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  本文選題：磷酸銀 + 氧化鋅�。� 參考：《天津工業(yè)大學》2017年碩士論文

【摘要】：微/納米材料因具有量子效應、小尺寸效應、表面效應、宏觀量子隧道效應等獨特的特性,在催化、傳感、儲能等領(lǐng)域具有廣泛的應用。制備新穎的納米材料、控制其形貌、研究其生長機制等成為該領(lǐng)域研究的熱點。本論文以半導體金屬鹽和氧化物(Ag_3PO_4和ZnO)微納米材料為研究對象,制備出新穎的磷酸銀和氧化鋅納米材料,并探討其可能形成的機理,測試了半導體材料的光催化性能和氣敏活性。本論文的具體工作有以下幾個方面:(1)采用直接沉淀法,利用酒石酸輔助合成出磷酸銀中空微球納米結(jié)構(gòu),分布均勻,得到中空微球的直徑約在8 μm。根據(jù)不同的反應時間,探討了磷酸銀中空微球可能的形成機制,提出了奧斯特瓦爾德熟化的機理。降解羅丹明B(RhB)溶液的實驗結(jié)果表明,磷酸銀中空微球在可見光下表現(xiàn)出了非常好的光催化性能。(2)采用簡單的直接沉淀法,用聚乙二醇(PEG)作為表面活性劑,成功制備出四足狀磷酸銀納米晶體。該結(jié)構(gòu)的足長度約為16 μm。我們通過X-射線衍射(XRD)、掃描電子顯微鏡(SEM)等手段對其結(jié)構(gòu)、形貌進行表征。通過對比實驗,討論了不同PEG加入量對磷酸銀形貌結(jié)構(gòu)產(chǎn)生的影響。此外,磷酸銀在可見光光催化下催化降解亞甲基藍,顯示良好的光催化活性。(3)通過十二烷基磺酸鈉(SDS)調(diào)控,用水熱法合成出了梳狀氧化鋅。為了考察氧化鋅的氣敏活性,對所制備的梳狀氧化鋅進行了氣敏性能的測試,結(jié)果表明,梳狀氧化鋅對乙醇、甲苯有氣敏活性,相比而言,甲苯的氣敏性能高于乙醇;同時,我們也進行了光催化測試,在紫外光的照射下,在光降解亞甲基藍(MB)溶液中,梳狀氧化鋅表現(xiàn)了較好的光催化活性。
[Abstract]:Due to their unique properties such as quantum effect, small size effect, surface effect and macroscopic quantum tunneling effect, micro / nano materials have been widely used in the fields of catalysis, sensing, energy storage and so on. The preparation of novel nanomaterials, the control of their morphology and the study of their growth mechanism have become the focus of research in this field. In this paper, the novel silver phosphate and zinc oxide nanomaterials were prepared by using the semiconductor metal salts and oxide (AgSn3PO4 and ZnO) nanomaterials as the research objects, and the possible mechanism of their formation was discussed. The photocatalytic properties and gas sensitivity of semiconductor materials were tested. The main work of this thesis is as follows: (1) the silver phosphate hollow microspheres were synthesized by direct precipitation method and tartaric acid. The diameter of the hollow microspheres was about 8 渭 m. According to different reaction time, the possible formation mechanism of silver phosphate hollow microspheres was discussed, and the mechanism of Ostwald ripening was proposed. The experimental results of degradation of Rhodamine B (RhB) solution show that silver phosphate hollow microspheres exhibit excellent photocatalytic properties under visible light. (2) simple direct precipitation method and polyethylene glycol (PEG) as surfactant are used. Quadruped silver phosphate nanocrystals were successfully prepared. The foot length of the structure is about 16 渭 m. The structure and morphology were characterized by X ray diffraction (XRD) and scanning electron microscopy (SEM). The effects of PEG addition on the morphology and structure of silver phosphate were discussed by contrast experiments. In addition, silver phosphate can catalyze the degradation of methylene blue under visible light, showing good photocatalytic activity. (3) comb-like zinc oxide was synthesized by hydrothermal method under the control of sodium dodecyl sulfonate (SDS). In order to investigate the gas sensing activity of zinc oxide, the gas sensing properties of the prepared comb-like zinc oxide were tested. The results showed that the combed zinc oxide had gas sensing activity to ethanol and toluene, and toluene had higher gas sensitivity than ethanol, and at the same time, the gas sensitivity of the combed zinc oxide was higher than that of ethanol. The photocatalytic activity of combed zinc oxide in methylene blue (MB) solution was studied.
【學位授予單位】：天津工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB383.1;O643.36

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