无有机模板剂水热合成Co同晶取代的丝光沸石分子筛

引用本文: 王琦, 吴雅静, 王军, 林晓. 无有机模板剂水热合成Co同晶取代的丝光沸石分子筛[J]. 物理化学学报, 2012, 28(09): 2108-2114. doi: 10.3866/PKU.WHXB201206181 shu

Citation: WANG Qi, WU Ya-Jing, WANG Jun, LIN Xiao. Organotemplate-Free Hydrothermal Synthesis of Isomorphously Co-Substituted Mordenite Molecular Sieve[J]. Acta Physico-Chimica Sinica, 2012, 28(09): 2108-2114. doi: 10.3866/PKU.WHXB201206181 shu

无有机模板剂水热合成Co同晶取代的丝光沸石分子筛

王琦 ^1, ,
吴雅静 ^2, ,
王军 ^1, ,
林晓 ^1,

基金项目:
国家自然科学基金(21136005, 21101094, 20976084)资助项目 (21136005, 21101094, 20976084)

摘要:

在硅酸钠、硫酸铝、硝酸钴和氢氧化钠的全无机体系条件下, 采用无有机模板剂水热法合成了Co同晶取代的丝光沸石分子筛. 通过粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、电感耦合等离子体(ICP)光谱、氮气吸附、紫外-可见(UV-Vis)光谱、热重(TG)分析等手段对所得固体产物的织构性质以及钴在分子筛中的存在状态进行了表征. 结果表明, 该方法成功地将Co离子引入到丝光沸石分子筛的骨架结构中, 未发现骨架外Co物种. 典型的合成条件为n(Co)/n(SiO₂) =0.01-0.04, n(SiO₂)/n(Al₂O₃) =20-50, n(H₂O)/n(SiO₂) =40, n(Na₂O)/n(SiO₂)=0.4, 晶化温度170 °C, 晶化时间3-7 d. 讨论了Na+离子在无有机模板剂合成中的结构导向作用. 全无机体系合成得到的产物无需进行传统的高温煅烧处理, 即可获得开放的微孔孔道, 实现了低成本、低能耗、环境友好的Co-丝光沸石的合成.

关键词:

English

Organotemplate-Free Hydrothermal Synthesis of Isomorphously Co-Substituted Mordenite Molecular Sieve

1.
1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China;
2. College of Sciences, Nanjing University of Technology, Nanjing 210009, P. R. China
Received Date: 26 April 2012
Available Online: 02 August 2012
Fund Project:
国家自然科学基金(21136005, 21101094, 20976084)资助项目

Abstract:

An organotemplate-free hydrothermal route was investigated for synthesizing isomorphously Co-substituted mordenite molecular sieve using only the inorganic raw materials such as sodium silicate, aluminum sulfate, cobalt nitrate, and sodium hydroxide. Textural properties and Co ion states for the obtained solid products were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), inductively coupled plasma (ICP), nitrogen adsorption, ultraviolet-visible (UV-Vis) spectra, and thermogravimetric (TG) analysis. The results showed that Co ions were incorporated into the framework structure of the mordenite without the presence of extra-framework Co species. Typical synthesis conditions were n(Co)/n(SiO₂)=0.01-0.04, n(SiO₂)/n(Al₂O₃)=20-50, n(H₂O)/n(SiO₂)=40, n(Na₂O)/ n(SiO₂) =0.4, crystallization temperature 170 ° C, and crystallization time 3-7 d. The structure-directing function of Na+ ions in the absence of an organic template was discussed. Products obtained by the present allinorganic systems possess open micropores and do not require traditional high-temperature calcination. Thus, we demonstrate a low cost, low energy consumption, and environmentally benign synthesis of Co-mordenite.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

无有机模板剂水热合成Co同晶取代的丝光沸石分子筛

English

Organotemplate-Free Hydrothermal Synthesis of Isomorphously Co-Substituted Mordenite Molecular Sieve

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中国化学会秘书处

无有机模板剂水热合成Co同晶取代的丝光沸石分子筛

English

Organotemplate-Free Hydrothermal Synthesis of Isomorphously Co-Substituted Mordenite Molecular Sieve

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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