SENSORS AND ACTUATORS B-CHEMICAL
·
2020
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IF 7.1
Jiajia Xi,Hao Wang,Bihong Zhang,Faqiong Zhao,Baizhao Zeng
A molecularly imprinted polymer/Bi 2 S 3 /ZnIn 2 S 4 /ITO sensor was fabricated and used for the photoelectrochemical detection of rutin. The Bi 2 S 3 /ZnIn 2 S 4 composite was synthesized by solvothermal method and it displayed good photoelectrochemical property because of the matched energy levels of Bi 2 S 3 and ZnIn 2 S 4 . In addition, ZnIn 2 S 4 could improve the stability of the composite and avoid photocorrosion. The photocurrent signal of the Bi 2 S 3 /ZnIn 2 S 4 composite was much larger than that of Bi 2 S 3 and ZnIn 2 S 4 under visible-light irradiation. Moreover, rutin imprinted chitosan was prepared by mixing rutin and chitosan solutions, followed by simple cross-linking reaction with glutaraldehyde at room temperature. The molecularly imprinted material was combined with Bi 2 S 3 /ZnIn 2 S 4 /ITO to construct photoelectrochemical sensor, and the resulting sensor showed a low detection limit (i.e. 0.003 μM) and a wide detection range (i.e. 0.01–100.0 μM) for rutin. It also displayed high stability and selectivity. The sensor could be used for the detection of rutin in real samples.
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CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2023
·
IF 2.2
Zhen Shi,Wei Jin,Yuhang Sun,Xu Li,Liang Mao,Xiaoyan Cai,Zaizhu Lou
The practical application of hexagonal ZnIn 2 S 4 (ZIS) as a visible-light photocatalyst for hydrogen (H 2 ) production is hindered by rapid internal charge recombination. In this study, we successfully synthesized Cu 2 CoSnS 4 (CCTS) nanocrystals and loaded them onto the surface of ZIS nanosheets to create a p-n heterojunction photocatalyst. The optimized Cu 2 CoSnS 4 /ZnIn 2 S 4 (CCTS/ZIS) heterojunction exhibited a significantly higher visible-light photocatalytic H 2 evolution rate of 4.90 mmol·g −1 ·h −1 compared to ZIS and CCTS alone. The enhanced photocatalytic efficiency was attributed to improved electron transfer and charge separation at the heterojunction interface. The formation of p-n heterojunction facilitated the accumulation of valence band electrons in ZIS and conduction band holes in CCTS, effectively suppressing the recombination of photogenerated electrons and holes. Theoretical calculations, spectroscopic, and photoelectrochemical characterizations supported the findings. This work presents a promising approach for designing efficient p-n heterojunction semiconductor photocatalysts for practical applications in visible-light-driven hydrogen evolution.
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CHINESE JOURNAL OF CATALYSIS
·
2023
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IF 16.5
You Wu,Yi Yang,Miaoli Gu,Chuanbiao Bie,Haiyan Tan,Bei Cheng,Jingsan Xu
Solar photocatalysis is a promising, green, and sustainable technique for the synthesis of H 2 O 2 . In this study, low-dimensional ZnO/ZnIn 2 S 4 S-scheme heterojunction photocatalysts are fabricated using electrostatic spinning and chemical bath deposition methods for the efficient photocatalytic production of H 2 O 2 . ZnO nanofibers loaded with 20 wt% ZnIn 2 S 4 exhibit a superior H 2 O 2 production rate of 928 μmol g −1 h −1 , which is more than four times higher than that seen in pristine hexagonal phase ZnO and ZnIn 2 S 4 . First-principles calculations and in-situ X-ray photoelectron spectroscopy reveal the charge separation and transfer mechanisms in the S-scheme heterojunction. The construction of the S-scheme heterojunction facilitates the spatial separation of charge carriers, and electrons and holes with higher redox abilities are retained. Photoelectrochemical and photoluminescence tests further show that the formation of an S-scheme heterojunction is beneficial for the separation of photoinduced charge carriers. Electrochemical tests and electron paramagnetic resonance measurements indicate that H 2 O 2 production is primarily via a two-step single-electron O 2 reduction path. This study provides a new approach for the construction of S-scheme heterojunction materials that can efficiently produce H 2 O 2 under solar irradiation.
