An effective strategy to improve dynamic and cyclic stability of HQC/TiO2 photocatalyst by introducing carbon quantum dots or iron ion via metal-complex
An effective strategy to improve dynamic and cyclic stability of HQC/TiO2 photocatalyst by introducing carbon quantum dots or iron ion via metal-complex
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通过金属配合物引入碳量子点或铁离子来提高HQC/TiO2光催化剂动态和循环稳定性的有效策略
DOI：
10.1016/j.apcatb.2017.04.019
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发表时间：
2017-08
影响因子：
22.1
通讯作者：
Zhang Min
中科院分区：
文献类型：
--
作者：
Ni D;an;Shang Qingkun;Guo Tongtong;Wang Xinyue;Wu Yongmei;Guan Hongyu;Wang Dan;Zhang Min
合成了一种新型光催化剂8-羟基喹啉-7-羧酸/TiO 2（HQC/TiO 2），并将其用于可见光催化降解苯酚。该催化剂具有良好的光催化活性，在可见光照射下2 h，苯酚的降解率可达95.9%。但是，回收效率不是很理想。为了提高其在回收过程中的光稳定性，我们采用了一种新颖有效的策略，将碳量子点或铁离子引入到光催化体系中。制备了CQDs/HQC/TiO_2和Fe（HQC）_3/TiO_2两种新型催化剂。通过X射线衍射、红外光谱、紫外-可见吸收和漫反射光谱、X射线光电子能谱、透射电子显微镜和光电化学等手段，研究了HQC/TiO 2、CQDs/HQC/TiO 2和Fe（HQC）3/TiO 2的结构和形貌特征，提出了这三种光催化剂可能的和不同的光催化机理。在此基础上，探讨了通过Fe-HQC络合物引入CQDs或Fe 3+离子对HQC/TiO 2动态和循环稳定性的影响。
A novel photocatalyst, 8-hydroxy-Quinoline-7-carboxylic acid/TiO2(HQC/TiO2) was synthesized and used to decompose phenol under visible light irradiation. It exhibited excellent photocatalytic activities, about 95.9% of phenol can be degraded after 2 h visible light illumination. However, the recycling efficiency is not very ideal. In order to improve its photostability during recycling process, we had adopted a novel and effective strategy for the introduction of carbon quantum dots or iron ions into the photocatalytic system. Two other novel catalysts, CQDs/HQC/TiO2and Fe(HQC)3/TiO2were prepared. After investigated the structure and morphology characteristics of HQC/TiO2, CQDs/HQC/TiO2and Fe(HQC)3/TiO2by analysis of X-ray diffraction, FTIR spectra, UV–vis absorption and diffuse reflectance spectra, X-ray photoelectron spectroscopy, transmission electron microscopic and photoelectrochemical properties, the possible and different photocatalytic mechanisms for these three photocatalysts were proposed. On the basis of this, the key factors affecting the dynamic and cyclic stability of HQC/TiO2by introducing CQDs or Fe3+ions via Fe-HQC complex were explored.
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影响因子：
--
作者：
B. Yu;S. Kwak
通讯作者：
B. Yu;S. Kwak
影响因子：
22.1
作者：
M. Dozzi;S. Marzorati;M. Longhi;M. Coduri;L. Artiglia;E. Selli
通讯作者：
M. Dozzi;S. Marzorati;M. Longhi;M. Coduri;L. Artiglia;E. Selli
影响因子：
2.7
作者：
Zhijie Zhang;Tingting Zheng;Xiaoming Li;Jiayue Xu;H. Zeng
通讯作者：
Zhijie Zhang;Tingting Zheng;Xiaoming Li;Jiayue Xu;H. Zeng
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影响因子：
22.1
作者：
Qian, Xufang;Yue, Dongting;Zhao, Yixin
通讯作者：
Zhao, Yixin
影响因子：
6.7
作者：
Lei Li;Yujie Feng;Youzhi Liu;Bing Wei;Guo Jiaxin;Weizhou Jiao;Zhaohan Zhang;Qiaoling Zhang
通讯作者：
Lei Li;Yujie Feng;Youzhi Liu;Bing Wei;Guo Jiaxin;Weizhou Jiao;Zhaohan Zhang;Qiaoling Zhang