Chinese Journal of Catalysis ›› 2023, Vol. 46: 91-102.DOI: 10.1016/S1872-2067(22)64159-7
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Chengcheng Chena, Fangting Liua, Qiaoyu Zhanga, Zhengguo Zhanga,c, Qiong Liub,*(), Xiaoming Fanga,c,*()
Received:
2022-09-29
Accepted:
2022-11-02
Online:
2023-03-18
Published:
2023-02-21
Contact:
*E-mail: cexmfang@scut.edu.cn (X. Fang), liuqiong@fenxi.com.cn (Q. Liu)
Supported by:
Chengcheng Chen, Fangting Liu, Qiaoyu Zhang, Zhengguo Zhang, Qiong Liu, Xiaoming Fang. Theoretical design and experimental study of pyridine-incorporated polymeric carbon nitride with an optimal structure for boosting photocatalytic CO2 reduction[J]. Chinese Journal of Catalysis, 2023, 46: 91-102.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(22)64159-7
Fig. 1. The DFT model structures of BCN (a), CN-N2 (b) and CN-N3 (c), calculated band gaps of BCN (d), CN-N2 (e) and CN-N3(f), and density of states of BCN (g), CN-N2 (h) and CN-N3 (i).
Fig. 2. The DFT model structure of CO2 molecule on BCN (a), CO2 on CN-N2 (b), CO2 on CN-N3 (c), together with the electron density difference of CO2 on BCN(d), CO2 on CN-N2(e), CO2 on CN-N3 (f).
Fig. 3. XPS high resolution C 1s (a) and N 1s (b) spectra of BCN, CN-5%AP and CN-10%AP. (c) The XANES C K-edge profiles of BCN and CN-5%AP. (d) Solid-state 13C MAS NMR spectra of BCN and CN-5%AP. (e) TGA curves of urea, AP, and their mixture (the inset is the enlarge profile range from 200 to 300 °C). (f) High resolution mass spectrum of the product prepared by heating the mixture consisting of urea and 5% AP at 200 °C for 30 min.
Fig. 4. DRS spectra (a), the Kubelk-Munk function (b) and PL emission spectra (c) of BCN, CN-3%AP, CN-5%AP and CN-7%AP. (d) Time-resolved PL decay spectra of BCN and CN-5%AP.
Fig. 5. CO release rate (a) and selectivity (b) of BCN and CN-x%AP under the illumination of a LED of 3 W. (c) A comparison in CO release rate between BCN and CN-5%AP under irradiation of the 300 W Xe lamp. (d) The AQE of CN-5%AP.
Fig. 6. CO2 TPD (a) and CO2 absorption uptake (b) of BCN and CN-5%AP and reaction coordination path (c) over BCN and CN-N2. (d) In situ FTIR spectra for the adsorption and activation of CO2 on CN-5%AP.
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