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198 results on '"Wu, Ronglan"'

18. Enhanced Catalytic Performance of Palladium‐Based Catalysts Modified With the Dibenzofuran Ligand for Acetylene Hydrochlorination.

Author

Ali, Shahid, Wang, Lu, Yan, Haijun, Yang, Chao, Wang, Jide, Sun, Hui, Li, Xiaofei, Wu, Ronglan, and Liang, Changhai

Abstract

A new palladium‐based catalyst system modified with dibenzofuran (DBF) was developed for acetylene hydrochlorination. The optimal Pd‐DBF/SAC catalyst with the 0.5 wt% Pd loading and the 15 wt% DBF loading exhibits an elevated performance of 99.9% acetylene conversion and 99.9% vinyl chloride selectivity for more than 400 h. Characterization analysis and density functional theory (DFT) simulations revealed that the presence of oxygen‐containing DBF species of the Pd‐DBF/SAC catalyst prevents the reduction and loss of Pd species, inhibits the carbon deposition and enhances the HCl adsorbability, resulting in superior catalytic activity and stability for acetylene hydrochlorination. [ABSTRACT FROM AUTHOR]

Published
2024
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48. Enhanced gas sensing property of Co3O4matrix nanocomposites with halloysite nanotubes toward triethylamine

Author

Fan, Jie, Yang, Chao, Zhao, Xueying, Li, Dan, Xiao, Feng, Wu, Ronglan, and Wang, Lu

Abstract

Despite their high surface reactivity, the gas sensor based on Co3O4nanoparticles frequently suffers from a low response to volatile organic compounds (VOCs) due to high-temperature sintering and inefficient resistance modulation. Herein, halloysite nanotubes (HNTs) were incorporated as the additive into the Co3O4nanoparticle matrix to enhance the sensing property toward VOCs in terms of gas response (Rg/Ra) and operation stability. Co3O4nanoparticles intimately attached on HNTs were achieved by a facile deposition-precipitation method followed by calcination. The best-performing Co3O4/0.3HNTs-based sensor had a high gas response of 22.9 to 50 ppm triethylamine at 240 °C, which was 4.9 times than that of Co3O4alone. The enhanced sensitivity could be attributed to the HNT incorporation that facilitated effective resistance modulation, surface property tuning, as well as surface defect formation. These results bring new insight into an enhancement of gas sensing property of a p-type metal oxide with insensitive materials. They also provide a potential to expand the application of aluminosilicate clays to gas sensors.

Published
2023
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