APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Yaoyao Wu,Xiaotao Chen,Jiachun Cao,Yuqing Zhu,Wenjing Yuan,Zhuofeng Hu,Zhimin Ao,Gary W. Brudvig,Fenghui Tian,Jimmy C. Yu,Chuanhao Li
Photocatalysis is a promising technology for energy and environment applications. Herein, a dual-defect heterojunction system of TiO 2 hierarchical microspheres with oxygen vacancies modified with ultrathin MoS 2−x nanosheets (MoS 2−x @TiO 2 -OV) is designed for simultaneously degrading pollutants and evolving hydrogen. MoS 2−x @TiO 2 -OV exhibits a dramatically enhanced photocatalytic activity with a H 2 evolution rate of 2985.16 μmol g −1 h −1 . In treating the simulated pharmaceutical wastewater, MoS 2−x @TiO 2 -OV is capable of purifying various refractory contaminants, with the highest H 2 evolution rate of 41.59 μmol g −1 h −1 during enrofloxacin degradation. While treating the simulated coking wastewater, the catalyst achieves a H 2 evolution rate of 102.72 μmol g −1 h −1 and a mineralization rate of 50%. Computational studies suggest that the dual-defect is superior for the adsorption of H* and producing·OH (‘dual-defect boosted dual-function’). Also, the dual-defect sites significantly boosted the charge-carrier separation and transfer efficiencies. This work highlights the crucial role of defect engineering to develop the energy-recovering wastewater treatment approaches.
研究领域:
环境科学
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材料科学
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化学工程
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能源化学
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光催化
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水污染控制
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纳米材料
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可持续能源
✓ 已验证
DOI
高影响因子
ChemSusChem
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2016
·Vol. 9
·期 10
·1118-1124
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IF 7.116
Xuefeng Liu,Zipeng Xing,Hang Zhang,Wenmei Wang,Yan Zhang,Zhenzi Li,Xiaoyan Wu,Xiujuan Yu,Wei Zhou
Graphical Pass the Mo : A 3 D sandwich of mesoporous black TiO 2 (MBT)/MoS 2 /MBT was fabricated using a facile mechanochemistry method combined with an in situ solid-state chemical reduction approach. The material exhibited excellent visible-light-driven photocatalytic performance for pollutant degradation and hydrogen evolution owing to the sandwich-like heterojunction structure and Ti 3+ doping. A novel 3 D mesoporous black TiO 2 (MBT)/MoS 2 /MBT sandwich-like nanosheet was successfully fabricated using a facile mechanochemical process combined with an in situ solid-state chemical reduction approach, followed by mild calcination (350 °C) under an argon atmosphere. The MBT/MoS 2 /MBT exhibits a 3 D sandwich-like nanosheet structure and heterojunctions are formed at the interfaces between MoS 2 and black TiO 2 . The significantly narrowed band gap of MBT/MoS 2 /MBT is attributed to the introduction of MoS 2 and the formed Ti 3+ species in the frameworks. The visible-light photocatalytic degradation rate of methyl orange and the hydrogen production rate are as high as 89.86 % and 0.56 mmol h −1 g −1 , respectively. The introduction of MoS 2 and Ti 3+ in the frameworks favors the visible-light absorption and the separation of photogenerated charges, and the 3 D sandwich-like heterojunction structure facilitates the transfer of photogenerated charges.
研究领域:
材料科学
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化学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 24
·2201896
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IF 15.153
Daying Guo,Zhixin Wan,Guoyong Fang,Mengqi Zhu,Bin Xi
Reported herein is a highly active and durable hydrogen evolution reaction (HER) electrocatalyst, which is constructed following a tandem interface strategy and functional in alkaline and even neutral medium (pH ≈ 7). The ternary composite material, consisting of conductive nickel foam (NF) substrate, Ni 3 S 2 -MoS 2 heterostructure, and TiO 2 coating, is synthesized by the hydrothermal method and atomic layer deposition (ALD) technique. Representative results include: (1) versatile characterizations confirm the proposed composite structure and strong electronic interactions among comprised sulfide and oxide species; (2) the material outperforms commercial Pt/C by recording an overpotential of 115 mV and a Tafel slope of 67 mV dec −1 under neutral conditions. A long-term stability in alkaline electrolytes up to 200 h and impressive overall water splitting behavior (1.56 V @ 10 mA cm −2 ) are documented; (3) implementation of ALD oxide tandem layer is crucial to realize the design concept with superior HER performance by modulating a variety of heterointerface and intermediates electronic structure.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Yanjia Yu,Junmin Wan,Ziang Yang,Zhiwen Hu
