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8221035 
Journal Article 
Recycling of spent alkaline Zn-Mn batteries directly: Combination with TiO2 to construct a novel Z-scheme photocatalytic system 
Zhao, Z; Shen, B; Hu, Z; Zhang, J; He, C; Yao, Yan; Guo, SQi; Dong, Fan; , 
2020 
Yes 
Journal of Hazardous Materials
ISSN: 0304-3894
EISSN: 1873-3336 
ELSEVIER 
AMSTERDAM 
123236 
32947685 
WOS:000571472900006 
Recycling of spent alkaline Zn-Mn batteries (S-AZMB) has always been a focus of attention in environmental and energy fields. However, the current research mostly concentrated in the recovery of purified materials, and ignores the direct reuse of S-AZMB. Herein, we propose a new concept for the first time that unpurified S-AZMB can be used as raw materials for preparation of Z-scheme photocatalytic system in combination with TiO2. A series of characterizations and experiments confirm that the combination with S-AZMB not only extends the response of TiO2 to visible light, but also significantly enhances the separation ability of photogenerated electron-hole pairs. In the toluene removal experiment, the degradation kinetic rate of Z-scheme TiO2@S-AZMB photocatalyst reaches 21.0 and 10.5 times than that of TiO2 and S-AZMB, respectively. More notably, this SAZMB based Z-scheme photocatalyst can maintain structural and photocatalytic performance stability in cyclic catalytic reactions. We believe that this work not only expands the research concept of recycling S-AZMB, but also provides a new idea for designing highly efficient Z-scheme photocatalysts.