植物是自然界中主要的類別之一，其包含許多優勢與特性，例如: 再生性、環保、多樣性，以及容易取得等特性。在眾多特點中最為突出的是其結構，在多階層尺度下皆展現相當精細的形貌。已有研究嘗試以生物為模板來模仿植物細微結構。本研究以溶膠凝膠法來製備以植物為模板的二氧化鈦及碳酸鈣結構。製備流程為將前趨液滲透入植物模板，再於高溫段燒移去模板，鍛燒後的成品即為具有植物結構的複製產物。此實驗使用的植物模板包括:扶桑(Hibiscus rosa-sinensis Linn.), 木麻黃的果實(Casuarina equisetifolia L.)、肯氏南洋杉的葉子(Araucaria cunninghamii Sweet) 及蓮藕的根(Nelumbo nucifera)。實驗結果證明此方法可成功複製植物的微結構。XRD和EDS確認複製的產物為具銳鈦礦相的二氧化鈦及方解石相的碳酸鈣 。BET結果顯示二氧化鈦及碳酸鈣的結構性複製產物皆有較高的比表面積及較廣的孔洞分布。此外，DVS分析指出結構可明顯提升水氣的吸脫附能力。本研究提出以植物為模板之合成方法可進一步應用於汙染物淨化及生醫材料等領域。

Plants, a major category in nature, have many advantages and unique properties. They are renewable, ecofriendly, diverse, and easily accessible. One of the most characterized advantages is their structure. The structure displays intricate patterns at multiple scales. Some researchers are trying to mimic these special structures through templating. In this study, a sol-gel method by infiltrating the template with precursor and followed by calcination, is proposed to synthesize TiO2 and CaCO3 materials using different plants as templates, including China rose (Hibiscus rosa-sinensis Linn.), Iron wood (Casuarina equisetifolia L.) cone, Hoop pine (Araucaria cunninghamii Sweet) leaf and Lotus (Nelumbo nucifera) root. The results show that the micro-morphologies of plants can be well preserved in the replicas. XRD and EDS analyses confirm that the replicas are anatase TiO2 and calcite CaCO3. BET result proves that the replicas in both materials have higher surface area and wider distribution of pore size than that of powder. In addition, DVS data suggests the evident enhancement of vapor sorption-desorption ability of the replicas. The bio-templating technique investigated in this research can be further applied to pollutant purification and biomedical devices.

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