Synthesis of cobalt doped mesoporous silica by using the rice husks as both silicon source and template with its catalytic oxidation of 2-methyl pyridineZhongbiao Zhai, Yingchun Miao, Xie Gang, Shanshan Yang and Jing ChenE3S Web Conf., 189 (2020) 02022DOI: https://doi.org/10.1051/e3sconf/202018902022