Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (5): 808-816.DOI: 10.1016/S1872-2067(20)63688-9
• Articles • Previous Articles Next Articles
Qian Dinga,b, Tao Chena,c, Zheng Lia, Zhaochi Fenga, Xiuli Wanga,*()
Received:
2020-05-01
Accepted:
2020-05-01
Online:
2021-05-18
Published:
2021-01-29
Contact:
Xiuli Wang
About author:
* Tel: +86-411-84379027; Fax: +86-411-84694447; E-mail: xiuliwang@dicp.ac.cn† These authors equally contributed to the work.
Supported by:
Qian Ding, Tao Chen, Zheng Li, Zhaochi Feng, Xiuli Wang. Time-resolved infrared spectroscopic investigation of Ga2O3 photocatalysts loaded with Cr2O3-Rh cocatalysts for photocatalytic water splitting[J]. Chinese Journal of Catalysis, 2021, 42(5): 808-816.
Add to citation manager EndNote|Ris|BibTeX
URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(20)63688-9
Fig. 1. Photocatalytic activities of the photocatalysts. 0.1 g photocatalyst was dispersed into 500 mL deionized water and irradiated with a 450 W mercury lamp.
Fig. 4. Time-resolved IR absorption spectra of Rh/Ga2O3 in air recorded in the step-scan measurement mode. A 1 Hz, 266 nm laser was used to excite the sample. The inset shows the normalized decay curves at 1480, 1300, and 900 cm-1.
Fig. 4. Time-resolved IR absorption spectra of Rh/Ga2O3 in air recorded in the step-scan measurement mode. A 1 Hz, 266 nm laser was used to excite the sample. The inset shows the normalized decay curves at 1480, 1300, and 900 cm-1.
Fig. 5. Transient MIR absorption decays of Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Fig. 5. Transient MIR absorption decays of Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
τ50%/μs | in vacuum | in H2O | in O2 |
---|---|---|---|
Ga2O3 | 31 | 31 | 31 |
Cr2O3/Ga2O3 | 31 | 53 | 31 |
Rh/Ga2O3 | 21 | 12 | 21 |
Cr2O3-Rh/Ga2O3 | 12 | 10 | 12 |
Table 1 Lifetimes (τ50%) of Ga2O3-based photocatalysts in vacuum, water vapor, and O2.
τ50%/μs | in vacuum | in H2O | in O2 |
---|---|---|---|
Ga2O3 | 31 | 31 | 31 |
Cr2O3/Ga2O3 | 31 | 53 | 31 |
Rh/Ga2O3 | 21 | 12 | 21 |
Cr2O3-Rh/Ga2O3 | 12 | 10 | 12 |
τ50%/μs | in vacuum | in H2O | in O2 |
---|---|---|---|
Ga2O3 | 31 | 31 | 31 |
Cr2O3/Ga2O3 | 31 | 53 | 31 |
Rh/Ga2O3 | 21 | 12 | 21 |
Cr2O3-Rh/Ga2O3 | 12 | 10 | 12 |
Table 1 Lifetimes (τ50%) of Ga2O3-based photocatalysts in vacuum, water vapor, and O2.
τ50%/μs | in vacuum | in H2O | in O2 |
---|---|---|---|
Ga2O3 | 31 | 31 | 31 |
Cr2O3/Ga2O3 | 31 | 53 | 31 |
Rh/Ga2O3 | 21 | 12 | 21 |
Cr2O3-Rh/Ga2O3 | 12 | 10 | 12 |
Fig. 6. Transient MIR absorption decays of Cr2O3/Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Fig. 6. Transient MIR absorption decays of Cr2O3/Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Fig. 7. Transient MIR absorption decays of Rh/Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Fig. 7. Transient MIR absorption decays of Rh/Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Fig. 8. Transient MIR absorption decays of Cr2O3-Rh/Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Fig. 8. Transient MIR absorption decays of Cr2O3-Rh/Ga2O3 in vacuum (1), water vapor (2), and oxygen (3) excited by a 1 Hz, 266 nm laser pulse. The inset shows the normalized transient MIR absorption profiles.
Scheme 1. Schematic model of working mechanisms of Rh or Rh-Cr2O3 in photocatalytic water splitting on Rh/Ga2O3 or Cr2O3-Rh/Ga2O3. Blue arrows indicate the photocatalytic redox reactions. Black arrows indicate the photogenerated charge transfer processes. The thickness of the black solid arrow lines indicates the relative contents of the transfer path, where thicker arrow lines represent higher content than the thinner ones. The dashed lines indicate the possible charge transfer.
