Silica-titania mesoporous silicas of MCM-41 type as effective catalysts and photocatalysts for selective oxidation of diphenyl sulfide by H₂O₂

IF 3.8 4区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY

Green Processing and Synthesis Pub Date : 2023-01-01 DOI:10.1515/gps-2023-0052

Wiktoria Dubiel, Andrzej Kowalczyk, Aleksandra Jankowska, Marek Michalik, Włodzimierz Mozgawa, Marcin Kobielusz, Wojciech Macyk, Lucjan Chmielarz

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引用次数: 0

Abstract

Abstract Spherical Ti-MCM-41, synthetized by co-condensation method, presented very promising activity in catalytic and photocatalytic oxidation of diphenyl sulfide with H 2 O 2 to obtain diphenyl sulfoxide and diphenyl sulfone. Mesoporous silica materials with various titanium content were analyzed with respect to chemical composition (inductively coupled plasma optical emission spectrometry), structure properties (X-ray diffraction), textural properties (low-temperature N 2 adsorption–desorption), morphology (scanning electron microscopy), forms and aggregation introduced titanium species (diffuse reflectance spectroscopy, Raman spectroscopy), and surface acidity (NH 3 -TPD). Titanium introduced in the samples was present mainly in the form of highly dispersed species, presenting catalytic and photocatalytic activities in diphenyl sulfide oxidation with H 2 O 2 . Efficiency of the reaction increased with an increase in titanium loading in the samples and was significantly intensified under UV irradiation. The role of various Ti species in diphenyl sulfide oxidation was presented and discussed.

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MCM-41型二氧化硅-二氧化钛介孔二氧化硅作为H2O2选择性氧化二苯基硫化物的有效催化剂和光催化剂

摘要采用共缩合法合成球形Ti-MCM-41，在h2o2催化和光催化氧化二苯基硫化物得到二苯基亚砜和二苯基砜方面表现出良好的活性。分析了不同钛含量的介孔二氧化硅材料的化学成分(电感耦合等离子体发射光谱法)、结构性能(x射线衍射法)、结构性能(低温n2吸附-解吸)、形貌(扫描电镜)、引入钛的形态和聚集(漫反射光谱、拉曼光谱)以及表面酸度(nh3 -TPD)。样品中引入的钛主要以高度分散的形态存在，在二苯基硫化物与h2o2氧化反应中表现出催化和光催化活性。反应效率随样品中钛含量的增加而增加，在紫外照射下反应效率显著增强。介绍并讨论了不同钛种类在二苯硫醚氧化中的作用。

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来源期刊

Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

6.70

自引率

9.30%

发文量

审稿时长

7 weeks

期刊介绍： Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.

Silica-titania mesoporous silicas of MCM-41 type as effective catalysts and photocatalysts for selective oxidation of diphenyl sulfide by H2O2

Abstract

Silica-titania mesoporous silicas of MCM-41 type as effective catalysts and photocatalysts for selective oxidation of diphenyl sulfide by H₂O₂