修改了Sn和Mo的硫化碳:作为水和DMSO中的果糖转化催化剂的特性和评估
Felyppe Markus Ribeiro Sobral Altino1, Wander Dos Santos Sá1, Jailma Barros Dos Santos1
1Group of Catalysis and Chemical Reactivity (GCAR), Institute of Chemistry and Biotechnology, Federal University of Alagoas, Maceió, AL 57072-970, Brazil.
ACS omega
|June 16, 2025
概括
用锡 (Sn) 和 (Mo) 修改的硫化碳材料对果糖转化具有增强的催化活性. 显著提高了转换率,表明酸性位是提高效率的关键.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
背景情况:
- 作为生物柴油副产品的甘油可以转化为有价值的化学物质.
- 开发高效的异质催化剂对于可持续的化学生产至关重要.
研究的目的:
- 用锡 (Sn) 和 (Mo) 修改的硫化碳基材料进行合成和表征.
- 评估这些材料的催化性能,以将果糖转化为5-氧甲基 (5-HMF).
- 调查酸性质和纹理特征对催化效率的作用.
主要方法:
- 来自甘油的碳材料的硫化.
- 用Sn和Mo金属物种进行修改.
- 使用ICP-OES,XRD和FTIR进行表征.
- 在水和DMSO介质中进行果糖转化催化试验.
主要成果:
- Sn和Mo的结合引入了易斯酸度,而Brønsted酸度则通过FTIR得到证实.
- Sn的修改对汇率的影响最小.
- 加入Mo显著增强了果糖的转化,CSn3Mo3在6小时后实现了92.1%的转化.
- 易斯酸位点对于形成逆醇路径中间体至关重要.
结论:
- 酸性位点的性质,特别是Mo的易斯酸度,对于果糖转化效率比纹理性质更为关键.
- 用Mo修改的硫化碳材料显示出作为生物质转换的异质催化剂的前景.
- 在重复使用试验中,催化剂失活与减少布伦斯特德酸位和人体形成有关.
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