Preparation of RGO/TiO2/Ag Aerogel and Its Photodegradation Performance in Gas Phase Formaldehyde

Haiwang Wang; Guanqi Wang; Yukai Zhang; Yuan Ma; Zhengjie Wu; Dekuan Gao; Rutong Yang; Bingzhu Wang; Xiwei Qi; Jun Yang

doi:10.1038/s41598-019-52541-7

Preparation of RGO/TiO₂/Ag Aerogel and Its Photodegradation Performance in Gas Phase Formaldehyde

Sci Rep. 2019 Nov 8;9(1):16314. doi: 10.1038/s41598-019-52541-7.

Authors

Haiwang Wang^{1

2

3}, Guanqi Wang⁴, Yukai Zhang⁴, Yuan Ma⁴, Zhengjie Wu⁴, Dekuan Gao⁴, Rutong Yang⁴, Bingzhu Wang⁵, Xiwei Qi^{6

7

8}, Jun Yang⁹

Affiliations

¹ School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, PR China. whwdbdx@126.com.
² School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, PR China. whwdbdx@126.com.
³ Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, PR China. whwdbdx@126.com.
⁴ School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, PR China.
⁵ School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, PR China. BingzhuWang@Yeah.net.
⁶ School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, PR China. qxw@mail.neuq.edu.cn.
⁷ School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, PR China. qxw@mail.neuq.edu.cn.
⁸ Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, PR China. qxw@mail.neuq.edu.cn.
⁹ Institute of Process Engineering, Chinese Academy of Sciences, No. 1 North Second Street, Zhongguancun, Beijing, 100190, China.

Abstract

To increase the utilization ratio and catalytic efficiency of the nano TiO₂, The RGO/TiO₂/(Ag) powders and RGO/TiO₂/Ag aerogel photocatalyst were designed and prepared. The composition and microstructure of RGO/TiO₂/(Ag) powders and RGO/TiO₂/Ag aerogel were studied, in addition, the photocatalytic activity of RGO/TiO₂/(Ag) powders and RGO/TiO₂/Ag aerogel was researched by the photocatalytic degradation behavior of formaldehyde solution and formaldehyde gas respectively. The result indicate that TiO₂ is uniformly loaded on the surface of RGO with a particle size of 10 nm to 20 nm. When the amount of graphene oxide added is 1 wt%, RGO/TiO₂ powder has the highest degradation effect on formaldehyde solution, in addition, the introduction of Ag can greatly improve the photocatalytic effect of the sample. The results also show that the pore size of RGO/TiO₂/Ag aerogel is between 7.6 nm and 12.1 nm, and the degradation rate of formaldehyde gas is 77.08% within 2 hours.

Grants and funding

51474061/National Natural Science Foundation of China (National Science Foundation of China)