Advances in Microporous and Mesoporous Materials最新文献

Polymer Functionalization of Mesoporous Silica Nanoparticles Using Controlled Radical Polymerization Techniques 利用可控自由基聚合技术实现介孔二氧化硅纳米颗粒聚合物功能化

Advances in Microporous and Mesoporous Materials Pub Date : 2020-05-08 DOI: 10.5772/intechopen.92323

L. Nebhani, Smrutirekha Mishra, T. Joshi

{"title":"Polymer Functionalization of Mesoporous Silica Nanoparticles Using Controlled Radical Polymerization Techniques","authors":"L. Nebhani, Smrutirekha Mishra, T. Joshi","doi":"10.5772/intechopen.92323","DOIUrl":"https://doi.org/10.5772/intechopen.92323","url":null,"abstract":"Mesoporous silica nanoparticles (MSNs) are widely studied and are an interesting material due to its application in wide range of areas, for example, in drug delivery, catalysis, in sensors, and in adsorption and separation. Specifically, MSNs contain high surface area and large pore volume, providing high drug loading capacity, tunable pore size, surface chemistry for accommodation of a variety of guest molecules, and versatile functionalization on the external and internal surface for a broad spectrum of applications. Many new strategies have been developed for the synthesis and functionalization of mesoporous silica-based materials. The functionalization of MSNs is highly important as it leads to the development of new chemical and physical properties. Thus, preparation of these organic/inorganic hybrid structures requires facile and controlled techniques to generate enhanced properties. The grafting of polymers using controlled radical polymerization (CRP) techniques has turned out to be the best suited method to synthesize these well-defined organic-inorganic hybrid MSNs. Most common polymerization techniques are atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer (RAFT) polymerization, and nitroxide mediated polymerization (NMP). This chapter will be highlighting the state-of-the-art techniques for the synthesis of variety of MSNs, its functionalization using CRP techniques, and application of polymer functionalized MSNs.","PeriodicalId":170017,"journal":{"name":"Advances in Microporous and Mesoporous Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130990087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Melting and Dissolving Fly Ash by NaOH for the Removal of Iron, Calcium, and Other Impurities 用氢氧化钠熔融和溶解粉煤灰去除铁、钙和其他杂质

Advances in Microporous and Mesoporous Materials Pub Date : 2020-03-26 DOI: 10.5772/intechopen.91704

Wang Minghua, Hui Zhao, G. Tursun, Yang Jianwang, Liu Long

引用次数: 1

Sulfided NiMo/Clinoptilolite Catalysts for Selective Sulfur Removal from Naphtha Stream without Olefin Hydrogenation 硫化镍/斜沸石催化剂在石脑油不加氢选择性脱硫中的应用

Advances in Microporous and Mesoporous Materials Pub Date : 2020-03-03 DOI: 10.5772/intechopen.91375

Cristina Farías Rosales, R. Guil-López, M. Faraldos, Rafael Maya Yescas, Trino Armando Zepeda, B. Pawelec, R. Huirache-Acuña

{"title":"Sulfided NiMo/Clinoptilolite Catalysts for Selective Sulfur Removal from Naphtha Stream without Olefin Hydrogenation","authors":"Cristina Farías Rosales, R. Guil-López, M. Faraldos, Rafael Maya Yescas, Trino Armando Zepeda, B. Pawelec, R. Huirache-Acuña","doi":"10.5772/intechopen.91375","DOIUrl":"https://doi.org/10.5772/intechopen.91375","url":null,"abstract":"The natural clinoptilolite zeolite has been modified by acid leaching with HNO3 in order to obtain economic material for supporting NiMoS hydrotreating catalysts. The most optimized zeolite material was obtained by leaching with HNO3 at 80°C during 24 h. The bimetallic NiMo catalysts prepared by wet impregnation of a zeolite support, followed by calcination and sulfidation, were characterized by several physico-chemical techniques and tested in the hydrodesulfurization (HDS) of 3-methyl-thiophene (3-MT) model feed at atmospheric H2 pressure and T = 280°C. For all catalysts, the 3-MT transformation mainly occurs via direct desulfurization reaction route being diminished the catalyst hydrogenation function. This was linked with the formation of highly stacked layers of MoS2 particles having a low amount of “brim sites,” as demonstrated by HRTEM. The cause of the best performance of Ni-Mo(H)/Z-1 sulfide catalyst in the HDS of 3-MT can be the presence of K impurities on the support surface which forces the formation of highly stacked layers of MoS2 particles.","PeriodicalId":170017,"journal":{"name":"Advances in Microporous and Mesoporous Materials","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127266609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Functionalized MCM-48 as Carrier for In Vitro Controlled Release of an Active Biomolecule, L-Arginine 功能化MCM-48作为活性生物分子l -精氨酸体外控释的载体

Advances in Microporous and Mesoporous Materials Pub Date : 2019-12-04 DOI: 10.5772/intechopen.90175

Anjali U. Patel, P. Solanki

引用次数: 1