CuO_x/C(x=0,1,2)在催化过氧化氢氧化苯甲醛中的活性  

CuO_x/C(x = 0,1,2)catalyst for benzaldehyde oxidation using H_2O_2

作　　者：孙琪[1] 王璐[1] 王彤[1] 李建旋 SUN Qi WANG Lu WANG Tong LI Jianxuan(School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029 ,China Dalian No. 46 Middle School, Dalian 116021, China)

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029 [2]大连市第46中学,辽宁大连116021

出　　处：《辽宁师范大学学报（自然科学版）》2017年第3期332-336,共5页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(21173110)

摘　　要：以D-果糖为炭源,Cu(NO_3)_2为金属前驱体,采用浸渍法结合不同气氛热处理制备了不同价态Cu的CuO_x/C(x=0,1,2)催化剂.实验结果表明:浸渍碳材料后得到的样品经空气250℃热处理5h后Cu以正2价的CuO形式存在;空气热处理后的样品经氢气250℃还原4h后Cu以正1价的Cu_2O形式存在;空气热处理后的样品经氢气300℃还原6h后Cu以0价的Cu单质形式存在.不同价态的铜对于促进H_2O_2分解产生·OH的能力不同.以H_2O_2为氧化剂,乙腈为溶剂,CuO/C催化氧化苯甲醛,表现出较高活性,苯甲酸的产率和选择性分别达到76.2%和99%以上.Difference Cu valence CuO_x/C（x=0,1,2）catalysts are synthesized through hydrothermal and immersion method with different atmosphere heat-treating by using Cu（NO_3）_2 as copper source and D-fructose as carbon source.Results indicated that the CuOx/C mainly includes Cu^（2＋） after heating-treatment for 5h in air atmosphere at 250℃.The CuOx/C mainly includes Cu＋after 250℃ hydrogen reduction 4h.The CuOx/C mainly includes Cu after 300 ℃ hydrogen reduction 6h.The abilities of producing·OH by decomposing H_2O_2 are different over different valece state coppr.Using H_2O_2 as oxidant,acetonitrile as solvent,CuO/C as catalyst in benzaldehyde oxidation reaction,the yield of benzoic acid is 76.2%,the selectivity of benzoic acid is greater than 99%.

关 键 词：CuOx/C 苯甲醛 苯甲酸 过氧化氢 氧化 

分 类 号：O643.322[理学—物理化学]