[4] QIAN W. Summary of the utilization status of coal gangue［J］. Mine Engineering, 2016, 4(1): 13-18.
[5] ALMEIDA C M R, GHICA M E, DURES L. An overview on alumina-silica-based aerogels［J］. Advances in Colloid and Interface Science, 2020, 282: 102189.
[6] MALEKI H, DURES L, PORTUGAL A. Synthesis of lightweight polymer-reinforced silica aerogels with improved mechanical and thermal insulation properties for space applications［J］. Microporous and Mesoporous Materials, 2014, 197: 116-129.
[7] OWENS G J, SINGH R K, FOROUTAN F, et al. Sol-gel based materials for biomedical applications［J］. Progress in Materials Science, 2016, 77: 1-79.
[8] GURAV J L, JUNG I K, PARK H H, et al. Silica aerogel: synthesis and applications［J］. Journal of Nanomaterials, 2010, 2010: 409310.
[9] NESTEROV N S, SHALYGIN A S, PAKHARUKOVA V P, et al. Mesoporous aerogel-like Al-Si oxides obtained via supercritical antisolvent precipitation of alumina and silica sols［J］. The Journal of Supercritical Fluids, 2019, 149: 110-119.
[10] JI X F, ZHOU Q, QIU G B, et al. Preparation of monolithic silica-based aerogels with high thermal stability by ambient pressure drying［J］. Ceramics International, 2018, 44(11): 11923-11931.
[11] ZHU J M, CAI H W, DANG N N. Study of synthesis of SiO2 aerogel from coal gangue at an ambient pressure［J］. Advanced Materials Research, 2014, 997: 614-617.
[13] ZHU J M, GUO S H, LI X H. Facile preparation of a SiO2-Al2O3 aerogel using coal gangue as a raw material via an ambient pressure drying method and its application in organic solvent adsorption［J］. RSC Advances, 2015, 5(125): 103656-103661.
[17] LING X, LI B, LI M M, et al. Thermal stability of Al-modified silica aerogels through epoxide-assisted sol-gel route followed by ambient pressure drying［J］. Journal of Sol-Gel Science and Technology, 2018, 87(1): 83-94.
[19] WU X D, SHAO G F, CUI S, et al. Synthesis of a novel Al2O3-SiO2 composite aerogel with high specific surface area at elevated temperatures using inexpensive inorganic salt of aluminum［J］. Ceramics International, 2016, 42(1): 874-882.
