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Electrical and photocatalytic properties of composites of manganese and titanium oxides
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.surfin.2020.100606
Bharati Debi Biswas , Joydeep Datta , Moushumi Dutta Purkayastha , Dhananjoy Das , Partha Pratim Ray , Abhigyan Dutta , Tapas Pal Majumder

Abstract In this study, mesoporous manganese oxide-titanium dioxide (Mn2O3/TiO2) nanocomposites have been synthesized following sol-gel method. Different molar ratios of Mn/Ti were evaluated and MT2 (5:1) showed the best photoactivity as well as carrier transport properties. The Langmuir–Hinshelwood model was delineated to calculate the reaction rate which was found to be highest for MT2 (min-1). Several parameters including pore size distribution, pore volume, adsorption isotherms have been analyzed as per Brunauer–Emmett–Teller (BET) method. That was attributed to the high surface area (121.81 m2/g). The space charge limited current (SCLC) theory was employed to calculate the mobility and transit time. MT2 showed the highest carrier mobility (326×10–7 m2 V-1s-1) and lowest transit time (0.08×10–5 s) which are desirable for efficient photoactivity.

中文翻译:

锰钛氧化物复合材料的电学和光催化性能

摘要 本研究采用溶胶-凝胶法合成了介孔氧化锰-二氧化钛(Mn2O3/TiO2)纳米复合材料。评估了不同的 Mn/Ti 摩尔比,MT2 (5:1) 显示出最好的光活性和载流子传输性能。描述了 Langmuir-Hinshelwood 模型以计算发现 MT2 (min-1) 最高的反应速率。根据Brunauer-Emmett-Teller(BET)方法分析了几个参数,包括孔径分布、孔体积、吸附等温线。这归因于高表面积 (121.81 m2/g)。采用空间电荷限制电流(SCLC)理论来计算迁移率和渡越时间。MT2 显示出最高的载流子迁移率 (326×10–7 m2 V-1s-1) 和最低的传输时间 (0.
更新日期:2020-09-01
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