Catalysis Science & Technology
·
2021
·Vol. 11
·期 8
·2753-2761
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IF 6.119
Jingyi Jin,Yanren Cao,Ting Feng,Yanxin Li,Ruonan Wang,Kaili Zhao,Wei Wang,Bohua Dong,Lixin Cao
Noble metal Pt as an efficient cocatalyst is widely utilized in the photocatalytic hydrogen (H2) evolution field while its application is restricted by high price and scarcity. Herein, a feasible strategy for depositing a non-noble bimetallic cocatalyst on a ZnIn2S4 surface has been put forward. The low-cost and earth-abundant CuNi bimetal cocatalyst was deposited via a simple one-step photoreduction method. In this novel photocatalytic system, CuNi bimetal served as dual active sites which can inhibit the recombination of charge carriers on ZnIn2S4. Compared with single Cu or Ni deposited ZnIn2S4 samples, CuNi bimetal decorated samples showed a significant enhancement in hydrogen evolution activity. Meanwhile, 12% Cu2Ni1–ZIS realized the highest hydrogen generation rate (7825 μmol h−1 g−1, AQE = 30.19%, λ > 420 nm). The enhanced photocatalytic performance can be attributed to the spillover effect of H atoms from Ni to Cu and the synergistic effect between the metals. This work provides a novel strategy for optimizing the H2 evolution performance of a ZnIn2S4-based photocatalyst by utilizing a non-noble bimetallic cocatalyst as dual active sites.
研究领域:
材料科学
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催化
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可再生能源
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DOI
高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 4
·933-942
·
IF 3.9
Meng-Yuan Zhu,Feng-Jun Zhang,Ying-Rui Wang,Ze-da Meng,Chao-qun Mi
Transition metal sulfides are widely used in visible photocatalysis due to their suitable forbidden band widths. In this work, square platform Cu2MoS4/lamellar ZnIn2S4 composites were successfully prepared by solvent thermal and self-assembly methods. The crystalline shape, microstructure and optoelectronic properties of the composites were explored by XRD, SEM, TEM, XPS, and photocatalytic hydrogen evolution performance experiments. The results show that the absorption of the composite material in the visible region is significantly enhanced compared with that of the pure sample, and the specific surface area reaches 58.39 m2 g−1, which is about 3 times that of pure Cu2MoS4, providing more reaction adsorption sites. Photocatalytic hydrogen evolution experiments show that the best performance was achieved when Cu2MoS4 : ZnIn2S4 = 4 : 6. Namely, the composite CMS/ZIS-2 exhibited the highest hydrogen evolution performance of 3104.25 μmol h−1 g−1, which was about 434 and 13 times higher than the pure Cu2MoS4 and ZnIn2S4 photocatalytic performance, respectively. The improved performance is mainly attributed to the loading of lamellar ZnIn2S4 on the surface of Cu2MoS4, which organically combine to form a heterojunction, enhancing the light absorption in the visible region and suppressing the complexation of photogenerated carriers, thus improving the photocatalytic hydrogen evolution efficiency.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chao Peng,Yiming Chen,Xingyue Gao,Ping Wei,Yihao Lin,Li Fu,Bingpu Zhou,Mengchen Zhang,Jianbo Jia,Tiangang Luan
In this study, leveraging the tunable surface groups of MXene , the two-dimensional (2D) Nb 2 C T x with OH terminal (NC) was synthesized. 2D ZnIn 2 S 4 (ZIS) nanosheets were prepared with the aid of sodium citrate, enhancing the exposure ratio of active (1 1 0) facet. On this basis, 2D/2D ZnIn 2 S 4 /Nb 2 C T x heterojunctions were fabricated to improve photocatalytic hydrogen evolution reaction (HER) performance. The optimized 6 wt%Nb 2 C T x /ZnIn 2 S 4 -450 (6NC/ZIS-450) photocatalyt exhibits a remarkable HER rate of 3603 μmol g −1 h −1 , which is 10 times superior to that of the original ZnIn 2 S 4 . Its apparent quantum efficiency (AQE) at 380 nm reaches 14.9 %. Meanwhile, even after 5 rounds of HER, the activity of 2D/2D ZnIn 2 S 4 /Nb 2 C T x heterojunction remained at 90 %, far superior to that of pure ZnIn 2 S 4 (34 % and 31 %). Energy band structure analysis and density functional theory (DFT) calculation indicate that Nb 2 C T x adsorbed with OH exhibit a low work function . By serving as a hole cocatalyst, it effectively boosts the photocatalytic HER rate of ZnIn 2 S 4 /Nb 2 C T x heterojunction and inhibits the photocorrosion of ZnIn 2 S 4 . This unique insight, via hole transport highways and increased exposure of active facets, effectively enhances the activity and stability of sulfides photocatalysts .
