Inorganic Chemistry Frontiers
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2024
·Vol. 11
·期 23
·8383-8391
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IF 6.1
Chen Zhang,Gao Xu,Qifeng Liang,Li Liang,Zebo Fang,Rong Wu,Shunhang Wei,Lei Wang,Xiaoxiang Xu
ZnIn2S4 nanosheets with tunable concentration of dual vacancies (i.e. Zn vacancy and S vacancy) were prepared and used for photocatalytic H2O2 production. Introducing dual vacancies effectively promotes exciton dissociation, facilitates O2 adsorption, and reduces the free energy of subsequent activation and protonation of adsorbed O2. These intriguing properties endow ZnIn2S4 with excellent performance for sacrificial agent-free H2O2 photosynthesis via a two-step single-electron oxygen reduction reaction pathway under AM 1.5 and visible-light irradiation. Almost double amounts of H2O2 can be produced over ZnIn2S4 with dual vacancies compared to pristine ZnIn2S4 without vacancies. Corresponding SCC efficiency and AQY at 420 ± 20 nm reached ∼0.031% and 0.34%, respectively. In addition, the abundant dual vacancies inhibit H2O2 decomposition because of enhanced hydrophilicity. This work provides a new strategy to improve the photocatalytic performance of ZnIn2S4 through defect engineering and brings new mechanistic insights into the role of these defects.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Lu Zhang,Jianhao Qiu,Dingliang Dai,Yichen Zhou,Xi Liu,Jianfeng Yao
MIL-101(Cr)@ZnIn 2 S 4 hierarchical heterojunction was delicately designed and fabricated through the in-situ growth of ZnIn 2 S 4 on MIL-101 and electrostatic self-assembly. It is affirmed that the Cr–S interface bonding between MIL-101 and ZnIn 2 S 4 in their composite was established based on the characterization results of X-ray photoelectron spectroscopy, Raman and zeta potential . Thus, a high-speed channel for charges transfer is offered due to the Cr–S bond, intimate interface contact and hierarchical structure of MIL-101@ZnIn 2 S 4 , which largely inhibits the recombination of photo-induced charge carriers and promises a remarkable photocatalytic activity . Choosing visible-light-driven reduction of Cr(VI) as a model, the optimal MIL-101@ZnIn 2 S 4 sample can reduce 95% of Cr(VI) within 30 min, corresponding to a rate constant of 0.107 min −1 , which is 2.9-fold compared with blank ZnIn 2 S 4 counterpart (MIL-101 has a negligible performance). Additionally, a conspicuous apparent quantum yield of 9.7% can be achieved at a wavelength of 420 nm. Eventually, to reinforce the practicability of MIL-101@ZnIn 2 S 4 , the composite powders were manufactured as aerogels utilizing bacterial cellulose as a substrate. The MIL-101@ZnIn 2 S 4 aerogel still exerts an enviable performance for photocatalytic reduction of Cr(VI) and stability. This work could inspire the material design and environmental remediation based on MOFs.