A novel route for synthesis of MoS 2 /TiO 2 /hollow microfibers (HMFs) ternary composite photocatalyst using sol-gel method combined with high temperature calcination under a nitrogen circumstances was reported for the first time. The morphology, structure and optical properties of the novel MoS 2 /TiO 2 /HMFs photocatalysts were fully characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), specific surface area (BET) and thermogravimetric analysis (TG). The photocatalytic activities were evaluated by photodegradating Methylene blue (MB) and Rhodamine B (RB) under visible light irradiation. The results showed the MoS 2 /TiO 2 /HMFs ternary composite hollow microfibre photocatalysts had a purification of more than 98.7% for MB and RB of simulating wastewater, and acquired the superior synergistic effect of adsorption and catalysis for organic pollutants . That’s because the sensitization of MoS 2 enlarged the wavelength response range to the visible region of the solar spectrum , the HMFs could beneficially increase adsorption capability for organic pollutants, and the mixed crystalline phase of TiO 2 accelerated the decomposition of organic pollutant. A detailed study of involved active species unraveled the mechanism regarding photocatalysis . So, the synergistic photocatalytic effect of HMFs, TiO 2 and MoS 2 was very important and significant for wastewater treatment or prevention of air pollution.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2023
·Vol. 148
·期 8
·1732-1742
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IF 4.2
Chonghui Wei,Xuan Xie,Yue Mou,Shiqi Cheng,Jin Yang,Kaixin Xue,Kewei Yu,Xinru Lin,Chunfen Zhang,Yujie Zhao,Xingyu Luo,Yilin Wang
Dopamine (DA) plays an essential role in dopaminergic neuronal behavior and disease. However, current detection methods for discriminating the secretion of DA are hampered by the limitations of the requirement for bulky instrumentation and non-intuitive signals. Herein, we have controllably and proportionately integrated molybdenum disulfide (MoS2) with titanium dioxide (TiO2) to prepare MoS2@TiO2 nanocomposites (MoS2@TiO2 NCs) via a facile synthesis method. MoS2@TiO2 NCs with a certain reactant mass ratio have shown a significant enhancement in peroxidase-like activity with superiority of the nanocomposite structure compared to single MoS2 or natural enzyme. The method for catalyzing the decomposition of H2O2 by MoS2@TiO2 NCs and competition for hydroxyl radicals (˙OH) between the chromogenic agent and DA enable a sensitive, specific, and colorimetric DA analysis with a low detection limit of 0.194 μM and a wide linear detection range (0.8 to 100 μM). Because of the favorable detection performance, we were encouraged to explore and finally realize the visual detection of cellular DA secretion that is stimulated in a High-K+ neurocyte environment. Collectively, this method will provide a promising strategy for basic research in neuroscience with its portable, sensitive, and naked-eye detectable performance.
研究领域:
生物化学
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纳米医学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2021
·
IF 3.196
Zhufeng Shao,Wenhao Liu,Yufeng Zhang,Xiujuan Yang,Min Zhong
Novel MoS 2 nanobelts (NBs) decorated highly ordered alignment TiO 2 nanotubes arrays (TiO 2 -NTAs) with promoted photoelectrocatalytic (PEC) photodegradation and sensing performance under UV-Visible light irradiation were successfully synthesized via a facile combination of anodization and electrodeposition procedure. Simultaneously, the MoS 2 /TiO 2 -NTAs nanohybrids presented a significantly enhanced for PEC activity tests, which were mainly ascribed to the synergistic effect between MoS 2 NBs and TiO 2 -NTAs for the efficient separation of photogenerated carriers induced by the enlarged staggered band offset associated with sulfur vacancies defects. Furthermore, self-consistent interfacial charge transfer mechanism and convincing quantitative dynamic process (i.e. rate constant of charge transfer) for MoS 2 /TiO 2 -NTAs type-II nanoheterojunctions mediated with the p -type doping effect are proposed, which were evaluated by nanosecond time-resolved transient photoluminescence (NTRT-PL) and time-resolved photoluminescence (TRPL) spectra, respectively. Following this scheme, the photodegradation rate (η) toward degradation of methyl orange for optimum MoS 2 /TiO 2 -NTAs-2 nanocomplex was 96% irradiated by UV-Visible light, which are 1.2 and 1.1 times than that of MoS 2 /TiO 2 -NTAs-1 and MoS 2 /TiO 2 -NTAs-5, respectively. Furthermore, the PEC biosensing analysis of MoS 2 /TiO 2 -NTAs-2 was performed for detecting the glutathione, leading to an excellent detect limit of 1.6 μM and the sensitivity of 930 mA cm -2 M -1 . Additionally, the sensitivity of gas-sensing for MoS 2 /TiO 2 -NTAs-2 is 3.1, which are 1.3 and 1.1 folds than that of MoS 2 /TiO 2 -NTAs with MoS 2 deposited times 1 min and 5 min, respectively. It is distinctly manifested that the gas sensing performance of MoS 2 /TiO 2 -NTAs-2 toward ammonia gas is superior than that of MoS 2 /TiO 2 -NTAs-1 and MoS 2 /TiO 2 -NTAs-5 in terms of higher sensitivity degree and faster response speed.
研究领域:
材料科学
·
环境科学
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传感器技术
✓ 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）