Controllable Synthesis of Amino-Functionalized Silica Particles via Co-condensation of Tetraethoxysilane and (3-Aminopropyl)triethoxysilane

三乙氧基硅烷 等电点 冷凝 缩合反应 表面改性 化学 水解 硅烷 粒子(生态学) 粒径 化学工程 降水 硅烷 高分子化学 有机化学 催化作用 物理化学 物理 工程类 热力学 海洋学 气象学 地质学
作者
Chang Liu,Yang Hu,Lin Zhang,Wensheng Yang
出处
期刊:Langmuir [American Chemical Society]
卷期号:40 (47): 25166-25172
标识
DOI:10.1021/acs.langmuir.4c03433
摘要

Amino-functionalized silica has attracted a great deal of interest due to its high surface reactivity and potential for diverse applications across various fields. While the classical co-condensation method is commonly used to synthesize amino-functionalized silica particles, the mechanism of the reaction between (3-aminopropyl)triethoxysilane (APTES) and tetraethoxysilane under different conditions remains unclear, leading to unexpected self-nucleation or cross-linking between silica particles and consequently hindering rational control over the extent of functionalization. To address this issue, we systematically explored the co-condensation growth mechanism of amino-functionalized silica particles in the Stöber method by investigating the effects of APTES concentration and water content on the hydrolysis and condensation of silanes. The experimental results revealed that APTES could decrease the rate of hydrolysis/condensation, while the moderate water content promoted both the rate of hydrolysis/condensation and the overall quality of the silica particles. Consequently, we successfully demonstrated the rational synthesis of amino-functionalized silica particles with diameters ranging from 213 to 670 nm and a nitrogen content of ≤2.8 wt %. The relationship between the APTES concentration and particle properties exhibited a biphasic trend. At low APTES concentrations (≤2.0 mM), the particle size remained stable while the isoelectric point increased rapidly. Further increasing the APTES concentration from 2.0 to 100.0 mM induced a decrease in particle size due to APTES's inhibitory effect on silica growth, with nitrogen content continuing to increase even after the isoelectric point remained unchanged. These silica particles, featuring varying surface amino group densities, were utilized as matrices for loading Au nanoparticles. The resulting functionalized particles exhibited distinctive catalytic ability in the reduction of 4-nitroaniline, demonstrating significant potential for applications across various fields.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
江夏清发布了新的文献求助10
1秒前
新嗨发布了新的文献求助10
2秒前
2秒前
twotwomi发布了新的文献求助10
4秒前
无恙发布了新的文献求助10
5秒前
那小子真帅完成签到,获得积分10
6秒前
Owen应助江夏清采纳,获得10
6秒前
无情的访冬完成签到 ,获得积分10
8秒前
YDX发布了新的文献求助10
8秒前
10秒前
11秒前
wjx关闭了wjx文献求助
11秒前
13秒前
深情安青应助重要的如天采纳,获得10
13秒前
酷波er应助忧虑的绮梅采纳,获得10
14秒前
15秒前
wjx关闭了wjx文献求助
16秒前
Lliu完成签到,获得积分10
16秒前
YOLO发布了新的文献求助30
16秒前
Enckson完成签到,获得积分10
17秒前
热情迎彤发布了新的文献求助10
19秒前
19秒前
19秒前
王小嘻完成签到,获得积分10
20秒前
量子星尘发布了新的文献求助10
21秒前
21秒前
ShiSakura完成签到,获得积分10
21秒前
wjx关闭了wjx文献求助
22秒前
222发布了新的文献求助10
24秒前
25秒前
高大的依秋关注了科研通微信公众号
26秒前
英俊的铭应助zhendezy采纳,获得10
26秒前
从容的戎发布了新的文献求助10
26秒前
27秒前
wjx关闭了wjx文献求助
27秒前
顾矜应助不吃西瓜采纳,获得10
30秒前
桐桐应助ty采纳,获得10
30秒前
zlx发布了新的文献求助10
31秒前
禾晏发布了新的文献求助10
31秒前
32秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975375
求助须知:如何正确求助?哪些是违规求助? 3519718
关于积分的说明 11199471
捐赠科研通 3256067
什么是DOI,文献DOI怎么找? 1798075
邀请新用户注册赠送积分活动 877386
科研通“疑难数据库(出版商)”最低求助积分说明 806305