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
NANOTECHNOLOGY
·
2025
·Vol. 36
·期 18
·185401
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IF 2.8
Chen Zhang,Ruipeng Hou,Shufang Chang,Rong Wu,Shunhang Wei
Cocatalysts generally serve as active sites accelerating carrier separation. However, when the hydrophilicity of photocatalyst itself is poor, the trapped electrons or holes on cocatalysts are difficult to react with reactants quickly. In this work, Bi4Ti3O12 nanosheets with excellent hydrophilicity was prepared and then thermally deposited Rh on their surface (Bi4Ti3O12(Rh)), and finally in-suit grew ZnIn2S4 on the surface of Bi4Ti3O12(Rh). Based on the results of photocatalytic performance and materials characterization, it was found that the Bi4Ti3O12(Rh) in the photocatalytic system could be considered as a special cocatalyst rather than formed heterojunction with the ZnIn2S4. Under visible-light irradiation, the Rh acted as an electron trapping site to conduct photogenerated electrons trapping from ZnIn2S4 to the surface of Bi4Ti3O12. This process not only further accelerated carrier separation, but also facilitated electrons reacting with water due to the excellent hydrophilicity of Bi4Ti3O12(Rh), thereby achieving enhanced photocatalytic H2 production performance in the absence of sacrificial agents.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Sijia Liu,Xifei Zhou,Changqing Yang,Chaohai Wei,Yun Hu
The extensive use of sacrificial agents and the low carrier separation and utilization efficiency remain important factors limiting the development of photocatalytic hydrogen production . We report a three-layered, dual-functional photocatalysts of Cu atomics@UiO-66-NH 2 (U6N)/ZnIn 2 S 4 nanosheets (ZIS), for the simultaneous production of photocatalytic hydrogen and degradation of organic pollutants . When common and highly toxic organic pollutants (phenolic compounds and antibiotics) were substituted for the sacrificial agents, Cu@U6N/ZIS exhibited superior sustained hydrogen production, approximately 28 times greater than that of pure ZIS. The experimental results suggested that the window size of U6N (< organic pollutants molecular size) separates the reaction sites of organic pollutants oxidation and reduction of hydrogen ions (H + ), thereby achieving spatial separation of redox sites. Besides, the structure of Cu@U6N/ZIS, which was anchored Cu within U6N and encapsulated by ZIS nanosheets, forming Z-type heterojunctions, achieved the control of the directional transfer of photogenerated electrons. And the coupled system can effectively enhance water quality by reducing the biological toxicity of the wastewater. This study suggests new avenues for environmental restoration and non-fossil fuel production.
研究领域:
环境科学
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能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Asif Hassan Raza,Long Li,Shumail Farhan,Wenjing Fu,Yan Wu
Two dimensional (2D) photocatalytic materials are desirable to achieve synergistic charge transfer and segregation. Here, we have developed 2D ZnIn 2 S 4 nanosheet (3–4 nm) that generates more active sites for excellent photocatalytic activity. Further, we have fabricated ZnS quantum dots (QDs) and ZnS nanoparticles (NPs) embedded with ZnIn 2 S 4 nanosheet in the form of ZnS QDs/ZnIn 2 S 4 and ZnS NPs/ZnIn 2 S 4 heterostructures prepared via one step hydrothermal method. The optimal ZnS QDs/ZnIn 2 S 4 presents the hydrogen evolution rate (HER) of 4.5 mmol g −1 h −1 which was approximately 5 and 34 times higher than that of their counterparts as well as about 3 times more efficient than ZnS NPs/ZnIn 2 S 4 heterostructure. The apparent quantum efficiency (AQE) of 21.2% was observed at 350 nm. The work functions determined through Ultraviolet photoelectron spectroscopy (UPS) elaborate the charge transfer mechanism. In situ KPFM validated the surface potential difference between the ZnS QDs and ZnIn 2 S 4 interfaces estimated about 55 mV which was approximately 2 times higher than ZnS NPs/ZnIn 2 S 4 . Theoretical calculation confirms the significant reduction in Gibbs free energy about −0.6 eV. Electron paramagnetic resonance (EPR) spectra suggest the development of a novel S-scheme mechanism and provides a unique insight into the charge transfer, separation and the surface photovoltage of heterostructure photocatalysts.
研究领域:
材料科学
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化学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2020
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IF 7.216
Jingwen Pan,Gongxin Zhang,Zhongjie Guan,Qianyu Zhao,Guoqiang Li,Jianjun Yang,Qiuye Li,Zhigang Zou
Structure manipulation of photocatalysts at an atomic scale is a promising way to improve its photocatalytic performance. Herein, we realize the anchoring of single Ni atoms on the ZnIn 2 S 4 nanosheets with rich sulfur vacancies. Experimental results demonstrate that single Ni atoms induce the formation of Ni-O-M (Zn/In) atomic interface, which can efficiently promote the carriers separation and prolong the carrier life time. In addition, in situ electron spin resonance spectroscopy (ESR) confirms that the single Ni atoms act as an electron trapping center for protons reduction. As a result, the single Ni atoms decorated ZnIn 2 S 4 nanosheets with rich sulfur vacancies (Ni/ZnIn 2 S 4 -RV s ) shows a hydrogen evolution rate up to 89.4 μmol h −1 , almost 5.7 and 2.3 times higher compared to that of ZnIn 2 S 4 nanosheets with poor sulfur vacancies and rich sulfur vacancies (denoted as ZnIn 2 S 4 -PV s and ZnIn 2 S 4 -RV s ). This work opens up a new perspective manipulating the single-atom cocatalyst and sulfur vacancy on sulfide supports for improving photocatalytic hydrogen evolution.
