Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (10): 1648-1658.DOI: 10.1016/S1872-2067(21)63805-6
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Libo Wanga,b, Bicheng Zhuc, Bei Chenga, Jianjun Zhanga, Liuyang Zhanga, Jiaguo Yua,b,d()
Received:
2021-02-06
Accepted:
2021-03-16
Online:
2021-10-18
Published:
2021-06-20
Contact:
Jiaguo Yu
About author:
Jiaguo Yu received his BS and MS in chemistry from Central China Normal University and Xi’an Jiaotong University, respectively; his PhD in Materials Science from Wuhan University of Technology (WUT). In 2000, he became a Professor at WUT. His research interests include semiconductor photocatalysis, photocatalytic hydrogen production, CO2 reduction, dye-sensitized and perovskite Solar cells, indoor air purification and adsorption, supercapacitor, electrocatalysis and so on. He is Thomson Reuters "Hottest Researcher" of 2012. His name is also in the lists of 2014−2020 Highly Cited Researchers from Clarivate Analytics (Thomson Reuters) in Materials Science, Chemistry and Engineering. He is Foreign Member of Academia Europaea (The Academy of Europe) (2020), Foreign Fellow of the European Academy of Sciences (2020) and Fellow of the Royal Society of Chemistry (2015). He was appointed as the Associate Editor of Chin. J. Catal. in 2020.
Supported by:
Libo Wang, Bicheng Zhu, Bei Cheng, Jianjun Zhang, Liuyang Zhang, Jiaguo Yu. In-situ preparation of TiO2/N-doped graphene hollow sphere photocatalyst with enhanced photocatalytic CO2 reduction performance[J]. Chinese Journal of Catalysis, 2021, 42(10): 1648-1658.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63805-6
Fig. 1. (a) Schematic illustration of TiO2/NG HS preparation processes; (b,c) FESEM images of SiO2/TiO2 spheres and TiO2/NG HS; TEM (d) and its corresponding HRTEM (e) image of TiO2/NG HS; (f) HAADF image of TiO2/NG HS; (g-j) EDS mapping images of Ti, O, N and C elements.
Fig. 4. (a) XPS survey spectra of TiO2 and TiO2/NG HS; XPS spectra of O 1s (b) and Ti 2p (c) of TiO2 and TiO2/NG HS in darkness or in light; (d) XPS spectra of N 1s of TiO2/NG HS in the dark or in light.
Fig. 6. The Ead of CO2 on pyridinic N atom (a), graphitic N atom (b) and graphitic C atom (c) in NG, as well as graphitic C atom (d) in graphene, respectively.
Sample | Pore volume (cm3 g-1) | Average pore size (nm) | ABET (m2 g-1) |
---|---|---|---|
TiO2 | 0.24 | 14 | 77 |
TiO2/NG | 0.22 | 12 | 79 |
TiO2/G | 0.27 | 13 | 77 |
Table 1 Physical properties of samples.
Sample | Pore volume (cm3 g-1) | Average pore size (nm) | ABET (m2 g-1) |
---|---|---|---|
TiO2 | 0.24 | 14 | 77 |
TiO2/NG | 0.22 | 12 | 79 |
TiO2/G | 0.27 | 13 | 77 |
Fig. 10. In-situ DRIFT spectra of TiO2/NG HS. (a) Without flowing CO2/H2O gas in darkness; (b-d) with flowing CO2/H2O gas for 20-60 min in darkness; (e-g) with flowing CO2/H2O gas for 20-60 min with irradiation.
Fig. 12. (a) CPD spectra of samples; (b-d) diagram of PCR reaction mechanism over TiO2/NG HS. Ef(dark): Ef in the dark; Ef(light): Ef under light irradiation; Evac: vacuum energy. (b) Before contact, (c) after contact, and (d) under light irradiation.
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