Surface-binding through polyfunction groups of Rhodamine B on composite surface and its high performance photodegradation
Surface-binding through polyfunction groups of Rhodamine B on composite surface and its high performance photodegradation
复制标题
罗丹明B多官能团在复合材料表面的表面结合及其高性能光降解
DOI：
10.1016/j.apsusc.2016.01.045
复制
发表时间：
2016-03-15
影响因子：
6.7
通讯作者：
Xu, Zhaodi
中科院分区：
文献类型：
--
作者：
Wan, Yiqun;Wang, Xiaofen;Xu, Zhaodi
以氧化锌纳米片为锌原料，水热法制备了一种新型复合材料ZnS/In(OH)(3)/In2S3。所得样品虽然由ZnS、In(OH)(3)和In2S3相组成，但由于原料的摩尔比不同，样品具有不同的结构、形貌和光学吸收性能。Zeta电位分析表明，由于相的含量和粒度不同，表面电性能也不同。平衡吸附研究证实了表面带负电荷的ZnS/In(OH)(3)/In2S3复合材料是罗丹明B （Rh B）染料的良好吸附剂。此外，在可见光下，表面带负电荷的样品比表面带正电荷的样品对Rh B的降解更有效。吸附rb分子前后的样品用红外光谱和Zetasizer进行了表征。发现Rh B分子的3个官能团，尤其是羧基通过静电吸附、配位和氢键等作用锚定在样品表面。它有助于光生电子快速转变为In(OH)(3)的导带，抑制光生载流子的重组。在实验结果的基础上，讨论了可能的吸附方式。(C) 2016 Elsevier B.V.版权所有
A kind of novel composite ZnS/In(OH)(3)/In2S3 is synthesized using zinc oxide nanoplates as zinc raw material during hydrothermal process. Although the obtained samples are composited of ZnS and In( OH)(3) and In2S3 phase, the samples possess different structure, morphology and optical absorption property depending on molar ratio of raw materials. Zeta potential analysis indicates different surface electrical property since various content and particle size of the phases. The equilibrium adsorption study confirms the composite ZnS/In(OH)(3)/In2S3 with surface negative charge is good adsorbent for Rhodamine B (Rh B) dye. In addition, the degradation of Rh B over the samples with surface negative charge under visible light > 420 nm) is more effective than the samples with surface positive charge. The samples before and after adsorbing Rh B molecule are examined by FTIR spectra and Zetasizer. It is found that the three function groups of Rh B molecule, especially carboxyl group anchors to surface of the sample through electrostatic adsorption, coordination and hydrogen-bond. It contributes to rapid transformation of photogenerated electron to conduction band of In( OH)(3) and suppresses the recombination of photogenerated carrier. The possible adsorption modes of Rh B are discussed on the basis of the experiment results. (C) 2016 Elsevier B.V. All rights reserved.