矽酸鹽孔洞材料具有高表面積、高熱穩定性、穩定的層狀結構和可調的孔徑大小等特質，利於作為催化劑、吸附劑、光學元件及陽極材料。本研究主要以綠色化學的角度，探討兩種不同金屬矽酸鹽材料（矽酸鋅和矽酸鎳）的合成及其於水中硫化物偵測和鋰離子電池陽極之應用。

第一部分: 以共沉澱法合成zinc silicate:Eu3+螢光粉與硫化物淬熄反應表現
於工業上，硫化物常以反應物或副產物的形式存在。由於硫化物與金屬具有強烈的活性，常造成反應設備和管線上的腐蝕與破壞，因此偵測水中硫化物的議題日益重要。據研究發現，光學材料於硫化物偵測銪相當高的靈敏度。傳統上，會以甲基藍作為硫化物的偵測器，但由於其前驅物具有致癌性，且此種方法並不具有再生性，所以本研究以較為環保原料及簡易的方法合成出以矽酸鋅為主體晶格、銪元素為發光基團的紅光螢光粉zinc silicate:Eu3+。利用此螢光粉對於水中特定陰離子產生螢光淬熄反應的特性，有效率的偵測水中硫化物。總體而言，本研究合成出的zinc silicate:Eu3+螢光粉具有環保、合成簡單、硫化物選擇性佳、靈敏度高、熱穩定性和再現性良好的優點。

第二部分: 以多層塗布法合成nickel silicate陽極材料與其電化學表現
本研究從綠色化學的概念出發，嘗試以天然氣發電廠的工業廢棄物作為二氧化矽源（Si/SiO2），以過渡金屬鎳作為金屬源合成金屬矽酸鎳陽極材料。金屬矽酸鹽穩定的層狀結構可使材料中的結晶矽不至於因為充放電過程中過度的體積膨脹而導致材料結構崩塌，使其成為鋰離子電池含矽的優良陽極材料。同時，本研究以多層塗布法，重複將矽酸鎳回加到金屬源溶液中，除了可以突破共沉澱法金屬擔載量的限制，且可以合成出外層有多層Ni(OH)2的矽酸鎳材料。此多層結構可有效提升整體的電容值，使鋰離子電池得到比共沉澱法合成的矽酸鎳高約200 mAhg-1的電容值。綜上所述，利用多層塗布法，以工業廢料合成的矽酸鎳陽極材料展現了高電容量(1128 mAhg-1），且賦予工業廢棄物一個二次利用的價值。

Mesoporous metal silicate materials with a high surface area, high thermal stability, stable layered structures, and a tunable pore size have many potential applications as catalysts, adsorbents, optical devices, and anode materials. This study synthesized two mesoporous metal silicate materials (zinc silicate and nickel silicate) for sulfide sensing and lithium-ion battery (LIB) applications, respectively.
The study commenced by developing an environmentally friendly sulfide sensor based on the fluorescence emissions of zinc silicate:Eu3+ phosphors. The optimal sensing performance was obtained by adjusting the pH value, Zn/Si ratio, and molar percentage of Eu3+ ions in the synthesis process. It was found that a reaction condition of pH 6 yielded a linear sensing performance for sulfide concentrations in the range of 3.12×10-6 to 3.12×10-5 M with a detection limit of 1.8×10-7 M and a Stern-Volmer constant (KSV) of 3.1×104 M-1. Overall, the zinc silicate:Eu3+ sulfide sensor showed many favorable properties, including nontoxicity, a simple synthesis process, good selectively, good sensitivity, good thermal stability, and high reproducibility.
The stable layered structure and high thermal stability of metal silicates render them an ideal anode material for LIBs. Accordingly, adopting the basic concepts of green chemistry, this study used industrial waste obtained from a gas generation plant as the silica source (Si/SiO2) for the synthesis of metal silicate based on nickel as the metal source. The electrochemical test results showed that the nickel silicate material prepared with a Ni/Si ratio of 1.5 exhibited a high initial capacity of 1128 mAhg-1 at 50 mAg-1 over the voltage range of 0.01 V ~ 2.5 V when used as the anode material in a LIB. Moreover, the capacity of the LIB was increased by 200 mAhg-1 by repeatedly adding the nickel silicate back to the metal source solution during the synthesis process and adjusting the pH to 9.0 each time. Thus, the feasibility of the proposed green synthesis route for the preparation of a high-performance nickel silicate anode material for LIBs was confirmed.

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