic hydrogen evolution. The 10% HEMP-0/ZnIn 2 S 4 sample exhibited the best photocatalytic performance with a hydrogen evolution rate of 4630.21 μmol h −1 g −1 , which is 3.29 times higher than that of pure ZnIn 2 S 4 . The excellent photocatalytic activity could be attributed to the accelerated reaction kinetics, the accumulation of electrons and holes with strong reduction and oxidation abilities and the inhibition of photogenerated electron-hole pairs of the Z-scheme heterojunction. This work achieved the first application of high-entropy metal phosphides in the field of photocatalysis , not only offering a new strategy to optimize the photocatalytic hydrogen evolution performance of ZnIn 2 S 4 but also paving the way for the application of high-entropy materials in photocatalysis.
研究领域:
材料科学
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能源化学
·
催化科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Ning Zhang,Zhuhe Zhai,Yueru Yan,Xuejiao Feng,Shengqiang Chen,Yafei Zhao,Bing Zhang
Rationally designing heterostructured photocatalysts to expedite the separation/transfer of photoinduced electrons/holes is regarded as an exceptionally efficient and simple strategy for promoting the photocatalytic hydrogen production from water splitting. To this end, an effective photocatalyst (Co-MoS 2 /ZIS) was constructed via in-situ growth of two-dimensional (2D) ZnIn 2 S 4 (ZIS) nanosheets on 2D Co doped MoS 2 (Co-MoS 2 ) nanoplates to obtain 2D/2D heterostructure. The optimized 5 wt% 20-Co-MoS 2 /ZIS photocatalyst displays a remarkably higher photocatalytic water splitting performance with hydrogen generation rate of 2405.34 μmol g -1 h −1 than that of pure ZIS (419.69 μmol g -1 h −1 ). Additionally, it also demonstrates good stability and reusability with unconspicuous and insignificant decrease of activity after eight cycles and 24 h. The improved photocatalytic hydrogen production performance may be attributed to the extraordinary heterostructure of Co-MoS 2 /ZIS, the doping of Co in MoS 2 and the thick/flat surface of Co-MoS 2 , which provide large close contact interface and plentiful active sites, and prevent the aggregation of ZIS and Co-MoS 2 , thus shortening the transport distance, improving the light absorption and accelerating the separation/transfer of the photoinduced electrons/holes. This work offers a rational and feasible method for coupling 2D ZIS nanosheets with other 2D nanoplates for enhanced photocatalytic hydrogen generation from water splitting.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 14
·期 3
·590-597
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IF 5
Guanglu Xia,Jianhao Qiu,Dingliang Dai,Yong Tang,Zhonghao Wu,Jianfeng Yao
A covalent organic framework (COF) named TpPa-1 was co-modified by chlorine grafting and ZnIn2S4 integration for concurrent photocatalytic H2O2 generation and wastewater purification under visible light. The introduction of electron-withdrawing chlorine groups on TpPa-1 decreases the density of adjacent electron clouds, which promotes the charge carrier separation and the intimate combination with ZnIn2S4 by Cl–Zn/Cl–In bonds, providing an appreciably enhanced photocatalytic activity. Specifically, in pure water, the optimal ZnIn2S4/TpPa-Cl2 sample can achieve a H2O2 yield of 766 μmol L−1, which is 1.5, 2, 7.8 and 5 times those of ZnIn2S4/TpPa-1, TpPa-Cl2, ZnIn2S4 and TpPa-1, respectively. In the tetracycline solution, 95% of tetracycline was degraded and, concomitantly, H2O2 with a yield of 846 μmol L−1 was generated. It is found that H2O2 generation undergoes a two-step O2 reduction with ·O2− as the intermediate, while ·O2−, holes and ·OH are the active species in tetracycline degradation. Likewise, other common pollutants like o-nitrophenol, acid golden yellow and acid red in wastewater could also be effectively degraded along with the appreciable production of H2O2, which realizes the so-called wastewater valorization. This study could advance COF-based photocatalysts and provide a novel insight into wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）