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
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Guiyun Yu,Yulong Zhang,Xinyi Du,Jiaxin Wu,Chao Liu,Zhigang Zou
Coupling with bimetallic nanoparticles (NPs) has been considered as a promising strategy to enhance photocatalytic hydrogen evolution (PHE) efficiency of semiconductor photocatalysts and simultaneously minimize the use of expensive noble metals. Herein, we firstly synthesized spherical-like ZnIn 2 S 4 (ZIS) by a solvothermal method, and then combined with nickel/palladium (denoted as NiPd) bimetallic NPs to form NiPd bimetal/ZIS Schottky heterojunction. The chemical states of NiPd NPs were confirmed in the form of NiPd bimetal rather than Ni–Pd alloy. The detailed characterization results demonstrated that the deposition of NiPd bimetal played a major role in increasing light harvesting capacity, accelerating charge carrier (electrons and holes) separation and facilitating photogenerated electrons transfer, leading to the boosted PHE performance in NiPd-ZIS photocatalysts. By adjusting Ni:Pd molar ratio in Ni x Pd y -ZIS photocatalysts, the desired sample of Ni3Pd7-ZIS exhibited the highest PHE efficiency (106.6 µmol/h) and apparent quantum yield (AQY) value of 40.22% at 400 nm under visible light as compared to ZIS, Ni-ZIS and Pd-ZIS. The multiple techniques were performed to deeply investigate the photogenerated charge carrier separation, transfer and recombination. The possible mechanism over Ni3Pd7-ZIS sample for boosting PHE performance was presented based on characterization results. On the whole, this work would provide some insights into the development of cost-effective and high-efficiency bimetallic cocatalyst-based photocatalysts.
研究领域:
材料科学
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光催化
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2013
·Vol. 15
·期 37
·15660-15668
·
IF 3.829
Jungang Hou,Chao Yang,Huijie Cheng,Zheng Wang,Shuqiang Jiao,Hongmin Zhu
Highly efficient hydrogen production can be achieved by three-dimensional (3D) architectures of CdS quantum dots (QDs) incorporated in the porous assembly of marigold-like ZnIn2S4 heterostructures coupled with graphene, leading to an efficient electron transfer between them and the enhancement of the ZnIn2S4 photostability. The as-prepared samples were characterized by X-ray diffraction, electron microscopy, Brunauer–Emmett–Teller analysis, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance absorption spectra, and photoluminescence spectra. Especially, 3 wt% CdS QDs decorated ZnIn2S4 heteroarchitectures showed a high rate of H2-production at 1.9 mmol h−1, more 2.7 times than that of ZnIn2S4. The rate was further increased to 2.7 mmol h−1 with a high quantum efficiency of 56% using the 3 wt% CdS QDs decorated ZnIn2S4 composites coupled with 1 wt% graphene (about 4 times higher than that of the pure ZnIn2S4). Moreover, the CdS QDs/graphene/ZnIn2S4 exhibited strong durability due to the high hydrothermal stability of the flower-like structure and the inhibition of CdS leaching owing to its strong interaction with ZnIn2S4. The excellent photocatalytic performance is ascribed to the enhanced light absorption and the improved separation of photogenerated carriers. This finding highlights the validity of 3D semiconductor heterostructures as effective building blocks for exploring efficient visible-light-active photocatalysts.
研究领域:
材料科学
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光催化
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纳米材料
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能源化学
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半导体物理
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yining Zhang,Mengyang Xu,Weiqiang Zhou,Xianghai Song,Xin Liu,Jisheng Zhang,Songtao Chen,Pengwei Huo
Step-scheme (S-scheme) heterojunctions can efficiently promote the separation of photogenerated carriers while maintaining the strong oxidation/reduction ability of photocatalysts; thus, research attention on S-scheme heterojunctions is increasing year by year. In this study, the S-scheme ZnO@ZnIn 2 S 4 (ZnO@ZIS) heterojunction was prepared successfully. Then, electron spin resonance (ESR) characterization was applied to prove the successful construction of the S-scheme heterojunction. Photoluminescence (PL), time-resolved photoluminescence (TRPL), and photoelectrochemical experiments have demonstrated efficient interfacial charge transport in ZnO@ZIS. Finally, the mechanism of CO 2 activation and electron transport was investigated by in situ Fourier transform infrared spectroscopy (FT-IR) and discrete Fourier transform (DFT) calculation analysis. The 40-ZnO@ZIS composite showed the best activity under light, and its CO and CH 4 yields reached 39.76 and 3.92 μmol∙g −1 ∙h −1 , respectively. This study provides a solution for optimizing the photocatalytic reduction activity of semiconductor photocatalysts by constructing S-scheme heterojunction materials to improve the CO 2 reduction capacity.
