Preparation of Pd/Al<sub>2</sub>O<sub>3</sub>@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties

ZHANG Zuqiang; ZHANG Tong; ZHANG Xiongfu

doi:10.11949/j.issn.0438-1157.20150280

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Preparation of Pd/Al₂O₃@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties

更新时间：2025-12-10

- Preparation of Pd/Al₂O₃@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties
- CIESC Journal Issue 10, Pages: 3925-3930(2015)
- 作者机构：
  
  大连理工大学化工学院, 精细化工国家重点实验室,辽宁,大连,116024
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150280
  CLC： 643
- Online First：05 October 2015，
  
  Published：05 October 2015
- 稿件说明：
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ZHANG Zuqiang, ZHANG Tong, ZHANG Xiongfu. Preparation of Pd/Al₂O₃@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties[J]. CIESC Journal, 2015, (10): 3925-3930. DOI: 10.11949/j.issn.0438-1157.20150280.
DOI：

ZHANG Zuqiang, ZHANG Tong, ZHANG Xiongfu. Preparation of Pd/Al₂O₃@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties[J]. CIESC Journal, 2015, (10): 3925-3930. DOI: 10.11949/j.issn.0438-1157.20150280. DOI：

摘要

利用同源氧化锌有利于ZIF-8结构的成核生长原理

采用粒径为1~2 mm 的负载型Pd/Al2O3微球作为核、ZIF-8膜作为外壳

ZnO诱导生长制备了Pd/Al2O3@ZIF-8核壳催化剂

用XRD、EDX、SEM、ICP等分析手段对其结构进行了表征

并采用不同大小分子烯烃加氢反应对其壳层连续完整性进行了性能测试。结果表明

Pd/Al2O3微球表面预先引入的ZnO纳米粒子层对外层连续ZIF-8膜壳层的形成

起到了很好的成核生长点和连接点的作用

诱导合成了连续完整的ZIF-8膜包覆的Pd/Al2O3@ZIF-8核壳结构材料

ZIF-8膜层的厚度可通过ZIF-8合成的次数进行调变。该Pd/Al2O3@ZIF-8核壳催化剂对不同分子大小的烯烃加氢反应表现出明显的筛分选择性

并对外加苯并噻唑作为毒物分子的反应体系具有良好的抗中毒性能和防催化活性金属Pd组分流失的功能。

Abstract

A novel Pd/Al2O3@ZIF-8 core-shell catalyst was successfully prepared by ZnO-induced coating of a layer of ZIF-8 shell over the Pd/Al2O3 bead with a mean diameter of 1—2 mm. The obtained Pd/Al2O3@ZIF-8 core-shell catalyst was characterized by XRD

EDX

SEM and ICP analysis techniques

and employed as catalyst for the liquid-phase hydrogenation of alkenes. It was found that the introduction of ZnO layer and subsequent pretreatment of the ZnO layer played vital roles in the formation of continuous and compact ZIF-8 shell. Furthermore

the thickness of the ZIF-8 shell could be tuned by altering the assembly cycles of ZIF-8. Results of the catalytic reactions showed that the Pd/Al2O3@ZIF-8 catalyst exhibited better size-selectivity

poison-resistance and leaching-proof properties in contrast to the naked Pd/Al2O3 catalyst.

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Preparation of Pd/Al2O3@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties

DOI：10.11949/j.issn.0438-1157.20150280

摘要

Abstract

关键词

Keywords

references

Preparation of Pd/Al₂O₃@ZIF-8 core-shell catalyst by ZnO-induced growth and its catalytic properties