4.7 Article

Cellulose template designed porous ZnO based catalysts with different valence copper for solar photocatalytic CO2 conversion

Journal

INDUSTRIAL CROPS AND PRODUCTS
Volume 186, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.indcrop.2022.115223

Keywords

Cellulose templates; CuO-ZnO; Cu-ZnO; Photocatalysis; CO2 conversion

Funding

  1. National Natural Science Foundation of China [31870565]
  2. fellowship of China Postdoctoral Science Foundation [2020M671505]
  3. University Science Research Project of Jiangsu Province [20KJB220011]
  4. Graduate Research and Innovation Projects of Jiangsu Province [KYCX21_0882]

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Designing a green method to enhance the utilization of photocatalysts on solar energy is significant. The porous ZnO-based catalysts with different valence copper (CuO-ZnOCel-T and Cu-ZnOCel-T) showed excellent photocatalytic activities. The reduction of CuO-ZnOCel-T to Cu-ZnOCel-T using wheat straw significantly improved the CO production rate, indicating the potential of biomass materials in tailoring catalyst performance.
Designing a green method to enhance the utilization of photocatalysts on solar energy was of great significance to alleviate energy problems. The porous ZnO-based catalysts with different valence copper (CuO-ZnOCel-T and Cu-ZnOCel-T) were successfully obtained by using cellulose fibers as templates, which possessed three-dimensional structures and excellent photocatalytic activities. The dispersibility of CuO-ZnOCel-T nanoparticle was influenced by surface groups of cellulose template, the more active sites of composite catalyst were exposed than CuO-ZnO catalysts with carbon fiber as the template and CuO-ZnO powders without any template. Moreover, to explore the effects of different valence states of Cu on the photocatalytic activity of ZnO nano-particles, wheat straw was used to reduce CuO-ZnOCel-T to Cu-ZnOCel-T by using pyrolysis reduction treatment of wheat straw. The CO production rate of Cu-ZnOCel-T (30.17 mu mol*g(-1)h(-1)) was significantly higher than CuO-ZnOCel-T (8.61 mu mol*g(-1)h(-1)) based on the same catalyst morphologies, indicating that the surface plasmon resonance (SPR) effect of Cu was more favorable for improving catalytic activities of ZnO than the structure effect of CuO-ZnOCel-T heterojunction. This work proposed an exciting idea for using biomass materials to tailor the photocatalytic performance of catalysts and reduce copper ions in a cleaner method.

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