【摘 要】
：
环境友好与绿色氧化技术是当前化学研究与开发的热点.杂多酸(HPA)的酸性和氧化性可以控制在原子和分子水平上,其应用于有机硫化物氧化脱硫反应的研究已见报道[1].磁性纳米材
【机 构】
：
辽宁师范大学化学化工学院功能材料化学研究所,大连,116029北华大学分析测试中心吉林116013中国石油天然气股份有限公司大连石化分公司大连116032
论文部分内容阅读
环境友好与绿色氧化技术是当前化学研究与开发的热点.杂多酸(HPA)的酸性和氧化性可以控制在原子和分子水平上,其应用于有机硫化物氧化脱硫反应的研究已见报道[1].磁性纳米材料作为一种新型功能复合材料具有吸附能力强、表面可修饰和易分离等特点在酸催化和吸附分离等领域应用广泛[2].超顺磁特性的材料作为载体制备固体多功能催化剂引已成为目前催化研究领域的热点.在我们过去研究工作的基础上[3-6],本文制备了铁磁性Fe3O4基质,并引入磷钨酸尿素复合物制备了有机硫化物氧化催化剂,并通过IR、XRD、Raman、UV-vis、31P MAS-NMR和TG等表征手段测定了磁性催化剂的物理化学和热学性质.研究结果表明,在Fe3O4上引入磷钨酸尿素复合物后,后者以Keggin结构存在于载体Fe3O4上,且和载体之间是化学键作用.在以有机硫化物乙硫醇的正己烷溶液的H2O2氧化反应中,磷钨酸尿素复合物的引入提高了磁性Fe3O4乙硫醇的氧化活性,并探讨了尿素在复合催化剂活性改善中的作用.
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