Gram-scale synthesis of ultra-fine Cu 2 O for highly efficient ozone decomposition

Nowadays, it is necessary and challenging to prepare Cu O in a large scale for various applications such as catalysis due to its excellent properties. Here, gram-scale Cu O with nm size is successfully prepared using a simple liquid-phase reduction method at 25 °C. The amount of NaOH is found to be...

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Veröffentlicht in:RSC advances 2020-01, Vol.10 (9), p.5212-5219
Hauptverfasser: Gong, Shuyan, Wang, Anqi, Zhang, Jilai, Guan, Jian, Han, Ning, Chen, Yunfa
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container_issue 9
container_start_page 5212
container_title RSC advances
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creator Gong, Shuyan
Wang, Anqi
Zhang, Jilai
Guan, Jian
Han, Ning
Chen, Yunfa
description Nowadays, it is necessary and challenging to prepare Cu O in a large scale for various applications such as catalysis due to its excellent properties. Here, gram-scale Cu O with nm size is successfully prepared using a simple liquid-phase reduction method at 25 °C. The amount of NaOH is found to be the key factor to determine the particle size of Cu O by modifying the complexation and reduction reactions. The obtained ultra-fine Cu O exhibits high performance of >95% efficiency for removing high-concentration (3000 ppm) ozone at 25 °C and even at a high relative humidity (RH) of 90% for more than 8 h. Furthermore, the Cu O nanoparticles are coated onto an aluminium honeycomb substrate to form a monolithic catalyst, which shows high ozone removal efficiency of >99% in dry air and >97% in 90% RH for >10 h at a space velocity of 8000 h . The high performance could be attributed to the enhanced release of the ozone decomposition intermediate by the small size of Cu O, as verified by O temperature-programmed desorption and X-ray photoelectron spectroscopy. All these results show the industrial promise of the large scale synthesis of ultrafine Cu O applicable for high-performance ozone removal.
doi_str_mv 10.1039/C9RA09873A
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title Gram-scale synthesis of ultra-fine Cu 2 O for highly efficient ozone decomposition
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