当前位置：
X-MOL 学术
›
ACS Appl. Nano Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Mixed-Phase ZnIn2S4 Nanosheets Grown on TiO2 Nanotrees for the Visible-Light Photocatalytic Degradation of Organic Dyes
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2022-01-04 , DOI: 10.1021/acsanm.1c03202 Guolong Song 1 , Qingzhe Zhang 1, 2 , Fuyu Liu 2 , Chen Wang 1 , Ruiqi Yang 1 , Zhi Chen 3 , Dongling Ma 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2022-01-04 , DOI: 10.1021/acsanm.1c03202 Guolong Song 1 , Qingzhe Zhang 1, 2 , Fuyu Liu 2 , Chen Wang 1 , Ruiqi Yang 1 , Zhi Chen 3 , Dongling Ma 1
Affiliation
|
A broad-band, environmentally friendly multijunction photocatalyst, composed of mixed-phase ZnIn2S4 in situ grown on TiO2 nanotree powders (NtPs), was prepared via a facile hydrothermal method. The unique structure of the TiO2 NtPs provided a large surface area for the easy growth of ZnIn2S4 and for the efficient adsorption of reactants. The introduced ZnIn2S4, possessing a homojunction structure enabled by two closely interlaced crystalline phases, endowed the ZnIn2S4/TiO2 composite with an enhanced visible-light response and boosted charge separation between the two phases. Moreover, the in situ growth of ZnIn2S4 on TiO2, forming a heterojunction at the interface, rendered an intimate contact and strong interaction, which was favorable for the efficient charge transfer between the two components. These advantages all together resulted in the significantly enhanced visible-light photocatalytic activity in the degradation of methyl orange. The charge-transfer dynamics and pathways were studied by performing photoluminescence measurements and in situ irradiated X-ray photoelectron spectroscopy analysis. The active species involved in photocatalysis were also explored by carrying out trapping experiments. Based on these results, the possible mechanism for the enhanced photocatalytic activity was proposed and discussed. This work highlights the great potential of developing broad-band and efficient ZnIn2S4- and TiO2-based photocatalysts through simultaneously constructing both a homojunction and a heterojunction for remediating environmental pollution and provides a mechanistic understanding of photocatalysis in a type-II, multijunction hybrid.
中文翻译：
在 TiO2 纳米树上生长的混合相 ZnIn2S4 纳米片用于可见光光催化降解有机染料
通过简便的水热法制备了一种由混合相 ZnIn 2 S 4在 TiO 2纳米树粉末 (NtPs)上原位生长的宽带、环保型多结光催化剂。TiO 2 NtPs的独特结构为ZnIn 2 S 4的容易生长和反应物的有效吸附提供了大的表面积。引入的 ZnIn 2 S 4具有由两个紧密交错的晶相实现的同质结结构，赋予了 ZnIn 2 S 4 /TiO 2复合材料具有增强的可见光响应和两相之间的电荷分离。此外，ZnIn 2 S 4在 TiO 2上的原位生长，在界面处形成异质结，形成紧密接触和强相互作用，有利于两种组分之间的有效电荷转移。这些优势共同导致甲基橙降解中可见光光催化活性的显着增强。通过进行光致发光测量和原位辐照 X 射线光电子能谱分析来研究电荷转移动力学和途径。还通过进行捕获实验探索了参与光催化的活性物质。基于这些结果，提出并讨论了提高光催化活性的可能机制。这项工作突出了开发宽带高效ZnIn 2 S 4的巨大潜力- 和 TiO 2基光催化剂通过同时构建同质结和异质结来修复环境污染，并提供对 II 型多结杂化光催化的机理理解。
更新日期：2022-01-28
中文翻译：
在 TiO2 纳米树上生长的混合相 ZnIn2S4 纳米片用于可见光光催化降解有机染料
通过简便的水热法制备了一种由混合相 ZnIn 2 S 4在 TiO 2纳米树粉末 (NtPs)上原位生长的宽带、环保型多结光催化剂。TiO 2 NtPs的独特结构为ZnIn 2 S 4的容易生长和反应物的有效吸附提供了大的表面积。引入的 ZnIn 2 S 4具有由两个紧密交错的晶相实现的同质结结构，赋予了 ZnIn 2 S 4 /TiO 2复合材料具有增强的可见光响应和两相之间的电荷分离。此外，ZnIn 2 S 4在 TiO 2上的原位生长，在界面处形成异质结，形成紧密接触和强相互作用，有利于两种组分之间的有效电荷转移。这些优势共同导致甲基橙降解中可见光光催化活性的显着增强。通过进行光致发光测量和原位辐照 X 射线光电子能谱分析来研究电荷转移动力学和途径。还通过进行捕获实验探索了参与光催化的活性物质。基于这些结果，提出并讨论了提高光催化活性的可能机制。这项工作突出了开发宽带高效ZnIn 2 S 4的巨大潜力- 和 TiO 2基光催化剂通过同时构建同质结和异质结来修复环境污染，并提供对 II 型多结杂化光催化的机理理解。
京公网安备 11010802027423号