Au-Pd/ZrO2可见光下催化苯甲醇氧化反应条件探索

doi:10.11962/1006-4990.2019-0345

摘要/Abstract

摘要：

利用硼氢化钠还原法制备出Au-Pd/ZrO₂负载型双金属纳米催化剂,采用XRD、UV-vis DRS、TEM等手段对催化剂的结构、吸光能力、粒度、形貌等性能进行表征。结果显示,金、钯成功负载于二氧化锆上,且金、钯以球形颗粒均匀分散。可见光照射下,研究了Au-Pd/ZrO₂双金属纳米催化剂对苯甲醇氧化生产苯甲醛反应的适宜条件。实验结果显示,可见光照射下,反应时间为12 h、反应温度为（35±3） ℃、5.0 mL异丙醇为溶剂、50 mg Au-Pd（2:1）/ZrO₂为催化剂、1.0 mmol氢氧化钾为碱源的条件下,苯甲醇氧化生产苯甲醛产率最佳。

关键词: Au-Pd/ZrO₂, 双金属催化剂, 苯甲醇, 光催化, 苯甲醛

Abstract:

Au-Pd/ZrO₂ supported bimetallic nanocatalysts were prepared by the reduction method of NaBH₄.The structure,absorbance,particle size and morphology of the catalysts were characterized by means of X-ray diffraction（XRD）,UV-vis diffuse reflectance spectroscopy（UV-vis DRS） and transmission electron microscopy（TEM） etc..The results indicated that the Au and Pd were loaded on ZrO₂ successfully,and Au and Pa were uniformly dispersed as spherical particles.Under visible light irradiation,the suitable conditions were studied for the oxidation of benzyl alcohol to benzaldehyde by Au-Pd/ZrO₂ bimetallic nanocatalysts.The experiment results showed that the best yield of oxidation preparing benzaldehyde by benzyl al-cohol was obtained,under the conditions as follows：visible light irradiation,reaction time of 12 h,reaction temperature of （35±3） ℃,isopropanol of 5.0 mL as the solvent,Au-Pd（2:1）/ZrO₂ of 50 mg as the catalyst and NaOH of 1.0 mmol as the basic source.

Key words: Au-Pd/ZrO₂, bimetallic catalyst, benzyl alcohol, photocatalysis, benzaldehyde

中图分类号:

TQ134.12

白红亮,王俊生,王艳. Au-Pd/ZrO₂可见光下催化苯甲醇氧化反应条件探索[J]. 无机盐工业, 2020, 52(4): 100-103.

Bai Hongliang,Wang Junsheng,Wang Yan. Study on oxidation reacting conditions of benzyl alcohol catalyzed by Au-Pd/ZrO₂ under visible light[J]. Inorganic Chemicals Industry, 2020, 52(4): 100-103.

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参考文献 18

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序号	溶剂	产率/%（光照）	产率/%（暗）
1	均三甲苯	30.5	8.8
2	甲苯	34.2	10.6
3	异丙醇	62.0	20.5
4	N,N-二甲基甲酰胺	20.5	5.6
5	二甲基亚砜	18.8	3.2

序号	催化剂	碱	产率/%（光照）	产率/%（暗）
1	Au-Pd（2:1）/ZrO₂	Na₂CO₃	45.2	18.0
2	Au-Pd（2:1）/ZrO₂	K₂CO₃	48.4	20.2
3	Au-Pd（2:1）/ZrO₂	CsCO₃	56.2	25.0
4	Au-Pd（2:1）/ZrO₂	KOH	90.2	35.0
5	Au-Pd（2:1）/ZrO₂	NaOH	88.5	31.0
6	ZrO₂	KOH	8.0	3.2
7	Au/ZrO₂	KOH	50.6	20.8
8	Pd/ZrO₂	KOH	20.2	8.2
9	Au-Pd（1:1）/ZrO₂	KOH	62.0	20.2
10	Au-Pd（2:1）/ZrO₂	KOH	90.2	35.0
11	Au-Pd（1:2）/ZrO₂	KOH	78.0	31.0

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Au-Pd/ZrO₂可见光下催化苯甲醇氧化反应条件探索

Study on oxidation reacting conditions of benzyl alcohol catalyzed by Au-Pd/ZrO₂ under visible light

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