Studies on Synthesis of a New Hexagonal Copper Aluminophosphate and Its Catalytic Behavior for Phenol Hydroxylation

Abstract

Abstract:

A new type of non-soluble copper aluminophosphate(denoted as CuAlPO) was synthesized by static hydrothermal crystallization and characterized by using several physicochemical techniques.XRD analysis reveals that CuAlPO can be obtained from a reactive gel of molar composition: iso-Pr₂NH∶0.3CuO∶0.7Al₂O₃∶P₂O₅∶80H₂O in a Teflon-lined stainless steel autoclave at 180℃ for 72 h and has the same crystal structure as that of hexagonal SiO₂(JCPDS No.83-2299).The sources of CuO,Al₂O₃ and P₂O₅ were copper sulfate pentahydrate,aluminum isopropoxide and o-phosphoric acid(mass fraction:85%),respectively.SEM shows a characteristic hexagonal morphology and a crystallite size of about 2μm for both the as-synthesized CuAlPO and the calcined CuAlPO(550℃,6h).Low specific surace area(2.0 m²/g) and pore volume(0.004 mL/g) of CuAlPO were observed by N2-adsorption measurement.Catalytic evaluation tests demonstrate that an excellent transformation of phenol into catechol and hydroquinone over the material was achieved in water under the benign reaction conditions with a phenol conversion of 295% being observed at room temperature(30℃).

Key words: Hexagonal copper aluminophosphate; Phenol hydroxylation via catalysis; Hydrogen peroxide, Hexagonal copper aluminophosphate, Phenol hydroxylation via catalysis, Hydrogen peroxide

CLC Number:

O643.36

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QI Xing-Yi,WANG Zhi-Yong,ZHANG Li-Li,FAN Xue-Tao,XIE Wen-Hua,FENG Zhi-Hua. Studies on Synthesis of a New Hexagonal Copper Aluminophosphate and Its Catalytic Behavior for Phenol Hydroxylation[J]. Chem. J. Chinese Universities, 2005, 26(12): 2357.

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Studies on Synthesis of a New Hexagonal Copper Aluminophosphate and Its Catalytic Behavior for Phenol Hydroxylation

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