研究领域:
材料科学
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光催化
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Hongjie Liu,Jiarong Xv,Liwei Wang,Yixin Qian,Hao Fu,Minxuan Huang,Xiyong Chen
Constructing core-shell heterostructures can effectively improve the hindered issues such as decreased sensitivity and poor selectivity from the chemoresistive gas sensors in the complex atmosphere. Herein, an effective hydrothermal-water bath treatment combined strategy was designed to obtain the unique ethanol adsorption preferred ZnIn 2 S 4 sheet shell/In 2 O 3 sphere core (ZnIn 2 S 4 @In 2 O 3 ) nanosphere (NS) heterostructures. Particularly, according to the characterization and gas sensing test results, the chemoresistive sensor of ZnIn 2 S 4 @In 2 O 3 NS-2 with the highest chemisorbed oxygen concentration shows satisfactory selectivity to ethanol vapor, and the response is the highest (54) compared to other composite controls, which is almost 4-fold of that of the pure In 2 O 3 NS reference. Besides, the relatively lower working temperature (220 °C), low limit of detection (LOD, 30 ppb) and long-term stability were also obtained. The enhanced performance of the core-shell ZnIn 2 S 4 @In 2 O 3 NS-2 based sensor may be due to the synergistic effect between ZnIn 2 S 4 sheets and In 2 O 3 sphere moieties. Meanwhile, the large specific surface area from the outer shell of ZnIn 2 S 4 sheets is also another contribution factor, which supplies the most chemisorbed oxygen sites and transportation channels to promote the interfacial gas diffusion, catalytic oxidation and product desorption.
研究领域:
材料科学
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化学传感
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 4
·400
·
IF 4.501
Sujuan Hu,Li Jin,Wangyu Si,Baoling Wang,Mingshan Zhu
Vacancies engineering based on semiconductors is an effective method to enhance photoelectrochemical activity. Herein, we used a facile one-step solvothermal method to prepare sulfur vacancies modified ultrathin two-dimensional (2D) ZnIn2S4nanosheets. The photon-to-current efficiency of sulfur vacancies modified ultrathin 2D ZnIn2S4nanosheets is 1.82-fold than ZnIn2S4nanosheets without sulfur vacancies and 2.04-fold than multilayer ZnIn2S4. The better performances can be attributed to the introduced sulfur vacancies in ZnIn2S4, which influence the electronic structure of ZnIn2S4to absorb more visible light and act as the electrons trapping sites to suppress the recombination of photo-generated carriers. These results provide a new route to designing efficient photocatalyst by introducing sulfur vacancies.Keywords:ZnIn2S4nanosheets;sulfur vacancies;vacancies engineering;photoelectrocatalysts;photoelectrochemical performance
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22453-22467
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IF 14.511
Huihua Luo,Lianqing Yu,Kehui Xue,Haifeng Zhu,Yaping Zhang
Photocatalytic water splitting into value-added energy is a promising strategy to resolve the environmental pollution and energy crisis. Herein, we proposed a facile method to design a p–n heterostructure photocatalyst for highly effective and stable visible light-driven hydrogen production. Starting from a framework of metal–organic framework (MOF) derived carbonaceous material (CNCo-Fe3O4) with a spindle-like structure, we demonstrated ultrathin ZnIn2S4 (ZIS) nanosheets grown on the surface of the rich porous CNCo-Fe3O4 spindle-like structure (denoted as CNCo-Fe3O4/ZIS). The intimate coupling between CNCo-Fe3O4 and ZnIn2S4 facilitates charge transfer and inhibits the recombination of electron and hole pairs, resulting in fast reaction kinetics at the heterointerface. Furthermore, the conductivity and structural integrity of the catalysts are further enhanced by MOF-derived carbonaceous materials. Both high H2 yield (2.63 mmol g−1 h−1) and long-term stability are achieved for 5% CNCo-Fe3O4/ZIS heterostructure catalysts under visible-light irradiation (λ ≥ 420 nm), ascribed to the enhanced light absorption capacity, conductivity and charge separation ability. The designed nanoarchitecture may inspire more possibilities for the synthesis of MOF-derived carbonaceous material compositions with semiconductors for wide applications.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
