本研究成功的以溶膠凝膠法製備介孔洞二氧化矽顆粒，接著以鐵氰化鉀作為蝕刻劑，蝕刻二氧化矽顆粒製得中空型態之二氧化矽顆粒；此外，我們以二氧化矽顆粒作為載體，透過溶膠凝膠方式將二氧化鈦披覆於二氧化矽顆粒上製得二氧化矽/二氧化鈦複合顆粒；最後以化學溶液方式將銅鋅錫硫奈米顆粒披覆於二氧化矽/二氧化鈦顆粒上製得二氧化矽/二氧化鈦/銅鋅錫硫複合顆粒。由於中空型態二氧化鈦顆粒製備較繁雜且產率低，因此皆介孔洞二氧化矽顆粒作為載體，進行光催化及吸附實驗。本論文因材料製備的方式的不同分為四個部分。
第一部分為製備介孔洞二氧化矽顆粒，藉由改變不同CTAB含量可製得粒徑為150 nm至650 nm的二氧化矽顆粒，BET比表面積分析得知，以介孔洞二氧化矽顆粒的比表面積為1300 m2/g。
第二部分為製備中空型態之介孔洞二氧化矽顆粒，透過鐵氰化鉀作為蝕刻劑，蝕刻二氧化矽奈米顆粒，中空型態之二氧化矽顆粒。
第三部分為製備二氧化矽/二氧化鈦顆粒，由光催化實驗、紫外/可見光光譜分析、EDS元素分析得知，光催化效率與鈦含量成正比關係。
第四部分為製備二氧化矽/二氧化鈦/銅鋅錫硫複合顆粒，從吸附實驗及紫外/可見光光譜分析結果得知，摻入少量之二氧化矽/二氧化鈦/銅鋅錫硫複合顆粒於15分鐘內即可將10 ppm 之Acid Black 1染料完全吸附。

In this research, we successfully prepared the mesoporous silica spheres by sol-gel method. We have used the potassium hexacyanoferrate (K3Fe(CN)6) as etching agent to get mesoporous hollow SiO2 spheres. In addition, the TiO2 nanoparticles were coated on the as-prepared SiO2 spheres as a carrier to prepare SiO2/TiO2 composite spheres by sol-gel method. Further, we also deposited Cu2ZnSnS4 nanocrystals on SiO2/TiO2 composite spheres to form SiO2/TiO2/CZTS composite spheres by chemical solution method.Because it was hard to prepare mesoporous hollow silica spheres and the yield of it was low,we chosen mesoporous silica spheres as carrier to do the photocatalytic and adsorbent experiment. This study can be divided into four parts.
The first part explained the preparation of different sizes of mesoporous silica spheres. We prepared the SiO2 spheres with different sizes from 150 to 650 nm by using different concentration of CTAB.BET results showed that the active surface area SiO2 spheres was 1300 m2/g.
The second part demonstrated the preparation of mesoporous hollow SiO2 spheres. The potassium hexacyanoferrate was used to etching SiO2 spheres. We obtained hollow SiO2 spheres as confirmed by TEM.
The third part explained the coating of TiO2 nanoparticles on SiO2 spheres. The prepared SiO2/TiO2 composite spheres were used for the degradation of AB 1 dye under irradiation of UV. From XRD, UV spectra and EDS result, we can know the SiO2/TiO2 composite spheres with high content of TiO2 nanoparticles had the best photocatalytic activity.
The final part demonstrated the deposition of Cu2ZnSnS4 nanocrystals on SiO2/TiO2 composite spheres. The prepared CZTS deposited SiO2/TiO2 composite spheres were used for adsorption of AB 1 dye. The SiO2/TiO2/CZTS composite spheres could adsorb 50 mL of 10 ppm of Acid Black 1 dye solution within 15min.

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