活性炭上MOCVD沉积TiO2光催化剂

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL Carbon Pub Date : 2006-02-01 DOI:10.1016/j.carbon.2005.07.033

Xingwang Zhang, Minghua Zhou, Lecheng Lei

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引用次数: 88

摘要

以HNO3改性活性炭为载体，采用金属有机化学气相沉积(MOCVD)法制备TiO2。HNO3改性增大了活性炭的介孔表面积，表明介孔尺寸增大。HNO3改性活性炭表面含氧基团的浓度明显高于原活性炭。结果表明，用6 mol/L HNO3对活性炭进行改性后，TiO2的沉积速率提高了4.5倍。HNO3对活性炭的改性显著提高了TiO2的光催化活性，形成了粒径更小、分散良好的TiO2颗粒，XRD和N2吸附-脱附等温线结果证实了这一点。

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TiO2 photocatalyst deposition by MOCVD on activated carbon

Activated carbon modified by HNO₃ was used as the support during the production of TiO₂ by metal organic chemical vapor deposition (MOCVD). The HNO₃ modification increased mesopores surface area of activated carbon indicating the size of pores increased. The concentration of surface oxygen bearing groups on the HNO₃ modified activated carbon was much higher than that of the original activated carbon. It was found that a modification of activated carbon by 6 mol/L HNO₃ increased the deposition rate of TiO₂ by 4.5 times. The modification of activated carbon by HNO₃ significantly raised the photocatalytic activity of TiO₂ resulting from the formation of smaller-sized TiO₂ particles well dispersed confirmed by the results of XRD patterns and N₂ adsorption–desorption isotherms.

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.