利用异相二氧化钛光催化技术将糠醛选择性转化为糠醇

IF 3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Joana C. Lopes, Dr. Maria J. Sampaio, Prof. Cláudia G. Silva, Prof. Joaquim L. Faria
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引用次数: 0

摘要

在温和的温度和压力条件下,通过半导体光催化途径从糠醛转化中选择性合成糠醇是将生物质转化为高附加值产品的一种有前途的解决方案。二氧化钛(TiO2)光催化剂的制备采用了简单的溶胶-凝胶法,然后在 500 - 1000 ºC 的温度下进行煅烧处理,从而得到了具有独特物理化学特性的材料。在紫外-LED 的照射下,考察了 TiO2 样品从糠醛中选择性生产糠醇的光催化效率。评估了乙醇、甲醇、2-丙醇和乙腈等各种有机溶剂的影响,以优化糠醇生产的选择性。在 600 ºC 的空气环境下煅烧的 TiO2 样品(TiO2-600)将糠醛转化为糠醇的转化率最高,以乙醇为溶剂反应 30 分钟后,糠醛的产率达到 85%,选择性达到 100%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Selective Conversion of Furfural to Furfuryl Alcohol by Heterogeneous TiO2 Photocatalysis

Selective Conversion of Furfural to Furfuryl Alcohol by Heterogeneous TiO2 Photocatalysis

Selective synthesis of furfuryl alcohol from furfural conversion via semiconductor photocatalytic route has appeared as a promising solution for transforming biomass into high-value-added products under mild temperature and pressure conditions. Titanium dioxide (TiO2) photocatalysts were prepared by a simple sol-gel method followed by a calcination treatment ranging from 500–1000 °C, resulting in materials with distinct physicochemical properties. The photocatalytic efficiency of the TiO2 samples was examined in the selective production of furfuryl alcohol from furfural under UV-LED irradiation. The influence of various organic solvents, including ethanol, methanol, 2-propanol, and acetonitrile, was evaluated to optimise the selectivity towards furfuryl alcohol production. Photocatalysts with larger anatase to rutile ratio and increased density of oxygen vacancies (defects) exhibited superior performance for furfuryl alcohol production. The presence of these defects on the catalyst surface leads to a significant enhancement in the photocatalytic efficiency by acting as crucial active sites. Among the TiO2 samples, the highest conversion of furfural into furfuryl alcohol was observed with the TiO2 sample calcined under an air atmosphere at 600 °C (TiO2-600), achieving 85 % yield and 100 % selectivity for furfural after 30 min reaction using ethanol as solvent.

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来源期刊
ChemPhotoChem
ChemPhotoChem Chemistry-Physical and Theoretical Chemistry
CiteScore
5.80
自引率
5.40%
发文量
165
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