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The influence of multiwalled carbon nanotubes and graphene oxide additives on the catalytic activity of 3d metal catalysts towards 1-phenylethanol oxidation
Journal of Molecular Catalysis A: Chemical Pub Date : 2016-07-07 , DOI: 10.1016/j.molcata.2016.07.015
Ana Paula C. Ribeiro , Emmanuele Fontolan , Elisabete C.B.A. Alegria , Maximilian N. Kopylovich , Roberta Bertani , Armando J.L. Pombeiro

3d metal (Cu, Fe, Co, V) containing composite catalysts for the solvent-free microwave-assisted transformation of 1-phenylethanol to acetophenone with tert-butyl hydroperoxide (TBHP) as oxidant were prepared by ball milling. The influence of multiwalled carbon nanotubes (CNTs) and graphene oxide (GO) additives on the catalytic activity of the catalysts was studied. CNTs or GO were mixed by ball milling with the metal salts (CoCl2), oxides (CuO, Fe2O3, V2O5) or binary systems (Fe2O3-CoCl2, CoCl2-V2O5, CuO-Fe2O3). For CoCl2-based catalytic systems, addition of small amounts (0.1–5%) of CNTs or GO leads to significant improvement in catalytic activity, e.g. 1% of the CNTs additive allows to rise yields from 28 to 77%, under the same catalytic conditions. The CoCl2-5%CNTs composite is the most active among the studied ones with 85% yield and TON of 43 after 1 h.



中文翻译:

多壁碳纳米管和氧化石墨烯添加剂对3d金属催化剂对1-苯基乙醇氧化的催化活性的影响

3 d含金属复合催化剂的1-苯基乙醇,以苯乙酮与无溶剂微波辅助变换(铜,铁,钴,V)丁基过氧化氢(TBHP)作为氧化剂,通过球磨制备。研究了多壁碳纳米管(CNTs)和氧化石墨烯(GO)添加剂对催化剂催化活性的影响。通过球磨将CNT或GO与金属盐​​(CoCl 2),氧化物(CuO,Fe 2 O 3,V 2 O 5)或二元体系(Fe 2 O 3 -CoCl 2, CoCl 2 -V 2 O 5)混合,CuO-Fe 2 O 3)。对于基于CoCl 2的催化系统,添加少量(0.1–5%)的CNTs或GO可以显着提高催化活性,例如,在相同的条件下,CNTs添加剂的1%可使产率从28%提高到77%催化条件。CoCl 2 -5%CNTs复合材料在所研究的复合材料中活性最高,1 h后的收率为85%,TON值为43。

更新日期:2016-07-07
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