Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (6): 891-901.doi: 10.1007/s40242-023-3182-2

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Vertical 3D Printed Pd/TiO2 Arrays for High Efficiency Photo-assisted Catalytic Water Treatment

FU Chenhao1, LI Dan1, ZHANG Jianwei1, GUO Wei1, YANG He1, ZHAO Bo1, CHEN Zhaomin1, FU Xin2, LIANG Zhiqiang1, and JIANG Lin1   

  1. 1. Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China;
    2. Shanghai Institute of Satellite Engineering, Shanghai 200240, P.R. China
  • Received:2023-08-03 Online:2023-12-01 Published:2023-11-18
  • Contact: LIANG Zhiqiang, JIANG Lin E-mail:zqliang@suda.edu.cn;ljiang@suda.edu.cn
  • Supported by:
    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.

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 forest- like 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.

Key words: 3D printing, TiO2, Hierarchical vertical array, Catalytic water treatment, 4-Nitrophenol