Photocatalytic removal of cyclohexane on visible light-driven gallium oxide/carbon nitride composites prepared by impregnation method

被引:1
作者
Lee, Shu Chin [1 ]
Chew, Wee Shern [2 ]
Lintang, Hendrik O. [1 ]
Yuliati, Leny [1 ]
机构
[1] Univ Teknol Malaysia, Ctr Sustainable Nanomat, Ibnu Sina Inst Sci & Ind Res, Utm Johor Bahru 81310, Johor, Malaysia
[2] Univ Teknol Malaysia, Fac Sci, Dept Chem, Utm Johor Bahru 81310, Johor, Malaysia
来源
MALAYSIAN JOURNAL OF FUNDAMENTAL AND APPLIED SCIENCES | 2015年 / 11卷 / 03期
关键词
carbon nitride; visible light; gallium oxide; cyclohexane;
D O I
10.11113/mjfas.v11n3.375
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
Carbon nitride is a material of interest for photocatalytic reactions due to its catalytic and visible light absorption properties. However, the photocatalytic activity is still low. Hence, modifications must be carried out to improve the photocatalytic activity of carbon nitride. In this work, a series of gallium oxide/carbon nitride composites with various gallium to carbon ratios (Ga/C = 1-50 mol%) was prepared by impregnation method for removal of cyclohexane under visible light irradiation for the first time. The successful preparation of gallium oxide/carbon nitride composites was supported by several characterization techniques. X-ray diffraction (XRD) patterns and diffuse reflectance UV-visible (DR UV-vis) spectra revealed that the increased Ga/C ratio resulted in the increased formation of Ga2O3. Furthermore, all the prepared composite samples also showed visible light absorption up to about 430 nm. In the photocatalytic removal of cyclohexane under 6 h of visible light irradiation, sample with low loading of 1 mol% Ga/C improved the photocatalytic activity of carbon nitride for two times. The high activity obtained on the gallium oxide (1 mol%)/carbon nitride composite clearly suggested the presence of synergic effect between small amount of gallium oxide and carbon nitride when they were combined. This study showed that a visible light-driven gallium oxide/carbon nitride composite could be prepared by impregnating a small amount of gallium oxide on carbon nitride and the composite is a potential photocatalyst for removal of cyclohexane under visible light irradiation.
引用
收藏
页码:98 / 101
页数:4
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