Study on oxidation of styrene with molecular oxygen catalyzed by MoO2/Ag on polyionic liquid

doi:10.11949/0438-1157.20200810

Abstract

Abstract:

The supported catalyst PVAD/MoO₂/Ag was prepared by ion exchange and hydrothermal reduction using amino-functionalized polyionic liquid as the carrier, and its performance in catalyzing the oxidation of styrene was investigated. The prepared catalysts were characterized by FT-IR, TG, XRD, SEM and BET. The results showed that PVAD/MoO₂/Ag_4% showed the best catalytic activity. Under the conditions of acetonitrile as solvent, temperature of 90℃ and oxygen pressure of 0.8 MPa for 8 h, the conversion rate of styrene was 49.9%, and the selectivity of benzaldehyde reached 74.4%. Moreover, the activity did not decrease significantly after reused 5 times, showing good reusability.

Key words: polyionic liquid, molecular oxygen, oxidation, styrene, benzaldehyde

摘要：

以氨基功能化的聚离子液体为载体，通过离子交换和水热还原，制备出负载型催化剂PVAD/MoO₂/Ag，考察了其催化苯乙烯氧化的性能。采用FT-IR、TG、XRD、SEM和BET对其所制备的催化剂进行表征。苯乙烯氧化性能研究结果表明，PVAD/MoO₂/Ag_4%表现出最佳的催化活性，在乙腈为溶剂，温度为90℃，氧气压力为0.8 MPa的条件下，反应8 h，苯乙烯的转化率为49.9%，苯甲醛的选择性达到74.4%。并且催化剂重复使用5次，活性没有明显下降，表现出良好的重复利用性。

关键词: 聚离子液体, 分子氧, 氧化, 苯乙烯, 苯甲醛

CLC Number:

TQ 028.8

Yuefeng WU,Yongfang QU,Dahuan LI,Miaojun SU,Yong LIU. Study on oxidation of styrene with molecular oxygen catalyzed by MoO₂/Ag on polyionic liquid[J]. CIESC Journal, 2020, 71(11): 4990-4998.

吴岳峰,曲永芳,李大欢,苏苗军,刘勇. 聚离子液体载MoO₂/Ag催化分子氧氧化苯乙烯的研究[J]. 化工学报, 2020, 71(11): 4990-4998.

Figures/Tables 15

References 47

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催化剂	S_BET /(m²/g)	v_p/(cm³/g)	d_p/nm
PVAD	86.6	0.13	9.43
PVAD/MoO₂/Ag_4%	141.8	0.21	8.79

催化剂	S_BET /(m²/g)	v_p/(cm³/g)	d_p/nm
PVAD	86.6	0.13	9.43
PVAD/MoO₂/Ag_4%	141.8	0.21	8.79

溶剂	转化率/%	选择性/%
溶剂	转化率/%	苯甲醛	苯乙烯氧化物
MeCN	34.0	84.4	3.2
DMF	23.1	12.2	10.8
DCM	4.19	100	0
PhMe	1.4	100	0
EtOH	12.5	78.8	5.4

溶剂	转化率/%	选择性/%
溶剂	转化率/%	苯甲醛	苯乙烯氧化物
MeCN	34.0	84.4	3.2
DMF	23.1	12.2	10.8
DCM	4.19	100	0
PhMe	1.4	100	0
EtOH	12.5	78.8	5.4

催化剂	转化率/%	选择性/%
催化剂	转化率/%	苯甲醛	苯乙烯氧化物
PVAD/MoO₂ PVAD/MoO₂/Ag_2%	16.7 27.3	83.9 84.9	2.3 2.8
PVAD/MoO₂/Ag_4%	34.0	84.4	3.2
PVAD/MoO₂/Ag_7%	24.0	84.7	3.0
PVAD/MoO₂/Ag_10%	19.0	83.1	2.7

Study on oxidation of styrene with molecular oxygen catalyzed by MoO₂/Ag on polyionic liquid

聚离子液体载MoO₂/Ag催化分子氧氧化苯乙烯的研究

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Figures/Tables 15

References 47

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催化剂	氧化剂	温度/℃	时间/h	转化率/%	选择性/%	文献
PVAD/MoO₂/Ag	O₂	90	8	49.9	74.4	this work
PVAD/MoO₂/Ag	O₂	80	8	34.0	84.4	this work
MOF-74(Cu-30/Co-70)	O₂	80	20	30.4	43	[41]
Au NPs@XAD-4-G3.0 PAMAM	O₂	80	24	80	48	[42]
SO4^2--Fe-V/ZrO₂	H₂O₂	80	4	62.3	74.0	[43]
H₃PW₁₂O₄₀/SBA-15	H₂O₂	70	24	22.6	100.0	[44]
Mg_0.5Cu_0.5Fe₂O₄	H₂O₂	80	6	21.2	75.2	[45]
Ce_0.95Zr_0.05O₂	TBHP	80	12	70.2	31.3	[46]
ZSM-5(60)	TBHP	65	6	45.3	87.2	[47]

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