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RARE METALS
·
2023
·Vol. 42
·期 4
·1195-1204
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IF 8.8
Dong Wei,Zhou Shi-An,Ma Yan,Chi Dian-Jun,Chen Rong,Long Hong-Ming,Chun Tie-Jun,Liu Sheng-Jun,Qian Fu-Ping,Zhang Kui
Designing a heterojunction photocatalyst to improve the separation efficiency of photogenerated electrons and holes is of great significance to improve the hydrogen production efficiency. In this work, we report a rational design to grow ZnIn 2 S 4 on Mo-MOF-derived N-doped C-coated MoO 2 (MOZIS), and it has excellent photocatalytic hydrogen production with triethanolamine (TEOA) as sacrificial agent. N-doped C improves the electron transport efficiency between MoO 2 and ZnIn 2 S 4 . The systematic study shows that MOZIS has good properties to promote the effective separation and transfer of photocatalytic charges, which is attributed to the tight contact interface and good energy band structure between MoO 2 and ZnIn 2 S 4 . The optimized nanocomposites have a high hydrogen production efficiency of 10.89 mmol·g −1 (4 h) under visible light. MOF-derived N-doped C-coated MoO 2 is an effective strategy to improve the photocatalytic hydrogen production efficiency of ZnIn 2 S 4 . Graphical abstract
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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.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Qianqian Nie,Linfeng Liu,Jiayou Liu,Mingwei Shen,Xiaoxiang Huang,Zhongchao Tan,Hesheng Yu
Bi2Fe4O9/ZnIn2S4 (BFO/ZIS) composites are synthesized by using a facile impregnation method and tested for the photocatalytic degradation of xanthate for the first time. The effects of multiple parameters, including catalyst dosage and the pH value of solution, on xanthate photodegradation are investigated systematically. Furthermore, the photocatalytic mechanisms of BFO/ZIS are proposed based on various characterizations and density functional theory calculations. Results show that the degradation efficiency of 30BFO/ZIS is 98.25% during 90 min of visible light irradiation, which is 2.63 and 2.89 times higher than that of pure ZIS and BFO, respectively. This is mainly because the type II heterojunction formed between BFO and ZIS improves the separation of photogenerated carriers. Furthermore, the xanthate photodegradation efficiency of 30BFO/ZIS decreases slightly from 98.25 to 92.86% after four cycles, indicating its excellent durability and stability. Finally, the chemical oxygen demand (COD) removal efficiency of 30BFO/ZIS is up to 81.06%, exhibiting a high degree of mineralization.
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ChemSusChem
·
2024
·
IF 7.5
Weikang Wang,Shaobin Mei,Shahid Khan,Yujue Hu,Lijuan Sun,Muhammad Adnan Qaiser,Chengzhang Zhu,Lele Wang,Qinqin Liu
Graphical A molecular-level hierarchical Znln 2 S 4 /HPW S-scheme heterojunction was prepared through one-pot hydrothermal method in this work. The obtained Znln 2 S 4 /HPW heterojunction photocatalysts indicated molecular-level interfacial contact, enhanced light absorption, and accelerated charge separation and transfer, achieving efficient overall H 2 production and benzyl alcohol oxidation with corresponding photogenerated electrons and holes, respectively. Simultaneous utilization of photogenerated electrons and holes to achieve overall redox reactions is attractive but still far from practical application. The emerging step (S)-scheme mechanism has proven to be an ideal approach to inhibit charge recombination and supply photoinduced charges with highest redox potentials. Herein, a hierarchical phosphotungstic acid (H 3 PW 12 O 40 , HPW)@Znln 2 S 4 (ZISW) heterojunction was prepared through one-pot hydrothermal method for simultaneous hydrogen (H 2 ) evolution and benzyl alcohol upgrading. The fabricated HPW-based heterojunctions indicated much enhanced visible-light absorption, promoted photogenerated charge transfer and inhibited charge recombination, owing to hierarchical architecture based on visible-light responsive Znln 2 S 4 microspheres, and S-scheme charge transfer pathway. The S-scheme mechanism was further verified by free-radical trapping electron spin resonance (ESR) spectra. Moreover, the wettability of composite heterojunction was improved by the modification of hydrophilic HPW, contributing to gaining active hydrogen (H + ) from water sustainably. The optimal ZISW-30 heterojunction photocatalyst indicated an enhanced hydrogen evolution rate of 27.59 mmol g −1 h −1 in benzyl alcohol (10 vol. %) solution under full-spectrum irradiation, along with highest benzaldehyde production rate is 8.32 mmol g −1 h −1 . This work provides a promising guideline for incorporating HPW into S-scheme heterojunctions to achieve efficient overall redox reactions.
