Photocatalytic Degradation of Rhodamine B using MnO2 and ZnO Nanoparticles

被引：20

作者：

Chan, Yim-Leng ^{[1
]}

Pung, Swee-Yong ^{[1
]}

Hussain, Nur Syafiqah ^{[1
]}

Sreekantan, Srimala ^{[1
]}

Yeoh, Fei-Yee ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Mat & Mineral Resources Engn, Engn Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia

来源：

ISESCO CONFERENCE ON NANOMATERIALS AND APPLICATIONS 2012 | 2013年 / 756卷

关键词：

MnO2; ZnO; photocatalysis; nanomaterials;

D O I：

10.4028/www.scientific.net/MSF.756.167

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The oxide semiconductor with different bandgap energy i.e. manganese dioxide (MnO2) (E-g: 1.30eV) and zinc oxide (ZnO) (E-g: 3.37 eV) nanoparticles were used to degrade Rhodamine B (RhB) under irradiation of UV light (254 nm). The MnO2 nanoparticles were synthesized by hydrothermal method (160 degrees C, 4 h) using analytical grade manganese sulfate hydrate and potassium permanganate (VII) as precursors. The XRD analysis reveals that the nanoparticles were delta-MnO2. The photocatalytic study shows that degradation of RhB solution by ZnO nanoparticles (rate constant: 0.02749 min(-1)) was approximately four times faster than the delta-MnO2 nanoparticles (rate constant: 0.0067 min(-1)). This observation could be attributed to the higher reducing and oxidizing power of ZnO in producing free radicals for photodegradation of RhB solution.

引用

页码：167 / +

页数：3

共 21 条

[1] Raschig rings-Fe203 composite photocatalyst activate in the degradation of 4-chlorophenol and Orange II under daylight irradiation [J].