Scheme 1. Schematic model of working mechanisms of Rh or Rh-Cr2O3 in photocatalytic water splitting on Rh/Ga2O3 or Cr2O3-Rh/Ga2O3. Blue arrows indicate the photocatalytic redox reactions. Black arrows indicate the photogenerated charge transfer processes. The thickness of the black solid arrow lines indicates the relative contents of the transfer path, where thicker arrow lines represent higher content than the thinner ones. The dashed lines indicate the possible charge transfer.
|
[1] | Zicong Jiang, Bei Cheng, Liuyang Zhang, Zhenyi Zhang, Chuanbiao Bie. A review on ZnO-based S-scheme heterojunction photocatalysts [J]. Chinese Journal of Catalysis, 2023, 52(9): 32-49. |
[2] | Binbin Zhao, Wei Zhong, Feng Chen, Ping Wang, Chuanbiao Bie, Huogen Yu. High-crystalline g-C3N4 photocatalysts: Synthesis, structure modulation, and H2-evolution application [J]. Chinese Journal of Catalysis, 2023, 52(9): 127-143. |
[3] | Xiaolong Tang, Feng Li, Fang Li, Yanbin Jiang, Changlin Yu. Single-atom catalysts for the photocatalytic and electrocatalytic synthesis of hydrogen peroxide [J]. Chinese Journal of Catalysis, 2023, 52(9): 79-98. |
[4] | Fei Yan, Youzi Zhang, Sibi Liu, Ruiqing Zou, Jahan B Ghasemi, Xuanhua Li. Efficient charge separation by a donor-acceptor system integrating dibenzothiophene into a porphyrin-based metal-organic framework for enhanced photocatalytic hydrogen evolution [J]. Chinese Journal of Catalysis, 2023, 51(8): 124-134. |
[5] | Xiao-Juan Li, Ming-Yu Qi, Jing-Yu Li, Chang-Long Tan, Zi-Rong Tang, Yi-Jun Xu. Visible light-driven dehydrocoupling of thiols to disulfides and H2 evolution over PdS-decorated ZnIn2S4 composites [J]. Chinese Journal of Catalysis, 2023, 51(8): 55-65. |
[6] | Defa Liu, Bin Sun, Shuojie Bai, Tingting Gao, Guowei Zhou. Dual co-catalysts Ag/Ti3C2/TiO2 hierarchical flower-like microspheres with enhanced photocatalytic H2-production activity [J]. Chinese Journal of Catalysis, 2023, 50(7): 273-283. |
[7] | Han-Zhi Xiao, Bo Yu, Si-Shun Yan, Wei Zhang, Xi-Xi Li, Ying Bao, Shu-Ping Luo, Jian-Heng Ye, Da-Gang Yu. Photocatalytic 1,3-dicarboxylation of unactivated alkenes with CO2 [J]. Chinese Journal of Catalysis, 2023, 50(7): 222-228. |
[8] | Jingxiang Low, Chao Zhang, Ferdi Karadas, Yujie Xiong. Photocatalytic CO2 conversion: Beyond the earth [J]. Chinese Journal of Catalysis, 2023, 50(7): 1-5. |
[9] | Huijie Li, Manzhou Chi, Xing Xin, Ruijie Wang, Tianfu Liu, Hongjin Lv, Guo-Yu Yang. Highly selective photoreduction of CO2 catalyzed by the encapsulated heterometallic-substituted polyoxometalate into a photo-responsive metal-organic framework [J]. Chinese Journal of Catalysis, 2023, 50(7): 343-351. |
[10] | Qing Niu, Linhua Mi, Wei Chen, Qiujun Li, Shenghong Zhong, Yan Yu, Liuyi Li. Review of covalent organic frameworks for single-site photocatalysis and electrocatalysis [J]. Chinese Journal of Catalysis, 2023, 50(7): 45-82. |
[11] | Cheng Liu, Mengning Chen, Yingzhang Shi, Zhiwen Wang, Wei Guo, Sen Lin, Jinhong Bi, Ling Wu. Ultrathin ZnTi-LDH nanosheet: A bifunctional Lewis and Brönsted acid photocatalyst for synthesis of N-benzylideneanilline via a tandem reaction [J]. Chinese Journal of Catalysis, 2023, 49(6): 102-112. |
[12] | Haibo Zhang, Zhongliao Wang, Jinfeng Zhang, Kai Dai. Metal-sulfide-based heterojunction photocatalysts: Principles, impact, applications, and in-situ characterization [J]. Chinese Journal of Catalysis, 2023, 49(6): 42-67. |
[13] | Huizhen Li, Yanlei Chen, Qing Niu, Xiaofeng Wang, Zheyuan Liu, Jinhong Bi, Yan Yu, Liuyi Li. The crystalline linear polyimide with oriented photogenerated electron delivery powering CO2 reduction [J]. Chinese Journal of Catalysis, 2023, 49(6): 152-159. |
[14] | Zhidong Wei, Jiawei Yan, Weiqi Guo, Wenfeng Shangguan. Nanoscale lamination effect by nitrogen-deficient polymeric carbon nitride growth on polyhedral SrTiO3 for photocatalytic overall water splitting: Synergy mechanism of internal electrical field modulation [J]. Chinese Journal of Catalysis, 2023, 48(5): 279-289. |
[15] | Fangpei Ma, Qingping Tang, Shibo Xi, Guoqing Li, Tao Chen, Xingchen Ling, Yinong Lyu, Yunpeng Liu, Xiaolong Zhao, Yu Zhou, Jun Wang. Benzimidazole-based covalent organic framework embedding single-atom Pt sites for visible-light-driven photocatalytic hydrogen evolution [J]. Chinese Journal of Catalysis, 2023, 48(5): 137-149. |
Viewed | ||||||
Full text |
|
|||||
Abstract |
|
|||||