Cleaner continuous flow production of mesoporous calcium-magnesium silicate as a potential biomaterial


Cleaner continuous flow production of mesoporous calcium-magnesium silicate as a potential biomaterial

Chun Hui Zhou*, Shu Ting Xia, Sridhar Komarneni, Freeman Bwalya Kabwe, Gui Chen Jin & Mao Quan Chu
Journal of Porous Materials. 2020, 27, 503–513.

Dolomite is an abundant, naturally occurring carbonate mineral, but the conventional processes of converting dolomite to new materials are time-consuming and energy-intensive. In addition, products from dolomite such as magnesium oxide, magnesium carbonate, magnesium hydroxide, which are used as adsorbents and additives, are mostly low value-added. Here, we demonstrated the conversion of dolomite to a mesoporous calcium-magnesium silicate (m-CMS) using a green and efficient continuous-flow synthesis method. The samples were characterized using powder X-ray diffraction, Fourier transformed infrared spectroscopy, N2 adsorption/desorption isotherms, thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy. The material possessed mesoporosity and exhibited high a specific surface area of 629 m2/g and a pore volume of 0.66 cm3/g. The maximum water absorptivity of the sample was 52.6%. After the m-CMS immersing in Tris–HCl solution for 56 days, the weight loss ratio reached 30 wt%, indicating its good potential biodegradability. Hydroxyapatite was formed on the surfaces after the m-CMS was immersed in simulated body fluids. The m-CSM provided nucleation sites, and subsequently supplied Ca2+ for hydroxyapatite crystal growth, indicating that the material has potential bone conduction capability. This work suggests that m-CMS can be synthesized from dolomite and tetraethyl orthosilicate through a quick continuous process, and that the m-CMS could be used as a biomaterial.

Author information

Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
Chun Hui Zhou
, Shu Ting Xia
, Freeman Bwalya Kabwe
 & Gui Chen Jin
Institute of Life Science and Technology, Tongji University, Shanghai, 200092, China
Mao Quan Chu
Department of Ecosystem Science and Management and Materials Research Institute, 204 Energy and the Environment Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA
Sridhar Komarneni
Qing Yang Institute for Industrial Minerals, You Hua, Qing Yang, Chi Zhou, 242804, China
Chun Hui Zhou
Corresponding author
Correspondence to Chun Hui Zhou.




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