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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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Weijie Yang,Xiao-Li Wang,Ningning Kong,Chengdong Liu,Peipei Sun,Zhiqiang Wang,Yayun Ding,Haiping Lin,Dongsheng Li,Tao Wu
Controlling charge flow direction is an effective strategy for carrier separation to improve photocatalytic performance. Herein, we create an external electric field (EEF) by chemically loading [Mo 3 S 7 ] 4+ clusters on the S-Zn side of asymmetric ZnIn 2 S 4 (ZIS) monolayers to steer the charge flow. The EEF that stems from the positively charged [Mo 3 S 7 ] 4+ clusters drives photogenerated electrons in the 2D monolayer to the S-Zn side, which are further transferred to the [Mo 3 S 7 ] 4+ clusters through the Mo–S bonds for photocatalytic hydrogen evolution (PHE). This structure exhibits an optimal PHE rate that is four times higher (6.44 mmol g −1 h −1 ) than that of ZIS (1.6 mmol g −1 h −1 ). Furthermore, the significance of the EEF for carrier separation was confirmed via density functional theory calculations based on charge density distribution. This special heterojunction provides a new strategy to accelerate the carrier separation in asymmetric 2D materials.
研究领域:
材料科学
·
化学
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kun Geng,Pengnian Shan,Jinqi Shi,Yu Shen,Shaohan Yan,Minxi Zhao,Feng Guo,Guangzhao Wang,Weilong Shi
Solar energy into hydrogen (H 2 ) energy, as a promising clean energy technology, has garnered significant attention in the face of the escalating global energy crisis. Herein, an innovative Cu@C-N@ZnIn 2 S 4 core–shell catalyst was designed for achieving efficient photothermal-assisted photocatalytic H 2 production with a notable H 2 evolution rate of 6.05 mmol h −1 g −1 under simulated sunlight irradiation and apparent quantum efficiency (AQE) of 9.35 % at wavelength of 420 nm. The enhanced photothermal-assisted photocatalytic performance is attributed to its unique core–shell structure, where the localized surface plasmon resonance (LSPR) of the Cu@C-N core significantly amplifies the photothermal effect, leading to a substantial increase in the reaction system’s temperature, which not only boosts the energy state of photo-generated charge carriers, but also accelerates the separation and migration of electrons and holes. Additionally, the porous water transport channels of Cu@C-N within Cu@C-N@ZnIn 2 S 4 composite facilitate the rapid diffusion of water molecules, allowing more effective interaction with active sites and further enhancing H 2 production efficiency. This work highlights the synergistic effects of LSPR and porous water transport in significantly improving solar to H 2 production, offering new design strategies for high-performance photothermal-assisted 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
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Bo Shao,Tianyun Liu,Deng-Bing Li,Linxing Meng,Jianyuan Wang,Wei Zhai,Liang Li
Solar-driven hydrogen production is significant for achieving carbon neutrality but is limited by unsatisfactory surface catalytic reaction kinetics. Layer regulation can impact carrier transmission or catalytic behavior, but the specific effects on the oxygen or hydrogen evolution reaction (OER or HER) remain unclear, and atomic layer level modulation for maxing HER is challenging. Here the distinct roles of modulated Zn–S or In–S surface layers in ZnIn 2 S 4 (ZIS) for the OER and HER, respectively, are disentangled. Moreover, the extensive characterizations and computational results demonstrate that stressful environments enable individual modulation and introduce Ni into the surface In–S layer rather than the easily alterable Zn–S layer, creating deeper hybridized electronic states of Ni 3 d –S 3 p , optimizing H * adsorption/desorption, and maximizing surface catalytic benefits for the HER. Consequently, the optimized ZIS exhibited a photocatalytic hydrogen production rate of up to 18.19 mmol g −1 h −1 , ≈32 times higher than pristine ZIS. This investigation expands the application scenarios of ultrasonic technology and inspires other precise control types, such as defects and crystal plane engineering, etc.
