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 2 μm 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

TrendMD:

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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