Regulable surface hydroxyl group content in disperse ultrafine amorphous SiO2 nanoparticles

IF 2.1 3区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Glass Science Pub Date : 2024-01-11 DOI:10.1111/ijag.16655

Desheng Yang, Tiecheng Cai, Hongbing Yang, Wei Wei, Qian Guo, Jialing Liu, Xiaojuan Yan, Yuanyuan Li, Jie Zhang, Jiangong Li

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Abstract

Amorphous silica (SiO₂) nanoparticles (NPs) can be applied in environmental pollutant remediation, element removal, and water purification. The content of surface silanol groups in amorphous SiO₂ NPs affects the characteristics of SiO₂ NPs. However, the regulation of surface silanol group content in amorphous SiO₂ NPs below 10 nm remains a challenge. Herein, tunable surface silanol group content was achieved in disperse ultrafine amorphous SiO₂ NPs by controlling calcination and rehydroxylation. The surface silanol group content in amorphous SiO₂ NPs is low (10 nm) and can be tuned from 0% to 2.5%. The amount of naphthalene adsorbed by the SiO₂ NPs increases with increasing surface silanol group content. The surface silanol group content in SiO₂ NPs can be an effective means to tune their adsorption performance and applications.

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分散超细无定形二氧化硅纳米颗粒中可调节的表面羟基含量

无定形二氧化硅（SiO2）纳米粒子（NPs）可用于环境污染物修复、元素去除和水净化。无定形二氧化硅（SiO2）纳米粒子中表面硅烷醇基的含量会影响二氧化硅纳米粒子的特性。然而，如何调节 10 纳米以下无定形 SiO2 NPs 的表面硅烷醇基团含量仍是一个难题。本文通过控制煅烧和再羟化，实现了分散超细无定形SiO2 NPs表面硅醇基含量的可调。无定形 SiO2 NPs 的表面硅醇基含量较低（10 nm），可在 0% 至 2.5% 之间调节。SiO2 NPs 吸附的萘量随着表面硅醇基含量的增加而增加。SiO2 NPs 的表面硅烷醇基团含量是调节其吸附性能和应用的有效手段。

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来源期刊

International Journal of Applied Glass Science MATERIALS SCIENCE, CERAMICS-

CiteScore

4.50

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Applied Glass Science (IJAGS) endeavors to be an indispensable source of information dealing with the application of glass science and engineering across the entire materials spectrum. Through the solicitation, editing, and publishing of cutting-edge peer-reviewed papers, IJAGS will be a highly respected and enduring chronicle of major advances in applied glass science throughout this century. It will be of critical value to the work of scientists, engineers, educators, students, and organizations involved in the research, manufacture and utilization of the material glass. Guided by an International Advisory Board, IJAGS will focus on topical issue themes that broadly encompass the advanced description, application, modeling, manufacture, and experimental investigation of glass.