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Novel 3D cross-shaped Zn/Co bimetallic zeolite imidazolate frameworks for simultaneous removal Cr(VI) and Congo Red

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Abstract

The photocatalytic properties of Zn/Co zeolite imidazolate frameworks (ZIF-ZnCo) prepared by various Zn/Co ratio are of significantly diversity due to the morphology structure of the ZIF-ZnCo. Thereinto, the prepared ZIF-ZnCO-8:1 is excellent capability by virtue of its 3D cross-shaped structure. Spectral test results show that as-prepared novel 3D cross-shaped ZIF-ZnCo has a lower recombination rate of electron and hole pairs than the lamellar and dodecahedral, thus improving the photocatalytic ability. The photocatalytic ability of 3D cross-shaped ZIF-ZnCo was carefully investigated for removing mixed solution of Congo Red (CR) and Cr(VI). The photocatalytic reduction ability of 3D cross-shaped ZIF-ZnCo was 22% higher than ZIF-8 for Cr(VI). Meanwhile, CR was altogether removed at dark processing and Cr(VI) was removed 70% after dark processing 120 min and photocatalytic 240 min. Therefore, the high adsorption and photocatalytic capacity denote the potential application of 3D cross-shaped ZIF-ZnCo.

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The datasets generated and/or analyzed during the current study are not publicly available due confidentiality but are available from the corresponding author on reasonable request.

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Acknowledgements

This work was supported by the Natural Science Foundation of Southwest University of Science and Technology (15zx7125), the Foundation of Post-doctoral Scientific Research Station of Wengfu (Group) Co., Ltd. (No. YF(2020)022), and the Foundation of National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization (SF201906).

Funding

Funding for this study was received from the Natural Science Foundation of Southwest University of Science and Technology (15zx7125), the Foundation of Post-doctoral Scientific Research Station of Wengfu (Group) Co., Ltd. (No. YF(2020)022) and the Foundation of National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization (SF201906).

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Qin Luo and Xiaofeng Huang proposed the idea of the research and engaged in experimental research, data analysis, manuscript preparation and revision. Xueyuan Zhao mainly engaged in raw material preparation, research and analysis. Qiulin Deng mainly engaged in research idea, manuscript editing and revision work. Huiwei Liao, Hongquan Deng and Faqin Dong conducted the research guidance and revisions. Tao Zhang, Lianjun Shi and Jinlong Jiang mainly engaged in revision work. All authors read and approved the final manuscript.

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Correspondence to Qiulin Deng.

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The authors declare that they have no competing interests.

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Responsible Editor: Sami Rtimi

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Highlights

• Successfully prepare novel 3D cross-shaped ZIF-ZnCo.

• Effectively treat mixed wastewater of dyes and metal ions.

• Highly restrain recombination of electron and hole pairs.

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Luo, Q., Huang, X., Deng, Q. et al. Novel 3D cross-shaped Zn/Co bimetallic zeolite imidazolate frameworks for simultaneous removal Cr(VI) and Congo Red. Environ Sci Pollut Res 29, 40041–40052 (2022). https://doi.org/10.1007/s11356-021-18272-x

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  • DOI: https://doi.org/10.1007/s11356-021-18272-x

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