Enhanced Photocatalytic Activity of an Acid-modified TiO2 Surface for Degradation of the Azo Dye Remazol Red

被引：4

作者：

Afrin, Unjila ^{[1
,2
]}

Mian, Mohammad Rasel ^{[2
]}

Breedlove, Brian K. ^{[2
]}

Hossain, Md. Mufazzal ^{[1
]}

机构：

[1] Univ Dhaka, Dept Chem, Dhaka 1000, Bangladesh

[2] Tohoku Univ, Grad Sch Sci, Dept Chem, 6-3 Aza Aoba, Sendai, Miyagi 9808578, Japan

来源：

CHEMISTRYSELECT | 2017年 / 2卷 / 32期

关键词：

Titaniumdioxide; positive surface; photocatalysis dye; photodegradation; WATER; OXIDATION; EFFICIENCY; CHEMISTRY; TITANIUM; ANATASE; NANOPARTICLES; UV/TIO2; PHENOL;

D O I：

10.1002/slct.201701522

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Effects of acid-modified crystalline titania (TiO2) on the photocatalytic degradation of the azo dye Remazol Red (RR) were investigated in order to design an effective catalyst for removing azo dye compounds from contaminated waste streams. The mechanism for RR photodegradation with acid-modified TiO2 (m-TiO2) was investigated using UV-visible spectroscopy and scanning electron microscopy (SEM). Modification of the TiO2 surface with hydrochloric acid (HCl) resulted in enhanced RR photodecomposition in water. The RR photodecomposition reactions are 19% more efficient than those with pure commercial TiO2 under UV radiation. The coupling between RR and TiO2 was improved by treating TiO2 with HCl. As a result, transfer of electrons from the conduction band of TiO2 to the RR was enhanced. The modification of crystalline TiO2 surface with HCl is a useful method for enhancing photodegradation of RR.

引用

页码：10371 / 10374

页数：4

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