Abstract
Catalytic degradation of organic contaminants is at the frontier of water treatment due to its selectivity, energy savings, and ability to convert harmful contaminants into harmless or even valuable chemical products for recycling. However, achieving sufficiently high performance in the catalytic removal of organic contaminants for practical application is still extremely challenging. Herein, we report a Pd-decorated TiO2 (Pd/TiO2) hierarchical vertical array for fast and efficient catalytic water treatment. Such a forestlike Pd/TiO2 vertical array demonstrates the following distinct advantages over conventional planar or bulk catalytic systems: 1) abundant anchoring sites for nanocrystals loading; 2) high sunlight absorption; 3) efficient mass transfer channels for the reactants and products. As a proof of concept, the Pd/TiO2 array demonstrated rapid and efficient photo-assisted catalytic reduction of high concentrations of 4-nitrophenol wastewater (2 g/L, ca. 14.38 mmol/L) and its feasibility for continuous flow wastewater treatment. The turnover frequency (TOF) value of the Pd/TiO2 array was up to 8.00 min−1, which was approximately 4.2 times that of planar Pd/TiO2 film with the same area (1.91 min−1). Our strategy of incorporating nanocatalysts with a hierarchical vertical array provides a promising approach to boosting the catalytic performance of catalysts for different chemical reactions.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos.22072104 and 21822202), the “Nano Frontier” Key Special Project of the National Key R&D Program of China (Nos.2022YFA1200129, 2022YFA1205303 and 2022YFA1205300), the Project of the Suzhou Key Laboratory of Surface and Interface of Intelligent Matter, China (No.SZS2022011), the Project Funded by CIC and the 111 Project.
We also thank the Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, and the Collaborative Innovation Center of Suzhou Nano Science and Technology.
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JIANG Lin is a youth executive editorial board member for Chemical Research in Chinese Universities and was not involved in the editorial review or the decision to publish this article. The authors declare no conflicts of interest.
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Fu, C., Li, D., Zhang, J. et al. Vertical 3D Printed Pd/TiO2 Arrays for High Efficiency Photo-assisted Catalytic Water Treatment. Chem. Res. Chin. Univ. 39, 891–901 (2023). https://doi.org/10.1007/s40242-023-3182-2
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DOI: https://doi.org/10.1007/s40242-023-3182-2