Visible light driven photocatalytic decomposition of penicillin G by Ti3+ self-doped TiO2 nano-catalyst through response surface methodology
Visible light driven photocatalytic decomposition of penicillin G by Ti3+ self-doped TiO2 nano-catalyst through response surface methodology
复制标题
Ti 3 自掺杂TiO 2 纳米催化剂响应面法可见光驱动光催化分解青霉素G
DOI：
10.1016/j.jtice.2018.03.033
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发表时间：
2018-06-01
影响因子：
5.7
通讯作者：
Cheng, Xiuwen
中科院分区：
文献类型：
--
作者：
Li, Junjing;Deng, Xiaoyong;Cheng, Xiuwen
在本研究中，以硼氢化钾为催化剂，采用一步溶液还原法制备了Ti3+自掺杂纳米TiO2光催化剂。自掺杂过程可以诱导Ti3+和氧空位(O-v)的产生，在TiO2光催化剂的禁带中形成新的能级。此外，还用一系列技术对所得样品的物化性质进行了研究。结果表明，纳米r-TiO2光催化剂具有明显的可见光捕集能力和较高的电荷分离效率。为了考察青霉素G(Peng)降解的影响因素，采用响应面方法中的中心合成法进行了实验设计。为此，选择了r-TiO2用量、Peng浓度和初始pH值作为关键参数。结果表明，r-TiO2用量和初始pH对降解效果有较大影响。在r-TiO2用量为50 mg、Peng浓度为100 mg/L、初始pH为5.5的条件下，Peng的光催化效率最高，为98.3%。(C)2018年台湾化学工程师学会。爱思唯尔出版，版权所有。
In present study, Ti3+ self-doped TiO2 (r-TiO2) nano-catalyst was successfully fabricated by one-step solution reduction treatment in the presence of potassium borohydride. The self-doping process can induce the generation of Ti3+ and oxygen vacancy (O-v) to form a new energy level in the forbidden band of TiO2. Moreover, physicochemical properties of the resulting samples were studied by series of techniques. Results suggest that r-TiO2 nano-catalyst exhibits remarkable enhancement of visible light harvesting and higher charge separation efficiency. In order to investigate the influence factors on degradation of penicillin G (PENG), the experimental design was made using central composite method (CCD) of response surface methodology (RSM). For this purpose, the r-TiO2 dosage, PENG concentration and initial pH value were selected as critical parameters. Results indicate the r-TiO2 dosage and initial pH possess higher influences. Besides, the highest photocatalytic efficiency of PENG (98.3%) can be obtained under the optimal conditions of r-TiO2 dosage 50 mg, PENG concentration 100 mg/L and initial pH 5.5, respectively. (C) 2018 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.