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IF 6.735
Qin Li,Yang Xia,Chao Yang,Kangle Lv,Ming Lei,Mei Li
Facing the requirement of modern industrial development, selective reduction of 4-nitroaniline (4-NA) into p-phenylenediamine (PPD) via a facile, economic and eco-friendly photocatalysis technique has attracted more and more attention in recent years. In this study, ZnIn 2 S 4 (ZIS) nanosheets grew in-situ on the surface of TiO 2 hollowspheres through a hydrothermal method and formed a direct Z-scheme heterojunction composite, which exhibited exceedingly better photocatalytic 4-NA reduction performance than bare ZIS and TiO 2 . Such enhancement was mainly attributed to the dissimilar dimensionalities, intimate contact, and matchable band edge positions between ZIS and TiO 2 semiconductors. Moreover, the substantial mechanism for the photocatalytic reaction in the ZIS/TiO 2 system was reasonably proposed. Inspired by recent applications of the Z-scheme heterostructured materials in solar energy conversion and artificial photosynthesis, this work would arouse an increasing interest in designing more Z-scheme photocatalyst systems with high efficiency and extensive applications.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 15
·7195-7201
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IF 3.925
Huan Liu,Jingzhe Li,Yue Chen,Xuting Sun,Xun Xu,Lingfang Qiu,Shuwang Duo,Ping Li
One of the feasible strategies to enhance the photocatalytic properties of TiO2 is to broaden the visible light response range and accelerate the separation rate of photo-induced electron–hole (e−–h+) pairs by designing and synthesizing heterostructures using narrow-band-gap semiconductors. In this study, a ternary heterostructure based on MOF-derived TiO2 was first fabricated via the self-sacrificing template method followed by a two-step chemical bath process. The as-obtained CdS/ZnIn2S4/TiO2 ternary heterostructures exhibited better visible-light photocatalytic properties for the degradation of Rhodamine B (RhB) and tetracycline (TC) than single-component and dual-component systems. Among the ternary heterostructures, it was found that the CdS/ZnIn2S4/TiO2-II showed the highest photoreactivity of 95.3% for RhB removal and 91.8% for TC removal within 40 min. In addition, CdS/ZnIn2S4/TiO2-II could maintain its photocatalytic properties during the stability test. The improvement in photocatalytic properties is attributed to the reasonable construction of a ternary heterostructure, which significantly accelerates the separation and transport of photogenerated e−–h+ pairs, improves the specific surface area, and broadens the visible light response range. This study demonstrates a promising strategy for developing ternary heterostructures as effective photocatalysts for the degradation of organic pollutants.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 13
·1795-1802
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IF 8.683
Bojing Sun,Dingge Fan,Xiaoyu Chen,Zhenzi Li,Wei Zhou,Yuncehn Du
Visible-light-driven photocatalytic overall pure water splitting is still a challenge, especially with single-component photocatalysts. Herein, ultrathin ZnIn2S4 nanosheets with Al doping (Al-ZIS) were fabricated via a one-step solvothermal method with magnetic stirring and could realize stoichiometric H2 and O2 evolution in pure water. The introduction of Al atoms not only adjusted the electronic configuration and improved the carrier density of atomic layers but also accelerated the separation efficiency of photogenerated charge carriers due to the formation of a domain electrostatic potential difference. Moreover, the positive charge enriched Al atoms are favorable for the adsorption of H2O molecules, which greatly boost the oxygen evolution reaction (OER) process on the Al-ZIS nanosheets. As a result, the photocatalysts achieved average H2 and O2 evolution rates of 77.2 and 35.3 μmol g−1 h−1, respectively, under visible-light irradiation and an apparent quantum yield (AQE) of 1.61% at 420 nm. This study provides new insights for introducing a heteroatom strategy to prepare other high-performance single-component photocatalysts for overall water splitting.
研究领域:
材料科学
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能源化学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
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