研究领域:
材料科学
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环境科学
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物理化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
·
IF 1.901
Ruijie Yang,Jiansheng He,Kelin Song,Yingying Fan,Fei Tian,Rongshu Zhu
Different graphene size can affect the catalytic activity of the photocatalyst. In this work, a series of ZnIn 2 S 4 /graphene catalysts with different graphene sizes were synthesized, characterized and their photocatalytic activities were evaluated by photocatalytic hydrogen evolution. The different sizes (k) of graphene can be separated by differential centrifugation, with the decrease of graphene size, the activity of hydrogen production of the catalyst under visible light increases first and then decreases, when k = 5–7 μm, the maximum hydrogen production rate was 40.85 μmol/g·h. Furthermore, the relationship between the photocatalytic hydrogen production activity of ZnIn 2 S 4 /graphene and its physicochemical properties were further analyzed.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Materials Reports: Energy
·
2023
·
IF 0
Xiu-Qing Qiao,Wenxuan Chen,Chen Li,Zizhao Wang,Dongfang Hou,Bojing Sun,Dong-Sheng Li
Photocatalytic water splitting on noble metal-free photocatalysts for H 2 generation is a promising but challenging approach to realize solar-to-chemical energy conversion. In this study, Mo/Mo 2 C nanoparticles anchored carbon layer (Mo/Mo 2 C@C) was obtained by a one-step in-situ phase transition approach and developed for the first time as a photothermal cocatalyst to enhance the activity of ZnIn 2 S 4 photocatalyst. Mo/Mo 2 C@C nanosheet exhibits strong absorption in the full spectrum region and excellent photo-thermal conversion ability, which generates heat to improve the reaction temperature and accelerate the reaction kinetics. Moreover, metallic Mo/Mo 2 C@C couples with ZnIn 2 S 4 to form ZnIn 2 S 4 –Mo/Mo 2 C@C Schottky junction (denoted as ZMM), which prevents the electrons back transfer and restrains the charge recombination. In addition, conductive carbon with strong interfacial interaction serves as a fast charge transport bridge. Consequently, the optimized ZMM-0.2 junction exhibits an H 2 evolution rate of 1031.07 μmol g −1 h −1 , which is 41 and 4.3 times higher than bare ZnIn 2 S 4 and ZnIn 2 S 4 –Mo 2 C, respectively. By designing novel photothermal cocatalysts, our work will provide a new guidance for designing efficient photocatalysts.
研究领域:
材料科学
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能源化学
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纳米技术
✓ 已验证
DOI
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 29
·18204-18213
·
IF 10.7
Qingsheng Zhang,Shuya Yuan,Huabing Yin,Jianjun Yang,Zhongjie Guan
The photocatalytic pure water splitting performance of photocatalysts is still restricted by the low utilization efficiency of photogenerated holes. Recent studies suggest that metal oxide clusters can efficiently abstract holes from a bulk photocatalyst via discrete energy bands. However, the decay dynamics of excited states in such a heterostructure have not been explored. Herein, ultra-small CoOx clusters decorated on ZnIn2S4 (ZIS) are prepared for pure water splitting. Experimental characterization studies confirm that CoOx clusters efficiently capture holes from ZnIn2S4, thus inhibiting charge recombination. Femtosecond transient absorption spectroscopy (fs-TAS) reveals that the lifetime of holes trapped by CoOx clusters is prolonged to 911.6 ps, enabling more opportunities to participate in the surface reaction. Moreover, density functional theory calculation suggests that the CoOx cluster is the preferential adsorption site for H2O to boost surface water oxidation. Benefiting from the above factors, the optimized CoOx/ZIS shows improved H2 and H2O2 evolution rates of 404.1 μmol g−1 h−1 and 371.9 μmol g−1 h−1 under visible light irradiation, respectively, which are about ten times higher than that of pure ZIS. The study highlights the significance of efficient hole extraction for improving photocatalytic pure water splitting performance.
