Citation: Xiuli Wang, Shuai Shen, Zhaochi Feng, Can Li. Time-resolved photoluminescence of anatase/rutile TiO₂ phase junction revealing charge separation dynamics[J]. Chinese Journal of Catalysis, ;2016, 37(12): 2059-2068. doi: 10.1016/S1872-2067(16)62574-3 shu

Time-resolved photoluminescence of anatase/rutile TiO₂ phase junction revealing charge separation dynamics

State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received Date: 12 September 2016
Revised Date: 15 October 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21203185, 21373209) and the National Basic Research Program of China (2014CB239400).

Junctions are an important structure that allows charge separation in solar cells and photocatalysts. Here, we studied the charge transfer at an anatase/rutile TiO₂ phase junction using time-resolved photoluminescence spectroscopy. Visible (~500 nm) and near-infrared (NIR,~830 nm) emissions were monitored to give insight into the photoinduced charges of anatase and rutile in the junction, respectively. New fast photoluminescence decay components appeared in the visible emission of rutile-phase dominated TiO₂ and in the NIR emission of many mixed phase TiO₂ samples. The fast decays confirmed that the charge separation occurred at the phase junction. The visible emission intensity from the mixed phase TiO₂ increased, revealing that charge transfer from rutile to anatase was the main pathway. The charge separation slowed the microsecond time scale photoluminescence decay rate for charge carriers in both anatase and rutile. However, the millisecond decay of the charge carriers in anatase TiO₂ was accelerated, while there was almost no change in the charge carrier dynamics of rutile TiO₂. Thus, charge separation at the anatase/rutile phase junction caused an increase in the charge carrier concentration on a microsecond time scale, because of slower electron-hole recombination. The enhanced photocatalytic activity previously observed at anatase/rutile phase junctions is likely caused by the improved charge carrier dynamics we report here. These findings may contribute to the development of improved photocatalytic materials.
- Titanium dioxide (TiO₂),
- Anatase/rutile phase junction,
- Charge separation,
- Charge recombination,
- Time-resolved photoluminescence
1. [1]
2. [2]
3. [3]
4. [4]
5. [5]
6. [6]
7. [7]
8. [8]
9. [9]
10. [10]
11. [11]
12. [12]
13. [13]
14. [14]
15. [15]
16. [16]
17. [17]
18. [18]
19. [19]
20. [20]
21. [21]
22. [22]
23. [23]
24. [24]
25. [25]
26. [26]
27. [27]
28. [28]
29. [29]
30. [30]
31. [31]
32. [32]
1. [1]
  Xinyu Xu , Jiale Lu , Bo Su , Jiayi Chen , Xiong Chen , Sibo Wang . Steering charge dynamics and surface reactivity for photocatalytic selective methane oxidation to ethane over Au/Ti-CeO₂. Acta Physico-Chimica Sinica, 2025, 41(11): 100153-0. doi: 10.1016/j.actphy.2025.100153
2. [2]
  Yanyan Zhao , Zhen Wu , Yong Zhang , Bicheng Zhu , Jianjun Zhang . Enhancing photocatalytic H₂O₂ production via dual optimization of charge separation and O₂ adsorption in Au-decorated S-vacancy-rich CdIn₂S₄. Acta Physico-Chimica Sinica, 2025, 41(11): 100142-0. doi: 10.1016/j.actphy.2025.100142
3. [3]
  Yuanyin Cui , Jinfeng Zhang , Hailiang Chu , Lixian Sun , Kai Dai . Rational Design of Bismuth Based Photocatalysts for Solar Energy Conversion. Acta Physico-Chimica Sinica, 2024, 40(12): 2405016-0. doi: 10.3866/PKU.WHXB202405016
4. [4]
  Jingzhao Cheng , Shiyu Gao , Bei Cheng , Kai Yang , Wang Wang , Shaowen Cao . Construction of 4-Amino-1H-imidazole-5-carbonitrile Modified Carbon Nitride-Based Donor-Acceptor Photocatalyst for Efficient Photocatalytic Hydrogen Evolution. Acta Physico-Chimica Sinica, 2024, 40(11): 2406026-0. doi: 10.3866/PKU.WHXB202406026
5. [5]
  Pengcheng Yan , Peng Wang , Jing Huang , Zhao Mo , Li Xu , Yun Chen , Yu Zhang , Zhichong Qi , Hui Xu , Henan Li . Engineering Multiple Optimization Strategy on Bismuth Oxyhalide Photoactive Materials for Efficient Photoelectrochemical Applications. Acta Physico-Chimica Sinica, 2025, 41(2): 100014-0. doi: 10.3866/PKU.WHXB202309047
6. [6]
  Jie Guo , Lijun Xue , Fahui Song , Chengpeng Li , Zhuo Chen , Lili Wen . Dual built-in electric field-driven S-scheme heterojunction of D-A COFs/ZnIn₂S₄ for accelerated charge separation toward high-efficiency H₂O₂ photosynthesis in pure water. Acta Physico-Chimica Sinica, 2026, 42(4): 100177-0. doi: 10.1016/j.actphy.2025.100177
