Effects of structure, morphology, and up-conversion on Nd-doped BiVO4 system with high photocatalytic activity
Effects of structure, morphology, and up-conversion on Nd-doped BiVO4 system with high photocatalytic activity
复制标题
结构、形貌和上转换对高光催化活性 Nd 掺杂 BiVO4 体系的影响
DOI：
10.1016/j.ceramint.2014.11.016
复制
发表时间：
2015-03
影响因子：
5.2
通讯作者：
Ao Xia
中科院分区：
文献类型：
--
作者：
Guoqiang Tan;Guohua Dong;Huijun Ren;Ao Xia
采用微波水热法合成了具有高光催化活性的Nd掺杂BiVO 4光催化剂。系统研究了Nd掺杂对BiVO 4光催化剂的结构转变、形貌、化学价态、光学性质和光催化活性的影响。研究发现，反应前体的Nd掺杂和pH值可以诱导四方锆英石BiVO 4的稳定化，并且Nd 3+离子已掺入BiVO 4晶格中。BiVO 4的结构和形貌对其光催化活性有重要影响。掺钕BiVO 4的紫外-可见漫反射光谱在532、590、690和750 nm处出现4个吸收峰，这是由于Nd 3+物种的激发。Nd掺杂BiVO 4体系的上转换荧光光谱表明存在上转换过程，且k/BET值能直观、生动地反映Nd掺杂BiVO 4体系的上转换效应。Nd掺杂BiVO 4催化剂在模拟太阳光下的高光降解活性主要来自紫外光区。在太阳光激发下的上转换机制提出了有利于提高Nd掺杂BiVO 4的光催化活性。
Nd-doped BiVO4photocatalysts with high photocatalytic activities have been synthesized by the microwave hydrothermal method. The effects of Nd doping on structural transformation, morphology, chemical valence, optical properties, and photocatalytic activities of Nd-doped BiVO4photocatalysts were investigated systematically. It is found that Nd doping and pH of the reaction precursor can induce the stabilization of tetragonal zircon BiVO4, and Nd3+ions have been incorporated into the BiVO4lattice. The structure and morphology of BiVO4play a significant role in the photocatalytic activity. The UV–vis diffuse reflectance spectra of Nd-doped BiVO4present four absorption peaks at 532, 590, 690 and 750 nm due to the excitation of Nd3+species. The strong up-conversion fluorescence spectra of Nd-doped BiVO4suggest the existence of up-conversion process, and the value of k/BET could reflect the effect of up-conversion lively and directly in Nd-doped BiVO4system. The contribution of high photodegradation activities to Nd-doped BiVO4catalysts under simulated sun-light is mainly from UV-light region. The mechanism of up-conversion upon sun-light excitation is proposed in favor of the improved photocatalytic activities of Nd-doped BiVO4.
登录
查看更多内容
影响因子：
4.6
作者：
D. Lee;I. Cho;Sangwook Lee;Shin-Tae Bae;J. Noh;Dong‐Wan Kim;K. Hong
通讯作者：
D. Lee;I. Cho;Sangwook Lee;Shin-Tae Bae;J. Noh;Dong‐Wan Kim;K. Hong
多孔类橄榄BiVO4：醇水热制备和优异的可见光驱动光催化性能用于降解苯酚
DOI：
10.1016/j.apcatb.2011.04.026
发表时间：
2011-06
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
Jiang, Haiyan;Dai, Hongxing;Meng, Xue;Ji, Kemeng;Zhang, Lei;Deng, Jiguang
通讯作者：
Deng, Jiguang
影响因子：
4.6
作者：
Xiufang Zhang;Y. Gong;Xiaoli Dong;Xinxin Zhang;Chun Ma;Fei Shi
通讯作者：
Xiufang Zhang;Y. Gong;Xiaoli Dong;Xinxin Zhang;Chun Ma;Fei Shi
BiVO4晶相对光生载流子行为和光催化活性的影响
影响因子：
3.7
作者：
Fan, Haimei;Jiang, Tengfei;Xie, Tengfeng
通讯作者：
Xie, Tengfeng
影响因子：
15.1
作者：
Ju, Peng;Wang, Ping;Wang, Yi
通讯作者：
Wang, Yi