研究领域:
材料科学
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光催化
·
能源转换
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产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2023
·
IF 10.9
Kezhen Lai,Fengyan Li,Ning Li,Yangqin Gao,Lei Ge
Hydrogen is an important zero-pollution green energy source with potential for alleviating environmental contamination and energy shortages. Hydrogen evolution via solar-energy-induced semiconducting water splitting is among the most environmentally friendly methods available to date. In this study, a metal–organic-framework-derived, Ni-decorated carbon nanotube (Ni-CNT) is used as a non-noble co-catalyst. This Ni-CNT is grown in situ on ZnIn 2 S 4 nanosheets using a simple one-step oil bath strategy, wherein Ni nanoparticles are wrapped around the top and cross sections of the nanotubes, preventing their agglomeration. Notably, Ni-CNT/ZnIn 2 S 4 heterostructures feature intimate contact interfaces that promote charge transfer, facilitating their use as efficient photocatalysts for hydrogen evolution. The 38Ni-CNT/ZnIn 2 S 4 sample exhibits a high H 2 production rate (12267 μmolꞏh −1 ꞏg −1 ), with an apparent quantum efficiency (AQE) of 11.3% under 420 nm monochromatic light irradiation, which is nearly 6.4 times that of pure ZnIn 2 S 4 . The results of X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) corroborate the observations on Ni-CNT/ZnIn 2 S 4 heterostructures. Electrochemical measurements reveal that the combination of the Ni-CNT and ZnIn 2 S 4 facilitates the transfer of photogenerated electrons and effectively prevents rapid recombination of photocarriers, thus improving the hydrogen evolution performance of ZnIn 2 S 4 . Electron spin resonance (ESR) results further prove that cocatalyst Ni-CNTs are beneficial for prolonging the lifetimes of ZnIn 2 S 4 photogenerated electrons, thereby achieving effective charge separation. A charge transfer pathway in the heterojunction interfaces is further explored and confirmed by density functional theory (DFT) calculations. The difference in the Fermi level energy ( E f ) contributes to both charge migration and the generation of a built-in electronic field (BEF), indicating that the energy band of ZnIn 2 S 4 bends downward, which is favorable for photogenerated electron flow from ZnIn 2 S 4 to the Ni-CNT electron acceptor. The results of planar-averaged electron density difference analysis confirm that the hot electrons are transferred from Ni nanoparticles to the CNT and then to the ZnIn 2 S 4 nanosheets, indicating the formation of a photogenerated electron transfer pathway of ZnIn 2 S 4 → CNT → Ni. Furthermore, Gibbs free energy of H* adsorption (Δ G H* ) and crystal orbital Hamilton population (COHP) analysis indicate that Ni nanoparticles can serve as active sites, promoting H 2 evolution. Thus, the present study formulates a new strategy for developing low-cost, high-efficiency, non-noble-metal co-catalysts for photocatalytic hydrogen production. Download: Download high-res image (88KB) Download: Download full-size image
研究领域:
材料科学
·
能源化学
·
环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Weilong Shi,Huachang Lv,Songliu Yuan,Hui Huang,Yang Liu,Zhenhui Kang
To design highly-effective photocatalysts including various fascinating properties of eco-friendly, visible-light response and good durability has been strongly desired in photocatalysis field. Here, we synthetised a series of different proportions of carbon dots (CDs) as an ideal cocatalyst to enhance the photocatalytic activity of ZnIn 2 S 4 microspheres in the range of visible light. Simultaneously, CDs(5)/ZnIn 2 S 4 hybrid photocatalyst exhibits the highest photocatalytic activity for degradating methyl orange (MO) (10 mg/L; 100% degradation within 40 min), which is 2.34 times higher than that of ZnIn 2 S 4 alone. Additionally, the crystalline phases, structure, specific surface area and optical properties of as-prepared samples were characterized. The mechanism of enhanced photocatalytic activity of CDs/ZnIn 2 S 4 composite was also discussed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2022
·
IF 3.407
Shuhui Yang,Kunqiang Wang,He Yu,Ying Huang,Peiyuan Guo,Chenxi Ye,He Wen,Gaotian Zhang,Dongxiang Luo,Feng Jiang,Liang Zhang
The research of waste recycling and clean energy are the key to sustainable development. To simultaneously accomplish the waste recycling and clean energy generation, carbon fibers (Fiber) prepared from the spent cigarette filters are utilized to promote the photocatalytic hydrogen evolution efficiency of a heterojunction photocatalyst. The spiral ladder morphology of Fiber supplies abundant loading sites for the ZnIn 2 S 4 /g-C3N 4 photocatalysts, allowing efficient charge separation. Detailed chemical and optical features of the samples are subsequently demonstrated by a combination of scanning electron microscopy, X-ray diffraction, Fourier transform infrared tests. X-ray photoelectron spectrum results reveal that a strong internal electric field was formed between Fiber and ZnIn 2 S 4 /g-C 3 N 4 , allowing sufficient driving force to extract the photo-generated electrons from the heterojunction photocatalyst. Gas chromatography monitors a ca . 37 % enhancement for H 2 evolution (322.41 μmol·g −1 ·h −1 ) compared with control group. This work suggests an attempt to exploit general wastes for promoting photocatalytic hydrogen evolution.
研究领域:
材料科学
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环境科学
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能源科学
✓ 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）