Citation: Xiao-Hong Yi, Ya Gao, Chong-Chen Wang, Yu-Hang Li, Hong-Yu Chu, Peng Wang. Photocatalytic Cr(Ⅵ) reduction over MIL-88A(Fe) on polyurethane sponge: From batch to continuous-flow operation[J]. Chinese Chemical Letters, ;2023, 34(7): 108029. doi: 10.1016/j.cclet.2022.108029 shu

Photocatalytic Cr(Ⅵ) reduction over MIL-88A(Fe) on polyurethane sponge: From batch to continuous-flow operation

Xiao-Hong Yi ^{a, b} ,
Ya Gao ^{a, b} ,
Chong-Chen Wang ^{a, b, *,} ,
Yu-Hang Li ^{a, b} ,
Hong-Yu Chu ^{a, b} ,
Peng Wang ^{a, b}

a.
Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
b.
Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

wangchongchen@bucea.edu.cn

Received Date: 6 September 2022
Revised Date: 14 November 2022
Accepted Date: 28 November 2022
Available Online: 30 November 2022

Figures(4)

MIL-88A(Fe)@sponge (MS) was synthesized by a dip-coating method, which displayed efficient photocatalytic Cr(Ⅵ) reduction efficiency under both low power LED UV light and real solar light irradiation. It was observed that MS (0.2 g/L) could remove 100% Cr(Ⅵ) (10 mg/L) by adding 0.4 mmol/L tartaric acid (TA) without adjusting pH (pH 5.05) within 6.0 min and 3.0 min under UV light and real solar light irradiation, respectively. Besides, the photo-induced e⁻ and radicals (O₂^•− and CO₂^•−) were found to play the momentous roles in the MS/TA/UVL/Cr(Ⅵ) system by the scavenger experiments and electron spin resonance (ESR) tests. MS was also filled into a fixed-bed reactor to test the possibility of long-term Cr(Ⅵ) reduction operation in TA/UVL system. As expected, the results revealed that MS could still maintain 100% activity up to 60 h. These results demonstrated that MIL-88A(Fe) might be the potentially efficient catalyst for large-scale wastewater treatment in the near future.
- MIL-88A(Fe),
- Polyurethane sponge,
- Cr(Ⅵ) reduction,
- Tartaric acid,
- Continuous operation
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沈阳化工大学材料科学与工程学院沈阳 110142