Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation of halloysite-derived mesoporous silica nanotube with enlarged specific surface area for enhanced dye adsorption
https://orcid.org/0000-0002-5269-2323
AbstractThe enlargement of specific surface area of halloysite-derived nanotubes could benefit the performance and applications of halloysite mineral. In this work, we propose and demonstrate a novel approach to prepare halloysite-derived mesoporous silica nanotubes with substantial specific surface area. The specific surface area up to 608m2/g is achieved from the natural halloysite (Hal) via a simple process of calcination, alkali-treating and acid-etching. The amorphous Si-O-Al network of the calcined Hal is alkali-treated, becoming an amorphous hydroxyl-enriched sodium aluminum silicate phase. The AlO and NaO compositions are selectively acid-etched to in-situ develop mesopores within the residual silica framework, producing the hydroxyl-enriched mesoporous silica nanotubes. The alkali-treatment is crucial to determine the morphology and porosity of the final nanotubes. The optimized mesoporous silica nanotubes behave favorable monolayer adsorption with capacity of 618mg/g for methylene blue, allowing a promising adsorbent in the future.
Graphical abstractThe natural halloysite nanotubes were prepared into mesoporous silica nanotubes with enlarged specific surface area and average pore size, via a novel route of calcination, alkali-treating and acid-etching.
HighlightsHalloysite was prepared into the mesoporous silica nanotubes.The product has a high SBET of 608m2/g and a large average pore size of 6nm.Monolayer adsorption capacity as high as 618mg/g for methylene blue was realized.
Preparation of halloysite-derived mesoporous silica nanotube with enlarged specific surface area for enhanced dye adsorption
https://orcid.org/0000-0002-5269-2323
AbstractThe enlargement of specific surface area of halloysite-derived nanotubes could benefit the performance and applications of halloysite mineral. In this work, we propose and demonstrate a novel approach to prepare halloysite-derived mesoporous silica nanotubes with substantial specific surface area. The specific surface area up to 608m2/g is achieved from the natural halloysite (Hal) via a simple process of calcination, alkali-treating and acid-etching. The amorphous Si-O-Al network of the calcined Hal is alkali-treated, becoming an amorphous hydroxyl-enriched sodium aluminum silicate phase. The AlO and NaO compositions are selectively acid-etched to in-situ develop mesopores within the residual silica framework, producing the hydroxyl-enriched mesoporous silica nanotubes. The alkali-treatment is crucial to determine the morphology and porosity of the final nanotubes. The optimized mesoporous silica nanotubes behave favorable monolayer adsorption with capacity of 618mg/g for methylene blue, allowing a promising adsorbent in the future.
Graphical abstractThe natural halloysite nanotubes were prepared into mesoporous silica nanotubes with enlarged specific surface area and average pore size, via a novel route of calcination, alkali-treating and acid-etching.
HighlightsHalloysite was prepared into the mesoporous silica nanotubes.The product has a high SBET of 608m2/g and a large average pore size of 6nm.Monolayer adsorption capacity as high as 618mg/g for methylene blue was realized.
Preparation of halloysite-derived mesoporous silica nanotube with enlarged specific surface area for enhanced dye adsorption
https://orcid.org/0000-0002-5269-2323
AbstractThe enlargement of specific surface area of halloysite-derived nanotubes could benefit the performance and applications of halloysite mineral. In this work, we propose and demonstrate a novel approach to prepare halloysite-derived mesoporous silica nanotubes with substantial specific surface area. The specific surface area up to 608m2/g is achieved from the natural halloysite (Hal) via a simple process of calcination, alkali-treating and acid-etching. The amorphous Si-O-Al network of the calcined Hal is alkali-treated, becoming an amorphous hydroxyl-enriched sodium aluminum silicate phase. The AlO and NaO compositions are selectively acid-etched to in-situ develop mesopores within the residual silica framework, producing the hydroxyl-enriched mesoporous silica nanotubes. The alkali-treatment is crucial to determine the morphology and porosity of the final nanotubes. The optimized mesoporous silica nanotubes behave favorable monolayer adsorption with capacity of 618mg/g for methylene blue, allowing a promising adsorbent in the future.
Graphical abstractThe natural halloysite nanotubes were prepared into mesoporous silica nanotubes with enlarged specific surface area and average pore size, via a novel route of calcination, alkali-treating and acid-etching.
HighlightsHalloysite was prepared into the mesoporous silica nanotubes.The product has a high SBET of 608m2/g and a large average pore size of 6nm.Monolayer adsorption capacity as high as 618mg/g for methylene blue was realized.
Preparation of halloysite-derived mesoporous silica nanotube with enlarged specific surface area for enhanced dye adsorption
Shu, Zhu (Autor:in) / Chen, Yun (Autor:in) / Zhou, Jun (Autor:in) / Li, Tiantian (Autor:in) / Sheng, Zimo (Autor:in) / Tao, Chunwei (Autor:in) / Wang, Yanxin (Autor:in)
Applied Clay Science ; 132-133 ; 114-121
24.05.2016
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017