Photocatalytic Performance and Degradation Mechanism of Aspirin by TiO2 through Response Surface Methodology

被引：25

作者：

Li, Lezhuo ^{[1
]}

Ma, Qiuling ^{[2
]}

Wang, Sanfan ^{[1
]}

Song, Sanxiang ^{[1
]}

Li, Bo ^{[2
,3
]}

Guo, Ruonan ^{[2
]}

Cheng, Xiuwen ^{[2
,3
]}

Cheng, Qingfeng ^{[4
]}

机构：

[1] Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Engn Res Ctr Cold & Arid Reg Water Resource Compr, Minist Educ, Lanzhou 730070, Gansu, Peoples R China

[2] Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China

[3] Chinese Acad Sci, Key Lab Comprehens & Highly Efficient Utilizat Sa, Qinghai Inst Salt Lakes, Xinning Rd 18, Xining 810008, Qinghai, Peoples R China

[4] Chengdu Univ Informat Technol, Coll Resources & Environm, Chengdu 610225, Sichuan, Peoples R China

来源：

CATALYSTS | 2018年 / 8卷 / 03期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; aspirin; central composite design; response surface methodology; TiO2; CARE PRODUCTS PPCPS; NANOTUBE ARRAY ELECTRODE; WASTE-WATER; ADVANCED OXIDATION; PHARMACEUTICALS; DICLOFENAC; REMOVAL; NANOCOMPOSITES; OPTIMIZATION; FABRICATION;

D O I：

10.3390/catal8030118

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present work, the photocatalytic performance of P25TiO(2) was investigated by means of the degradation of aspirin, while the reaction system was systematically optimized by central composite design (CCD) based on the response surface methodology (RSM). In addition, three variables of initial pH value, initial aspirin concentration and P25 concentration were selected to assess the dependence of degradation efficiencies of aspirin. Meanwhile, a predicted model of degradation efficiency was estimated and checked using analysis of variance (ANOVA). The results indicated that the PC removal of aspirin by P25 was significantly influenced by all these variables in descending order as follows: P25 concentration > initial aspirin concentration > initial pH value. Moreover, the parameters were optimized by the CCD method. Under the conditions of an initial pH value of 5, initial aspirin concentration of 10 mg/L and P25 concentration of 50 mg/L, the degradation efficiency of aspirin was 98.9% with 60 min of Xenon lamp irradiation. Besides, based on the liquid chromatography-mass spectrometry measurements, two main PC degradation pathways of aspirin by TiO2 were deduced and the tentative degradation mechanism was also proposed.

引用

页数：14

共 43 条

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