メソポーラスシリカの合成と鉛吸着特性−鉛吸着材料への利用の検討−

■化学食品部 笹木哲也 嶋田一裕 田畑裕之

 本研究では,有機-無機ハイブリッドメソポーラスシリカの鉛吸着材料への利用の可能性を評価した。3タイプ4種類のメソポーラスシリカを合成し,X線回折,電子顕微鏡,比表面積/細孔分布測定で細孔構造を,蛍光X線分析,X線光電子分光分析,赤外分光分析で導入した有機基を評価した。合成材料の水溶液中の鉛の吸着率を評価し,有機基の導入により鉛吸着率が向上したことを確認した。また,吸着率と構造との因果関係を評価し,細孔径が2-5nmの領域では径が大きい方が吸着に有利であることがわかった。
キーワード:メソポーラスシリカ,有機-無機ハイブリッド材料,吸着材料

A Study on Lead Adsorption Property of Synthesized Mesoporous Silica

Tetsuya SASAKI, Kazuhiro SHIMADA and Hiroyuki TABATA

In this study, the possibility of the application of organic-inorganic hybrid mesoporous silica to lead (Pb) adsorbent was investigated. Four kinds of mesoporous silica, which were classified into three different types according to their structures, were synthesized. Their pore structures were examined by the X-ray diffraction method, electron microscopy and nitrogen adsorption measurement, and the organic groups contained in them were observed by X-ray fluorescence analysis, X-ray photoelectron spectroscopy and infrared spectroscopy. As a result of the experiments using the synthesized materials with pore sizes of 2 to 5 nm in diameter, the existence of organic groups was effective in increasing Pb adsorption, and the materials with larger pores enabled more Pb adsorption.

Keywords:mesoporous silica, organic-inorganic hybrid material, Pb adsorbent


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