Efficient adsorption and sustainable degradation of gaseous acetaldehyde and o-xylene using rGO-TiO2 photocatalyst

doi:10.1016/j.cej.2018.05.107

	Efficient adsorption and sustainable degradation of gaseous acetaldehyde and o-xylene using rGO-TiO2 photocatalyst
	Lin, Wenjiao 1; Xie, Xiaofeng ; Wang, Xiao ; Wang, Yan ; Segets, Doris 2; Sun, Jing
刊名	CHEMICAL ENGINEERING JOURNAL
	2018
卷号	349 页码:708
关键词	rGO-TiO2 Photocatalysis Acetaldehyde O-xylene VOCs removal
ISSN号	1385-8947
DOI	10.1016/j.cej.2018.05.107
英文摘要	Two types of volatile organic chemicals (VOCs), acetaldehyde and o-xylene, were selected to probe the different adsorption and photodegradation mechanism of gaseous photocatalysis. Reduced graphene oxide (rGO)-TiO2 nanocomposites were prepared by facile solvothermal process to perform the photocatalytic reactions. In the experiments, the removal efficiencies of the acetaldehyde and o-xylene at 80 mLmin(-1) flow rate were only 15% and 12% when P25 was applied, while the efficiencies were sharply increased to 42% and 54% by using 0.5 wt% rGO-TiO2 as the photocatalyst, respectively. Interestingly, it is notable that the removal efficiency of o-xylene was higher than that of acetaldehyde with identical rGO-TiO2 photocatalyst. Experiments suggested that there were possibly two reasons. Firstly, the adsorbance of o-xylene was more than that of acetaldehyde owing to the at-at conjugation between rGO and aromatic compounds, which was proved by adsorption equilibrium and TPD tests. ESA tests proved that rGO can promote the generation of surface (OH)-O-center dot radicals and depress the O-center dot(2)- radicals formation. Compared with the dominant role played by O-center dot(2)- radicals in the degradation of acetaldehyde, an almost equal position of O-center dot(2)- and 'OH radicals was observed in the degradation of o-xylene according to the subsequent radical scavenger experiments. Moreover, the optimized rGO-TiO2 exhibited sustainable photocatalytic activity at 40-120 mLmin(-1) flow rate through 160 min tests, while P25 was deactivate only after 25 min. This work demonstrated the different adsorption and degradation characteristics of two types of VOCs, which could propel the target orientation design of photocatalyst in VOCs removal applications.
学科主题	Engineering, Environmental ; Engineering, Chemical
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000437090400070
资助机构	This work was financially supported by the National Key Research and Development Program of China (2016YFA0203000), the International Partnership Program of Chinese Academy of Sciences (GJHZ1656) and the NSFC-DFG bilateral organization program (51761135107 and SE 2526-3/1). DS acknowledges financial support by DFG within the Cluster of Excellence "Engineering of Advanced Materials" (project EXC 315) (Bridge Funding). ; This work was financially supported by the National Key Research and Development Program of China (2016YFA0203000), the International Partnership Program of Chinese Academy of Sciences (GJHZ1656) and the NSFC-DFG bilateral organization program (51761135107 and SE 2526-3/1). DS acknowledges financial support by DFG within the Cluster of Excellence "Engineering of Advanced Materials" (project EXC 315) (Bridge Funding).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24664]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China 3.Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol LFG, D-91058 Erlangen, Germany
推荐引用方式 GB/T 7714	Lin, Wenjiao,Xie, Xiaofeng,Wang, Xiao,et al. Efficient adsorption and sustainable degradation of gaseous acetaldehyde and o-xylene using rGO-TiO2 photocatalyst[J]. CHEMICAL ENGINEERING JOURNAL,2018,349:708, 718.
APA	Lin, Wenjiao,Xie, Xiaofeng,Wang, Xiao,Wang, Yan,Segets, Doris,&Sun, Jing.(2018).Efficient adsorption and sustainable degradation of gaseous acetaldehyde and o-xylene using rGO-TiO2 photocatalyst.CHEMICAL ENGINEERING JOURNAL,349,708.
MLA	Lin, Wenjiao,et al."Efficient adsorption and sustainable degradation of gaseous acetaldehyde and o-xylene using rGO-TiO2 photocatalyst".CHEMICAL ENGINEERING JOURNAL 349(2018):708.