Spontaneous Exciton Dissociation in Sc-Doped Rutile TiO 2 for Photocatalytic Overall Water Splitting with an Apparent Quantum Yield of 30%
University of Science and Technology of China · Chinese Academy of Sciences · +1 more institution
Abstract
Achieving high-efficiency photocatalytic overall water splitting with earth-abundant materials like TiO2 under ambient conditions is a compelling renewable energy solution. However, this remains challenging due to both the presence of rich deep-level defects and lack of strong driving force in particulate photocatalysts, limiting the separation of photogenerated charges. Here, we developed a scandium (Sc)-doped rutile TiO2 with fully passivated detrimental Ti3+ defects and very strong built-in electric field arising from engineered (101)/(110) facet junctions. The Sc3+ doping enables a much lower exciton binding energy of 8.2 meV (28.6 meV for undoping) than room-temperature thermal fluctuation energy,…
Citation impact
- FWCI
- 23.54
- Percentile
- 100%
- References
- 46
Authors
8- FQFei Qin
University of Science and Technology of China, Chinese Academy of Sciences
- YKYuyang Kang
University of Science and Technology of China, Chinese Academy of Sciences
- XSXingyuan San
Hebei University
- YTYun‐Long Tang
University of Science and Technology of China, Chinese Academy of Sciences
- JLJianjun Li
University of Science and Technology of China, Chinese Academy of Sciences
Topics & keywords
- Chemistry
- Rutile
- Quantum yield
- Photocatalysis
- Doping
- Dissociation (chemistry)
- Exciton
- Yield (engineering)
- Clean water and sanitation