7. [7]
  Hequn Yang , Fei Rao , Dean Pan , Liu Chen , Numan Abbas , Gangqiang Zhu . Rare earth praseodymium single atoms on g-C₃N₄ tubes for enhanced in-plane charge transfer towards H₂O₂ production in pure water. Acta Physico-Chimica Sinica, 2026, 42(6): 100210-. doi: 10.1016/j.actphy.2025.100210
8. [8]
  Ke Li , Chuang Liu , Jingping Li , Guohong Wang , Kai Wang . Architecting Inorganic/Organic S-Scheme Heterojunction of Bi₄Ti₃O₁₂ Coupling with g-C₃N₄ for Photocatalytic H₂O₂ Production from Pure Water. Acta Physico-Chimica Sinica, 2024, 40(11): 2403009-0. doi: 10.3866/PKU.WHXB202403009
9. [9]
  Jiaqi Yang , Xuqiang Hao , Jiejie Jing , Yuqiang Hao , Zhiliang Jin . 3D/2D ReSe₂/ZnCdS S-scheme photocatalyst with efficient interfacial charge separation for optimized hydrogen production. Acta Physico-Chimica Sinica, 2025, 41(10): 100131-0. doi: 10.1016/j.actphy.2025.100131
10. [10]
  Lingling Li , Zhe Chen . Charge transfer mechanism investigation of S-scheme photocatalyst using soft X-ray absorption spectroscopy. Acta Physico-Chimica Sinica, 2026, 42(4): 100215-0. doi: 10.1016/j.actphy.2025.100215
11. [11]
  Weilai Yu , Chuanbiao Bie . Unveiling S-Scheme Charge Transfer Mechanism. Acta Physico-Chimica Sinica, 2024, 40(4): 2307022-0. doi: 10.3866/PKU.WHXB202307022
12. [12]
  Yuejiao An , Wenxuan Liu , Yanfeng Zhang , Jianjun Zhang , Zhansheng Lu . Revealing Photoinduced Charge Transfer Mechanism of SnO₂/BiOBr S-Scheme Heterostructure for CO₂ Photoreduction. Acta Physico-Chimica Sinica, 2024, 40(12): 2407021-0. doi: 10.3866/PKU.WHXB202407021
13. [13]
  Jiajie Cai , Chang Cheng , Bowen Liu , Jianjun Zhang , Chuanjia Jiang , Bei Cheng . CdS/DBTSO-BDTO S-scheme photocatalyst for H₂ production and its charge transfer dynamics. Acta Physico-Chimica Sinica, 2025, 41(8): 100084-0. doi: 10.1016/j.actphy.2025.100084
14. [14]
  Danfeng Yi , Yulin Li . MOF/MOF nanosheets S-scheme heterojunction for accelerated charge kinetics and efficient photocatalytic H₂ evolution. Acta Physico-Chimica Sinica, 2026, 42(4): 100220-0. doi: 10.1016/j.actphy.2025.100220
15. [15]
  Lin Song , Dourong Wang , Biao Zhang . Innovative Experimental Design and Research on Preparing Flexible Perovskite Fluorescent Gels Using 3D Printing. University Chemistry, 2024, 39(7): 337-344. doi: 10.3866/PKU.DXHX202310107
16. [16]
  Fan JIA , Wenbao XU , Fangbin LIU , Haihua ZHANG , Hongbing FU . Synthesis and electroluminescence properties of Mn²⁺ doped quasi-two-dimensional perovskites (PEA)₂Pb_yMn_1-yBr₄. Chinese Journal of Inorganic Chemistry, 2024, 40(6): 1114-1122. doi: 10.11862/CJIC.20230473
17. [17]
  Nian LIU , Biao ZHENG , Kun WANG , Chunbao ZHENG , Qingyan HAN , Enjie HE , Saidong XUE . Synthesis and spectroscopic performance of double perovskite Li_0.5La_0.5MgSrWO₆∶Mn⁴⁺ phosphors for plant growth lighting. Chinese Journal of Inorganic Chemistry, 2026, 42(1): 129-140. doi: 10.11862/CJIC.20250069
18. [18]
  Jizhou Liu , Chenbin Ai , Chenrui Hu , Bei Cheng , Jianjun Zhang . Accelerated Interfacial Electron Transfer in Perovskite Solar Cell by Ammonium Hexachlorostannate Modification and fs-TAS Investigation. Acta Physico-Chimica Sinica, 2024, 40(11): 2402006-0. doi: 10.3866/PKU.WHXB202402006
19. [19]
  Peng Li , Yuanying Cui , Zhongliao Wang , Graham Dawson , Chunfeng Shao , Kai Dai . Efficient interfacial charge transfer of CeO₂/Bi₁₉Br₃S₂₇ S-scheme heterojunction for boosted photocatalytic CO₂ reduction. Acta Physico-Chimica Sinica, 2025, 41(6): 100065-0. doi: 10.1016/j.actphy.2025.100065
20. [20]
  Weikang Wang , Yadong Wu , Jianjun Zhang , Kai Meng , Jinhe Li , Lele Wang , Qinqin Liu . Green H₂O₂ synthesis via melamine-foam supported S-scheme Cd_0.5Zn_0.5In₂S₄/S-doped carbon nitride heterojunction: synergistic interfacial charge transfer and local photothermal effect. Acta Physico-Chimica Sinica, 2025, 41(8): 100093-0. doi: 10.1016/j.actphy.2025.100093

Get Citation

PDF

XML

Metrics

PDF Downloads(4)
Abstract views(1473)
HTML views(121)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Time-resolved photoluminescence of anatase/rutile TiO2 phase junction revealing charge separation dynamics

Metrics

通讯作者: 陈斌, bchen63@163.com

Time-resolved photoluminescence of anatase/rutile TiO₂ phase junction revealing charge separation dynamics