Dispersion of CuCl2 into NaY Zeolite Studied by Positrons

Abstract

Abstract: A series of samples, prepared from mechanical mixtures of CuCl₂ with NaY zeolite and resulting in the dispersion of CuCl₂, was studied by positron annihilation spectroscopy. We measured the positron lifetime spectroscopy as a function of the weight ratio of the CuCl₂-NaY zeolite heated at 140 ℃ for 1 h as well as at 450 ℃ for 4 h, respectively. We also measured it as a function of the heated temperature of 1 h, and as a function of the time heated at 300 ℃ for CuCl₂-NaY(mass ratio 0.01). All lifetime spectras were resolved into five(or four) components, in which the third, the fourth and the fifth components were related to the annihilation in β cage, supercage and interface void, respectively. The experimental results showed that positron annihilation spectroscopy was sensitive to probe the change of the dispersion of a few of CuCl₂ in NaY zeolite, and there was much CuCl₂ remained on the outside surface of NaY after heated at high temperature for a long time even for a few of CuCl₂.

Key words: Positron annihilation spectroscopy, Copper chloride, Zeolite

CLC Number:

TQ426.61

TrendMD:

ZHU Jun, WANG Shao-Jie, LUO Xi-Hui . Dispersion of CuCl₂ into NaY Zeolite Studied by Positrons[J]. Chem. J. Chinese Universities, 2002, 23(11): 2159.

[1]	YAO Yiting, LYU Jiamin, YU Shen, LIU Zhan, LI Yu, LI Xiaoyun, SU Baolian, CHEN Lihua. Preparation of Hierarchical Microporous-mesoporous Fe₂O₃/ZSM-5 Hollow Molecular Sieve Catalytic Materials and Their Catalytic Properties for Benzylation [J]. Chem. J. Chinese Universities, 2022, 43(8): 20220090.
[2]	CHEN Weiqin, LYU Jiamin, YU Shen, LIU Zhan, LI Xiaoyun, CHEN Lihua, SU Baolian. Preparation of Organic Hybrid Mesoporous Beta Zeolite for Alkylation of Mesitylene with Benzyl Alcohol [J]. Chem. J. Chinese Universities, 2022, 43(6): 20220086.
[3]	LI Zhiguang, QI Guodong, XU Jun, DENG Feng. Role of Catalyst Acidity in Glucose Conversion over Sn-Al-β Zeolite as Studied by Solid-state NMR [J]. Chem. J. Chinese Universities, 2022, 43(6): 20220138.
[4]	LI Jiafu, ZHANG Kai, WANG Ning, SUN Qiming. Research Progress of Zeolite-encaged Single-atom Metal Catalysts [J]. Chem. J. Chinese Universities, 2022, 43(5): 20220032.
[5]	MENG Xianglong, YANG Ge, GUO Hailing, LIU Chenguang, CHAI Yongming, WANG Chunzheng, GUO Yongmei. Synthesis of Nano-zeolite and Its Adsorption Performance for Hydrogen Sulfide [J]. Chem. J. Chinese Universities, 2022, 43(3): 20210687.
[6]	WEI Lina, PENG Li, ZHU Feng, GU Pengfei, GU Xuehong. Preparation of Au-CeZr/FAU Catalytic Membranes for Preferential Oxidation of CO in H₂-rich Stream [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220175.
[7]	LI Yichuan, ZHU Guofu, WANG Yu, CHAI Yongming, LIU Chenguang, HE Shengbao. Effects of Substrate Surface Properties and Precursor Chemical Environment on In⁃situ Oriented Construction of Titanium Silicalite Zeolite Membranes [J]. Chem. J. Chinese Universities, 2021, 42(9): 2934.
[8]	LUO Qiangqiang, JIN Shaoqing, SUN Hongmin, YANG Weimin. Post-synthesis of Ti-MWW Zeolite via Titanium Incorporation in Liquid Acid Solution [J]. Chem. J. Chinese Universities, 2021, 42(9): 2742.
[9]	ZHANG Xu, QUE Jiaqian, HOU Yuexin, LYU Jiamin, LIU Zhan, LEI Kunhao, YU Shen, LI Xiaoyun, CHEN Lihua, SU Baolian. Hierarchical Mesoporous-microporous TS-1 Single Crystal Catalysts for Epoxidation of Allyl Chloride [J]. Chem. J. Chinese Universities, 2021, 42(8): 2529.
[10]	WANG Lei, SUN Tantan, YAN Nana, MA Chao, LIU Xiaona, TIAN Peng, GUO Peng, LIU Zhongmin. Exploring Organic Structure-directing Agents Used for SAPO-34 to Synthesize SSZ-13 [J]. Chem. J. Chinese Universities, 2021, 42(6): 1716.
[11]	LI Jian, YU Mingming, SUN Yuan, FENG Wenhua, FENG Zhaochi, WU Jianfeng. Effect of Aqueous Solution pH on the Oxidation of Methane to Methanol at Low Temperature [J]. Chem. J. Chinese Universities, 2021, 42(3): 776.
[12]	WANG Juan, WANG Linying, ZHU Dali, CUI Wenhao, WANG Yifeng, TIAN Peng, LIU Zhongmin. Progress in Direct Synthesis of High Silica Zeolite Y [J]. Chem. J. Chinese Universities, 2021, 42(1): 1.
[13]	WEN Jiali, ZHANG Junhao, JIANG Jiuxing. Extra-large Pore Zeolites： a Ten-year Updated Review [J]. Chem. J. Chinese Universities, 2021, 42(1): 101.
[14]	WANG Jianyu, ZHANG Qiang, YAN Wenfu, YU Jihong. Roles of Hydroxyl Radicals in Zeolite Synthesis [J]. Chem. J. Chinese Universities, 2021, 42(1): 11.
[15]	LIU Yi, LIU Yi. Research Progress on Zeolite Layer Preparation via Oriented Seeded Growth [J]. Chem. J. Chinese Universities, 2021, 42(1): 117.

Dispersion of CuCl₂ into NaY Zeolite Studied by Positrons

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments