Citation: Rong Chun XIONG, Xiao Dong LEI, Gang WEI. Controlling Pore Size and its Distribution of γ-Al₂O₃ Nanofiltration Membranes[J]. Chinese Chemical Letters, ;2003, 14(9): 969-972. shu

Controlling Pore Size and its Distribution of γ-Al₂O₃ Nanofiltration Membranes

Beijing University of Chemical technology, Beijing 100029

Received Date: 9 September 2002

Fund Project: This work is financially supported by the National Key Technologies R&D Programme Item (2002BA313B01) of China.

The preparation process of γ-Al₂O₃ nanofiltration membranes were studied by N₂ absorption and desorption test and retention rate vs thickness gradient curve method.It was found that template and thermal treatment were key factors for controlling pore size and its distribution.Under the optimized experimental conditions, the BJH (Barret-Joyner-Halenda) desorption average pore diameter, BJH desorption cumulative volume of pores and BET (Brunauer-Emmett-Teller) surface area of obtained membranes were about 3.9 nm, 0.33 cm³/g and 245 m²/g respectively, the pore size distribution was very narrow.Pore size decreased with the increasing of thickness and no evident change after the dense top layer was formed.The optimum thickness can be controlled by retention rate vs thickness gradient curve method.
- Nanofiltration,
- γ-Al₂O₃ membrane,
- membrane pore size,
- N₂ absorption-desorption test
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