氮掺杂氧化锌纳米粒子的可见光催化研究
首发时间:2014-02-20
摘要:随着能源危机和环境污染等问题的日益严重,光催化分解技术不断发展。作为一种半导体氧化物的氧化锌,可以用来降解有机污染物,解决环境问题。但是,氧化锌只对紫外光有一定的响应,吸收光能后,受到激发产生电子的能级跃迁,但紫外光在太阳光中的比例很小,只占5-7%。所以,将氧化锌的响应波长范围红移到400-800 nm的可见光区域是目前的研究重点。本文采用溶剂热法,以苄胺作为溶剂,在无水体系中合成氮掺杂的氧化锌样品。在反应前躯体中,没有加入其它的配合物或表面活性剂。产物的组成成分、形貌、固体紫外可见漫反射、降解亚甲基蓝溶液的催化速率等采用X射线粉末衍射、电子透射显微镜、固体紫外可见吸收仪等手段进行测试。
关键词: 溶剂热方法、氧化锌、掺杂、光催化
For information in English, please click here
Visible-light photocatalysis study on N-doped ZnO nanoparticles
Abstract:The photocatalysis technique of semiconductors is the expectation under the shadow of energy shortage and environmental crisis. As an important functional oxide semiconductor, ZnO can be used as photocatalyst. But the solar spectrum has very little (5-7%) contribution in the UV region which could be utilized for solar excitation or conversion by ZnO. Clearly, the photoresponse application efficiency of the ZnO nanoparticles can be enhanced dramatically by red shifting its absorption to the visible region (400-800 nm). Herein, a facile solvethermal method was used to prepare the N-doped ZnO nanoparticles in the non-aqueous system without surfactants or ligands. Their structure and morphology are characterized by X-ray diffraction spectroscopy, scanning electron microscopy, energy dispersive spectrometer, UV-vis absorption spectrophotometer and X-ray photoelectron spectroscopy analysis and their photocatalytic performance for the degradation of methylene blue is also evaluated.
Keywords: ZnO nanoparticles photocatalysis N-doping
基金:
论文图表:
引用
No.4585376507976139****
同行评议
勘误表
氮掺杂氧化锌纳米粒子的可见光催化研究
评论
全部评论0/1000