MOF-derived CoN/N-C@SiO2 yolk-shell nanoreactor with dual active sites for highly efficient catalytic advanced oxidation processes

纳米反应器 激进的 催化作用 化学 降级(电信) 化学工程 电子顺磁共振 蛋黄 光化学 有机化学 食品科学 计算机科学 核磁共振 电信 物理 工程类
作者
Shouwei Zhang,Huihui Gao,Xue-Tao Xu,Ruya Cao,Hongcen Yang,Xijin Xu,Jiaxing Li
出处
期刊:Chemical Engineering Journal [Elsevier]
卷期号:381: 122670-122670 被引量:166
标识
DOI:10.1016/j.cej.2019.122670
摘要

Optimizing the structure and composition of the yolk-shell nanoreactors are one of the effective approaches to enhance their performance in heterogeneous catalysis, yet challenging. Here, we report a facile route to synthesize a highly efficient and recyclable yolk-shell CoN/[email protected]2 nanoreactor with dual active sites by the direct nitridation of [email protected]2 precursor. The CoN yolks (∼50–70 nm) as active sites were encapsulated by the hydrophilic SiO2 shells (∼30 nm), and some small dots (∼5–10 nm) was sandwiched between void spaces. In-situ formation of N-doped carbon layer not only served as active sites but also improved electron transfer. The yolk-shell nanoreactors were applied for catalytic tetracycline (TC) degradation by activation of peroxymonosulfate (PMS), and in the optimal case, it degraded >∼95% TC within 30 min in a wide pH value range of 2.02–9.94. The quenching experiments and EPR measurements further revealed that synergistic effect of the radicals and nonradical in PMS activation, O2−, OH, SO4− and 1O2 were involved in TC degradation. The improved catalytic performances could be ascribed to the following two aspects: (1) the hydrophilic SiO2 shell and the microenvironment formed by the yolk-shell structure not only enhance catalytic stability but also provide driving force to improve reaction rate (structural modulation); (2) CoN core and N doped carbon layer as dual active sites can achieve the synergistic effect of radicals and non-radicals in PMS activation (composition modulation). Moreover, possible degradation pathways of TC were proposed through the identification of intermediates using LC–MS/MS techniques. This research highlights the critical role of structure and component optimization in construction of advanced oxidation process systems and provides the possibility of utilizing MOF derivatives in the field of electrocatalysis, lithium battery and supercapacitor etc.
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
大幅提高文件上传限制,最高150M (2024-4-1)

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
刚刚
imshao发布了新的文献求助10
刚刚
刚刚
yatou5651发布了新的文献求助30
1秒前
欢呼傲芙发布了新的文献求助10
2秒前
ggg发布了新的文献求助10
2秒前
半夏完成签到,获得积分10
2秒前
xxy完成签到,获得积分10
2秒前
3秒前
还单身的绝山完成签到 ,获得积分10
4秒前
M20小陈发布了新的文献求助10
4秒前
彩色嚣完成签到 ,获得积分10
4秒前
啦啦啦啦完成签到,获得积分10
4秒前
Jasper应助ybwei2008_163采纳,获得10
5秒前
土豆完成签到,获得积分10
5秒前
more应助谨慎的云朵采纳,获得20
5秒前
想吃榴莲完成签到,获得积分10
5秒前
MingqingFang发布了新的文献求助10
5秒前
晚辰完成签到,获得积分10
6秒前
脑洞疼应助jingjing采纳,获得10
7秒前
大力初珍发布了新的文献求助10
7秒前
晚云烟月应助Fxxkme采纳,获得10
7秒前
风禾完成签到 ,获得积分10
7秒前
孝铮完成签到,获得积分10
8秒前
背后的果汁完成签到,获得积分10
8秒前
8秒前
土豆发布了新的文献求助10
8秒前
9秒前
9秒前
9秒前
9秒前
10秒前
collapsar1应助科研通管家采纳,获得10
10秒前
小墨应助科研通管家采纳,获得10
10秒前
Orange应助科研通管家采纳,获得10
10秒前
小马甲应助科研通管家采纳,获得10
10秒前
所所应助科研通管家采纳,获得10
10秒前
10秒前
小蘑菇应助科研通管家采纳,获得10
10秒前
CipherSage应助科研通管家采纳,获得10
10秒前
高分求助中
Evolution 10000
Sustainability in Tides Chemistry 2800
юрские динозавры восточного забайкалья 800
English Wealden Fossils 700
An Introduction to Geographical and Urban Economics: A Spiky World Book by Charles van Marrewijk, Harry Garretsen, and Steven Brakman 500
Diagnostic immunohistochemistry : theranostic and genomic applications 6th Edition 500
Chen Hansheng: China’s Last Romantic Revolutionary 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 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 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3151350
求助须知:如何正确求助?哪些是违规求助? 2802831
关于积分的说明 7850478
捐赠科研通 2460184
什么是DOI,文献DOI怎么找? 1309602
科研通“疑难数据库(出版商)”最低求助积分说明 628992
版权声明 601760