نتایج جستجو برای: mesoporous sba 15

تعداد نتایج: 507390  

2013
Elena Mihaela Seftel Pegie Cool Anita Lloyd Spetz Anita Lloyd-Spetz Doina Lutic

Sensing materials based on doped mesoporous silica of SBA-15 type were obtained by repeated wet impregnation of the solid with semiconductive oxides (Sn and In) and noble metal (Pt). The mesoporous structure of SBA was preserved during the doping and calcination of the solid, although slight pore size narrowing occurred as shown by the BET adsorption analysis. The solid was deposited by the cas...

2018
Rafael Huirache-Acuña Eric M. Rivera-Muñoz Trino A. Zepeda Rufino Nava Barbara Pawelec

This chapter presents an overview of the literature on the effect of phosphorus modification of ordered mesoporous silica (OMS) such as MCM-41, HMS, SBA-15, and SBA-16 to be used as supports for hydrotreating catalysts based on transition metal sulfides (TMS). The influence of the support modification with variable quantities of phosphorus on the performance for hydrodesulfurization (HDS) and h...

Journal: :Chemical communications 2012
John Mondal Arindam Modak Arghya Dutta Sohini Basu Shambhu Nath Jha Dibyendu Bhattacharyya Asim Bhaumik

Surface functionalization of SBA-15 followed by its reaction with Cu(OAc)(2) has been carried out to develop a new Cu-grafted functionalized mesoporous material, which catalyzes one-pot three component coupling of different aryl halides with thiourea and benzyl bromide in aqueous medium to produce aryl thioethers in very good yields (80-88%).

2016
Fatemeh Rajabi Mohammad Abdollahi Rafael Luque

Supported iron oxide nanoparticles on mesoporous materials (FeNP@SBA-15) have been successfully utilized in the esterification of a variety carboxylic acids including aromatic, aliphatic, and long-chain carboxylic acids under convenient reaction conditions. The supported catalyst could be easily recovered after reaction completion and reused several times without any loss in activity after up t...

Journal: :Bioresources 2023

The stable silica sieve-based HBeta-SBA-15 catalyst-carrier was successfully prepared by a hydrothermal synthesis method, and then Ni2P/HBeta-SBA-15 new hydrodeoxygenation catalyst loaded the equal volume impregnation method. It characterized X-ray diffraction (XRD), N2 adsorption-desorption, scanning electron microscopy (SEM), transmission (TEM), pyrolysis-infrared (Py-IR) methods. results sho...

In this study, highly ordered mesoporous silica material (SBA-15) functionalized with Diethyl 2 - (9 -fluorenyl) malonate as a flourophore is reported. The anchoring of flourophores to the hydroxyl group on SBA-15 surface was done with post synthesis method. The obtained materials were characterized by small and wide angle X-ray diffraction, N2 adsorption–desorption, Fourier transform infrared ...

Journal: :ACS applied energy materials 2021

SBA-CaCl 2 (SCa) composites with high CaCl content were prepared using the non-functionalized and methyl-and carboxyl-functionalized mesoporous SBA-15 supports their thermochemical heat storage (TCHS) performance have been investigated a TG/DSC system coupled humidity generator. This paper presents influence of silica (SBA-15) functionalization on structural-textural properties SCa consequently...

Journal: :Dalton transactions 2015
Yolanda Pérez Isabel del Hierro Lydia Zazo Rafael Fernández-Galán Mariano Fajardo

A family of heterogeneous catalysts has been prepared by employing different strategies: firstly by direct reaction or grafting of titanium, zinc, aluminium and magnesium precursors with dehydrated SBA-15 and secondly by reaction of the metallic derivatives with a hybrid SBA-15 mesoporous material, which possesses a new covalently bonded linker based on an amino alcohol chelate ligand. These ma...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2014
Yong-Fei Li Yuan-Feng Wei Ying Tan Xue-Fei Kong Kai Zhou Zhi-Min Wu Yue-Jin Liu

An inorganic-organic silica material (SBA-15-1), prepared by immobilization of the naphthalimide derivative within the channels of the mesoporous silica material SBA-15, is characterized by several spectroscopic methods. SBA-15-1 can be used as a chemical sensor for detecting and removing Hg(2+) in a heterogeneous system. The fluorescence enhancement of SBA-15-1 was attributed to the formation ...

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