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Mesoporous silica derived from kaolin: Specific surface area enlargement via a new zeolite-involved template-free strategy
https://orcid.org/0000-0002-5269-2323
Abstract A novel zeolite-involved template-free strategy is proposed and demonstrated to process natural kaolin into mesoporous silica with enlarged specific surface area (SBET). Kaolin was calcined and alkali-treated into aluminosilica zeolite, and then transformed into amorphous mesoporous silica with SBET of 751.5m2/g and pore size of ~4.0nm at the maximum probability in a subsequent acid-treatment. The alkali-treatment and the formation of zeolite intermediate were found to be the key for the SBET enlargement. The mechanisms were studied by XRD, XRF, SEM, TEM and N2 adsorption/desorption. The mesoporous silica shows favorable adsorption ability towards methylene blue with a monolayer adsorption capacity of up to 756.5mg/g, indicating its promising potential in adsorption application.
Graphical abstract Display Omitted
Highlights A template-free process to prepare mesoporous silica (MS) from kaolin was designed. The process simply consists of calcination, alkali- and acid-treatment. MS has an improved SBET of 751.5m2/g and DBJH of ~4nm. MS has a high monolayer adsorption capacity of 756.5mg/g towards methylene blue.
Mesoporous silica derived from kaolin: Specific surface area enlargement via a new zeolite-involved template-free strategy
https://orcid.org/0000-0002-5269-2323
Abstract A novel zeolite-involved template-free strategy is proposed and demonstrated to process natural kaolin into mesoporous silica with enlarged specific surface area (SBET). Kaolin was calcined and alkali-treated into aluminosilica zeolite, and then transformed into amorphous mesoporous silica with SBET of 751.5m2/g and pore size of ~4.0nm at the maximum probability in a subsequent acid-treatment. The alkali-treatment and the formation of zeolite intermediate were found to be the key for the SBET enlargement. The mechanisms were studied by XRD, XRF, SEM, TEM and N2 adsorption/desorption. The mesoporous silica shows favorable adsorption ability towards methylene blue with a monolayer adsorption capacity of up to 756.5mg/g, indicating its promising potential in adsorption application.
Graphical abstract Display Omitted
Highlights A template-free process to prepare mesoporous silica (MS) from kaolin was designed. The process simply consists of calcination, alkali- and acid-treatment. MS has an improved SBET of 751.5m2/g and DBJH of ~4nm. MS has a high monolayer adsorption capacity of 756.5mg/g towards methylene blue.
Mesoporous silica derived from kaolin: Specific surface area enlargement via a new zeolite-involved template-free strategy
https://orcid.org/0000-0002-5269-2323
Abstract A novel zeolite-involved template-free strategy is proposed and demonstrated to process natural kaolin into mesoporous silica with enlarged specific surface area (SBET). Kaolin was calcined and alkali-treated into aluminosilica zeolite, and then transformed into amorphous mesoporous silica with SBET of 751.5m2/g and pore size of ~4.0nm at the maximum probability in a subsequent acid-treatment. The alkali-treatment and the formation of zeolite intermediate were found to be the key for the SBET enlargement. The mechanisms were studied by XRD, XRF, SEM, TEM and N2 adsorption/desorption. The mesoporous silica shows favorable adsorption ability towards methylene blue with a monolayer adsorption capacity of up to 756.5mg/g, indicating its promising potential in adsorption application.
Graphical abstract Display Omitted
Highlights A template-free process to prepare mesoporous silica (MS) from kaolin was designed. The process simply consists of calcination, alkali- and acid-treatment. MS has an improved SBET of 751.5m2/g and DBJH of ~4nm. MS has a high monolayer adsorption capacity of 756.5mg/g towards methylene blue.
Mesoporous silica derived from kaolin: Specific surface area enlargement via a new zeolite-involved template-free strategy
Shu, Zhu (author) / Li, Tiantian (author) / Zhou, Jun (author) / Chen, Yun (author) / Sheng, Zimo (author) / Wang, Yanxin (author) / Yuan, Ximing (author)
Applied Clay Science ; 123 ; 76-82
2016-01-12
7 pages
Article (Journal)
Electronic Resource
English
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