Citation: Ran Maoxi, Chen Peng, Li Jiarui, Cui Wen, Li Jieyuan, He Ye, Sheng Jianping, Sun Yanjuan, Dong Fan. Promoted reactants activation and charge separation leading to efficient photocatalytic activity on phosphate/potassium co-functionalized carbon nitride[J]. Chinese Chemical Letters, ;2019, 30(4): 875-880. doi: 10.1016/j.cclet.2019.03.016 shu

Promoted reactants activation and charge separation leading to efficient photocatalytic activity on phosphate/potassium co-functionalized carbon nitride

Ran Maoxi ^a,b ,
Chen Peng ^a,b ,
Li Jiarui ^a,b ,
Cui Wen ^b,c ,
Li Jieyuan ^b,d ,
He Ye ^b ,
Sheng Jianping ^b,**, ,
Sun Yanjuan ^a,b ,
Dong Fan ^a,b,*,

a.
Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
b.
Research Center for Environmental Science & Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
c.
3The Center of New Energy Materials and Technology, School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
d.
College of Architecture and Environment, Sichuan University, Chengdu 610065, China

jpshengchn@163.com

dfctbu@126.com

Received Date: 9 February 2019
Revised Date: 6 March 2019
Accepted Date: 7 March 2019
Available Online: 14 April 2019

Figures(7)

Photocatalytic technology has been widely adopted to address the issue of air pollution. The separation of photogenerated carriers and the activation of reactants on catalyst surface are the main factors that affect the photocatalytic efficiency. Here, the phosphate/potassium (PO₄/K) cofunctionalized carbon nitride (labeled as PO₄-CN-K) was synthesized via a one-step in situ copyrolysis of thiourea and potassium phosphate. The unique electronic structure of PO₄-CN-K could significantly improve the performance of photocatalytic NO purification. The enhanced activity of PO₄-CN-K can be attributed to the promoted activation capacity for O₂, NO and H₂O on the catalyst surface, the decreased of carriers recombination, benefiting from the co-functionalization of phosphate groups on the surface of CN and the construction of K channels between CN layers. The photocatalytic NO conversion pathway is disclosed through time-dependent in situ FT-IR, indicating that PO₄-CN-K can efficiently convert NO molecules into harmless nitrate via the NO→NO⁺→nitrate/nitrite routes. The research provides a novel strategy to impel the development of photocatalytic technology for efficient air purification.
- Photocatalysis,
- Carbon nitride,
- Co-functionalization,
- NO conversion process,
- In situ FT-IR
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