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首页> 外文期刊>Nanotechnology >Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S nanocomposites with efficient photocatalytic performance via one-step hydrothermal route
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Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S nanocomposites with efficient photocatalytic performance via one-step hydrothermal route

机译：Z-SchemeDIO2@TI3C2/CD0.5ZN0.5S纳米复合材料，通过一步水热路径有效的光催化性能

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摘要

Photocatalytic degradation of pollutants has been proved to be an effective strategy for wastewater treatment. Herein, TiO(2)nanoparticles were synthesized on a Ti(3)C(2)matrix byin situgrowth, forming Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S (TO/CZS) multilevel structured nanocomposites via one-step hydrothermal route. The effects of hydrothermal temperature and Cd0.5Zn0.5S content on microstructure and properties of composites were assessed. TO/CZS nanocomposites were probed into phase composition, morphological and optical properties with x-ray diffractometer, infrared radiation, scanning electron microscope and UV-vis reflective spectra. Following the hydrothermal reaction at 160 degrees C for 12 h, TiO(2)nanoparticles of 30 nm in diameter were generatedin situon Ti(3)C(2)lamina and Cd0.5Zn0.5S particles were evenly distributed on the Ti(3)C(2)matrix. The photocatalytic activity of TO/CZS composites were evaluated, which found that degradation rate constant (k= 0.028 min(-1)) of TO/CZS-40 on Rhodamine B was 5.19 times that of pure TiO(2)and 4.48 times that of Cd0.5Zn0.5S. Through anchoring Ti(3)C(2)as an electron transition mediator and combination with TiO(2)and Cd0.5Zn0.5S, the new Z-scheme between TiO(2)oxidized by Ti(3)C(2)and Cd0.5Zn0.5S establishes a multilevel structure of separating electron-hole pairs. This work demonstrates a valid way to control electrons and hole transfer directions efficiently through designing multilevel semiconductor structural designs.
机译：光催化降解污染物已被证明是一种有效的废水处理策略。在这里，TiO（2）纳米颗粒是通过situgrowth在Ti（3）C（2）基体上合成的，形成Z-方案TiO2@Ti3C2/Cd0。5Zn0。5S（TO/CZS）多层结构纳米复合材料，通过一步水热法。热液温度和Cd0的影响。5Zn0。研究了5S含量对复合材料微观结构和性能的影响。采用x射线衍射仪、红外光谱、扫描电镜和紫外-可见反射光谱对TO/CZS纳米复合材料的相组成、形貌和光学性能进行了研究。在160℃水热反应12h后，在situon Ti（3）C（2）层和Cd0中生成直径为30nm的TiO（2）纳米颗粒。5Zn0。5S粒子均匀分布在Ti（3）C（2）基体上。对TO/CZS复合材料的光催化活性进行了评价，发现TO/CZS-40在罗丹明B上的降解速率常数（k=0.028min（-1））是纯TiO（2）的5.19倍，是Cd0的4.48倍。5Zn0。5秒。通过锚定Ti（3）C（2）作为电子过渡介质，并与TiO（2）和Cd0结合。5Zn0。5S，Ti（3）C（2）氧化TiO（2）与Cd0之间的新Z-方案。5Zn0。5S建立了分离电子-空穴对的多级结构。这项工作证明了通过设计多电平半导体结构设计来有效控制电子和空穴转移方向的有效方法。

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