Optimisation of the Photonic Efficiency of TiO2 Decorated on MWCNTs for Methylene Blue Photodegradation

被引：13

作者：

Abdullahi, Nura ^{[1
]}

Saion, Elias ^{[1
]}

Shaari, Abdul Halim ^{[1
]}

Al-Hada, Naif Mohammed ^{[1
]}

Keiteb, Aysar ^{[1
]}

机构：

[1] Univ Putra Malaysia, Fac Sci, Dept Phys, Serdang 43400, Selangor, Malaysia

来源：

PLOS ONE | 2015年 / 10卷 / 05期

关键词：

ENHANCED PHOTOCATALYTIC ACTIVITY; CARBON NANOTUBES; THIN-FILMS; DEGRADATION; NANOCOMPOSITES; IRRADIATION;

D O I：

10.1371/journal.pone.0125511

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

MWCNTs/TiO2 nanocomposite was prepared by oxidising MWCNT in H2SO4/HNO3 then decorating it with TiO2-p25 nanopowder. The composites were characterised using XRD, TEM, FT-IR PL and UV-vis spectroscopy. The TEM images have shown TiO2 nanoparticles immobilised onto the sidewalls of the MWCNTs. The UV-vis spectrum confirms that the nanocomposites can significantly absorb more light in the visible regions compared with the commercial TiO2 (P25). The catalytic activity of these nanocomposites was determined by photooxidation of MB aqueous solution in the presence of visible light. The MWCNTs/TiO2 (1: 3) mass ratio showed maximum degradation efficiency. However, its activity was more favourable in alkaline and a neutral pH than an acidic medium.

引用

页数：12

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