Study on the Preparation of TiO2-SiO2 Composites from Rice Husk Ash Yu Liang, Xiaoyu Ma, Suping Cui, Zhihong Wang and Yali Wang MATEC Web Conf., 238 (2018) 02005 Published online: 26 November 2018 DOI: 10.1051/matecconf/201823802005