1. Advanced flexible photocatalytic fuel cell using TiO2/carbon quantum dots photoanode for green electricity production.
- Author
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Zhang, Shijie, Tang, Jixia, Chen, Weiyu, Qian, Tu, Li, Xuechen, Feng, Zixuan, He, Jie, Zhang, Rui, Yang, Zhengchun, Li, Huayi, Pan, Peng, Zhang, Kailiang, Zheng, Lingcheng, and Feng, Deqiang
- Subjects
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FUEL cells , *ORGANIC wastes , *TITANIUM dioxide , *POWER electronics , *SEWAGE purification , *FLEXIBLE electronics , *ELECTRICITY , *PHOTOCATHODES - Abstract
Flexible electronics have attracted great attention in recent years. However, the matching power sources of these flexible electronics now are mostly rigid, greatly hindering the way of all-flexible electronics. Here, a flexible photocatalytic fuel cell (fPFC) was designed to produce a stable energy output (highest power density of 40.1 mW·cm−2·g−1 in artificial sweat) while purify wasted water simultaneously. The fPFC is consisted of TiO 2 /carbon quantum dots (CQDs) photoanode and Ag cathode. The experimental results show that the combination of TiO 2 and CQDs can broaden the range of light absorption of TiO 2. Thus, the photocurrent density of TiO 2 /CQDs fPFC can reach up to 252.3 mA·cm−2·g−1, while the photocurrent density of pure TiO 2 fPFC is 87.4 mA·cm−2·g−1. The photocurrent density of TiO 2 /CQDs fPFC is 188.7% higher than that of TiO 2 fPFC. The maximum power density of TiO 2 /CQDs fPFC in flatting state is about 40.1 mW·cm−2·g−1. This TiO 2 /CQDs fPFC has better performance than fPFC in other literature. Besides, TiO 2 /CQDs fPFC in the bending state can also achieve a good performance. Four fPFCs can be easily constructed into a bracelet and generate electricity, and there is no significant change in opening voltage under flatting and bending states. This eco-friendly system has great potential in energy conservation and portable electronics, and can be applied in the following aspects: (i) wearable technology that utilizes organic waste for power generation; (ii) flexible configuration of traditional sewage treatment. A flexible photocatalytic fuel cell (fPFC) based on TiO 2 /carbon quantum dots (CQDs) photoanode has been fabricated for treating organic waste and efficiently generating electricity. The bracelet made by four bending fPFCs in series still has a high photocurrent density and power density. [Display omitted] • The prepared TiO 2 /CQDs fPFC has good performance in bending. • TiO 2 /CQDs broadens the light absorption range of pure TiO 2. • TiO 2 /CQDs fPFC can treat organic waste and produce electricity efficiently. • The TiO 2 /CQDs fPFC has high photocurrent density (252.3 mA·cm−2·g−1) and power density (40.1 mW·cm−2·g−1). [ABSTRACT FROM AUTHOR]
- Published
- 2024
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