Effect of Ethanol Concentration on the Phase Evolution  of Ag/γ-Al2O3 During Solvothermal Process

Qing TANG; Ruixing LI; Shu YIN; Tsugio SATO

doi:10.14852/jcersjsuppl.112.0.S46.0

Journal of the Ceramic Society of Japan, Supplement 112-1, PacRim5 Special Issue

セッションID: 1

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S46.0

会議情報

主催: The Ceramic Society of Japan

共催: Iketani Science and Technology Foundation, International Ceramic Federation, Commemorative Organization for the Japan World Exposition '70, The American Ceramic Society, The Australasian Ceramic Society, The Chinese Ceramic Society, The Korean Ceramic Society, Joint Research Consortium of Synergy Ceramics/Fine Ceramics Research Association, Nanotechnology Researchers Network Center of Japan, The Special Coordination Funds for Promoting Science and Technology, Japan National Tourist Organization, Aichi Prefectural Government, CASIO SCIENCE PROMOTION FOUNDATION, DAIKO FOUNDATION, Nagoya Convention and Visitors Bureau, The Asahi Glass Foundation, The Kao Foundation For Arts And Sciences, The Murata Science Foundation, The Ogasawara Foundation for the Promotion of Science & Engineering, ASAHI GLASS CO., LTD. Research Center, CENTRAL GLASS CO., LTD., ELECTRIC GLASS INDUSTRY ASSOCIATION OF JAPAN (EGAJ), Hattori Company, Ltd., Hitachi Research Laboratory, Hitachi, Ltd., HOYA CORPORATION, INAX Corporation, ITOCHU CERATECH CORP., Japan Cement Association, KYOCERA Corporation, KYUSHU REFRACTORIES CO., LTD., MINO CERAMIC CO., LTD., Murata Manufacturing Co., Ltd., NGK INSULATORS LTD., NGK SPARK PLUG CO., LTD., NICHIAS Corporation, NIKKO COMPANY, Nippon Electric Glass Co., Ltd., Nippon Sheet Glass Co., Ltd., NORITAKE CO., LIMITED, Tokuyama Corporation, TOTO LTD.

Papers

Effect of Ethanol Concentration on the Phase Evolution of Ag/γ-Al₂O₃ During Solvothermal Process

Qing TANG, Ruixing LI, Shu YIN, Tsugio SATO

著者情報

キーワード: Silver, γ-Al₂O₃, Solvothermal process, Nanoparticles, Ethanol, Water, Phase evolution, γ-AlOOH

会議録・要旨集フリー

詳細

抄録

Solvothermal treatment of AgNO₃ in alcohol-water mixed solvent dispersed with γ-alumina (γ-Al₂O₃) powders at 498 K for 2 h was conducted to prepare Ag/(γ-Al₂O₃) composite powders for catalysts. The influence of ethanol content on the crystalline phase and microstructure of solvothermal products was investigated. With decreasing ethanol content in the solvent, the alumina matrix phase gradually changes from γ-Al₂O₃ to boehmite (γ-AlOOH), accordingly, the ratio of larger rhombic γ-AlOOH to smaller needle-like γ-Al₂O₃ increased. This phase change resulted in the decrease of the BET specific surface area and total pore volume and a shift of the characteristic pore size and pore size distribution. During the solvothermal treatment in ethanol/water mixed solvents, silver nanoparticles precipitated from the solution to form Ag/(γ-AlOOH, γ-Al₂O₃) nano-composites whereas no precipitation occurred in pure water.

責任著者(Corresponding author)

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