研究领域:
材料科学
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能源化学
·
催化反应工程
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Wenrui Li,Zhanwei Chen,Shaowei Yang,Kai Cui,Xuefei Zhou,Hanbin Li,Fubin Ma,Wenbin Wang,Qiuyu Zhang,Hepeng Zhang
A PPy/ZnIn2S4 (PPy/ZIS) composite photocatalyst has been successfully synthesized using a straightforward in situ growth method and applied to the photocatalytic degradation of phenol. The flaky ZIS material is evenly enveloped around the surface of tubular PPy, forming PPy/ZIS composites. Compared to ZIS and PPy alone, the PPy/ZIS composite exhibits superior electron–hole pair separation performance. Consequently, the PPy/ZIS composite displays a 7.8-fold increase in photocatalytic efficiency compared to pure ZIS nanomaterials, achieving 95% phenol removal within 4 h. The primary active species responsible for phenol degradation are identified as hydroxyl radicals (·OH) and superoxide radicals (·O2–). Additionally, an exploration is conducted into the photocatalytic breakdown mechanism of phenol under full spectrum irradiation, specifically for the PPy/ZIS composite. Remarkably, the PPy/ZIS composite demonstrates excellent photostability during cycling tests, underscoring its potential as an effective photocatalytic material for phenol degradation.
研究领域:
环境科学
·
材料科学
·
化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xue-Yang Ji,Jingkai Li,Xueping Han,Weixin Zhang,Lingkai Zhu,Ziyou Li,Xiaozhen Ren,Hengshuai Li,Junchang Liu,Dafeng Zhang,Zhengping Li,Xipeng Pu
The symmetry-breaking structure can induce lattice distortion, modulate electron distribution, suppress carrier recombination, and optimizing catalytic activation via asymmetric atom interactions, which is of vital importance for improving the photocatalytic H 2 O 2 production activity. In this paper, the symmetry-breaking structures of Mg-modified ZnIn 2 S 4 microspheres are synthesized through a convenient single-step hydrothermal method using the gradient introduction amounts of Mg. X-ray absorption spectrum, X-ray photoelectron spectroscopy, and transmission electron microscopy indicate that the introduction of Mg can modify the bond lengths and crystal plane angles of the substrate material to construct a symmetry-breaking structure. The photocatalytic H 2 O 2 production performance of MZIS-15 is approximately 3.3-fold than ZnIn 2 S 4 up to 2797.0 μmol h⁻ 1 g⁻ 1 . Furthermore, femtosecond transient absorption spectra, photoelectrochemical measurements, and density functional theory (DFT) calculations reveal that, although the optimal symmetry-breaking structure does not significantly alter the light absorption range and bandgap width, it greatly suppresses the recombination of photogenerated electron–hole pairs, enhances the charge separation efficiency, and lowers the adsorption energy barrier of the O 2 molecule. This work provides a systematic research perspective on symmetry-breaking structures, and also offers new research ideas for the synthesis of advanced catalysts.
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