奈米鎳－鈷層狀材料摻雜沸石咪唑複合材料合成與特性研究

Synthesis and Characterization of Ni-Co Layered Double Hydroxides Nanocomposites Blending Zeolitic Imidazolate Framework Composites

張博學(Po-hsueh Chang) ； 林鈺翔(Yu-xiang Lin) ； 黃觀瑩(Kuan-ying Huang) ； 陳邦旭(Pang-Shiu Chen) ； 王國平(Gaw-Pying Wang) ； 彭政雄(Cheng-Hsiung Peng)

《明新學報》 44卷2期 (2021/12) Pp. 44-65

摘要

本研究主要以共沉澱溶劑水熱法合成鎳鈷層狀雙氫氧化合物搭配離子置換法將碳酸根置換成硝酸根並摻雜沸石咪唑合成出奈米孔洞之複合材料。本實驗將氯化鎳與氯化鈷以共沉澱水熱法合成NiCo-LDHs粉末，並摻雜沸石咪唑，以製備一系列之奈米孔洞之複合材料。研究主要針對不同的合成比例與時間，進行探討不同結構與形態對於熱穩定性的影響。其中熱穩定性最高者為21NiCo-LDH@Zn_(1-5)-ZIF_8-20ml，其比表面積高達1158.9m^2g^(-1)。以熱重分析儀分析樣品摻雜後，發現21NiCo-LDH@Zn_(1-5)-ZIF_8-20ml樣品，其熱穩定性從原本80°C增加至400°C。有鑒於此，本研究之奈米複合材料未來可運用於相關氣敏材料，空間內空氣品質或危害環境之有毒氣體的氣體感測器，並探討其發展之可行性及潛力。

關鍵字

共沉澱 ； 溶劑水熱法 ； 鎳鈷層狀雙氫氧化合物 ； 沸石咪唑骨架 ； 離子置換法

並列摘要

In this study, the nanocomposite materials of Ni-Co layered double hydroxides (NiCo-LDHs)@zeolitic imidazolate framework were synthesized by the co-precipitation via solvent hydrothermal with an ion-exchange method. Firstly, NiCo-LDHs were synthesized using a co-precipitation hydrothermal method with NiCl_2 and CoCl_2 and blended with zeolite imidazole of different mole ratios to prepare a series of nanohole composites. In addition, the influence of other structures and morphology on thermal stability is discussed according to different synthesis ratios and time. Moreover, various reaction time were used for comparison, among which the highest thermal stability was 21NiCo-LDH@Zn_(1-5)-ZIF8-20ml, and the specific surface area was as high as 1158.9m^2g^(-1). Furthermore, the thermal stability of the 21NiCo-LDH@Zn_(1-5)-ZIF8-20ml samples showed that excellent properties with the increase from 80°C to 400°C, respectively. Finally, the proposed nanocomposites could be applied to gas-sensitive materials, air quality in space, or toxic gases that are harmful to the environment, such as gas sensors for TVOCs, acetone, methane, etc., feasibility and potential of their development were explored.

並列關鍵字

co-precipitation ； solvent hydrothermal method ； Ni-Co layered double hydroxides ； zeolitic imidazlate frameworks ； ion exchange method

參考文獻

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