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Citation: Liang Xin-Yi, Ma Zhi, Bai Zheng-Chen, Qin Yong-Ning. Properties and Sonochemical Preparation of Nanostructured LaNiO₃[J]. Acta Physico-Chimica Sinica, ;2002, 18(06): 567-571. doi: 10.3866/PKU.WHXB20020620 shu

Properties and Sonochemical Preparation of Nanostructured LaNiO₃

1.
School of Engineering of Tianjin University of Commerce, Tianjin　300400;College of Chemical Engineering, Tianjin University, Tianjin 　300072

Received Date: 16 October 2001
Available Online: 15 June 2002

Nanostuctured LaNiO3 was prepared by coprecipitation under ultrasonic radiation. Using XRD, TEM, BET, XPS, TPR and evaluation of catalytic activity, the effects of ultrasound on the structured properties and catalytic activity of LaNiO3 were studied. The result of TEM showed that the ultrasound could cause decrease of particle size. The average particle size of LaNiO3 prepared by sonochemistry is 20 nm (see Fig.2b). The specific surface area of LaNiO3 is 11.27 m2•g－1 by BET. The Oads/Oads on surface are 1.25 (ultrasound) and 1.01(without ultrasound) by XPS (see Fig.4). It showed that ultrasound could lead to increase surface content oxide and increase number of surface crystal oxygen vacancies. The result of TPR showed LaNiO3 prepared by sonochemistry has lower reduction temperature and bigger ratio of surface oxygen to crystal oxygen (see Table 1). The result of evaluation of catalytic activity showed that ultrasound could increase that catalytic activity of LaNiO3 for NO decomposition (see Fig.6). The role played by of ultrasound was discussed.
- Ultrasound;Catalysis;Nanometer LaNiO₃ oxide;Preparation
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Properties and Sonochemical Preparation of Nanostructured LaNiO₃