Preparation of Al2O3 hollow microsphere via calcining carbon template and its adsorption application

Carbon microsphere was synthesized from glucose via hydrothermal method, and then alumina hollow microsphere was prepared using carbon template. At reaction time of 6 h, the carbon sphere displayed uniform diameter of 800 nm. After removal of carbon core during calcination, it obtained 600 nm of γ-Al2O3 hollow sphere with shell thickness of 80 nm and surface area of 186 m2/g. For adsorption of methylene blue, material exhibited adsorption capacity of 26.5 ± 1.2 mg/g, fitting well with Langmuir isotherm. It is demonstrated that calcining carbon template was an effective and facile approach to obtain hollow sphere material.