本文選題：鉍系化合物 + 半導(dǎo)體�。� 參考：《南京理工大學(xué)》2015年碩士論文

【摘要】：納米材料由于具有量子尺寸效應(yīng)、表面效應(yīng)、宏觀量子隧道效應(yīng)等特性,而在催化、光電設(shè)備、光電效應(yīng)和傳感器等領(lǐng)域有很大的應(yīng)用前景。鉍系化合物半導(dǎo)體材料更是以其優(yōu)良的可見光吸收能力、獨(dú)特的電子結(jié)構(gòu)而具有較優(yōu)異的光催化活性,受到了研究者們的廣泛關(guān)注。由于納米材料的物理和化學(xué)性質(zhì)與其形貌和尺寸有密切的關(guān)系,本文主要研究鉍系化合物半導(dǎo)體材料的可控合成,使用較簡(jiǎn)便的方法制備結(jié)構(gòu)新穎的鉍系化合物半導(dǎo)體材料,并研究了微結(jié)構(gòu)對(duì)性能的影響。具體內(nèi)容如下：(1)分別使用N,N-二甲基甲酰胺(DMF)和H2O溶解Bi(NO3)3和KOH,通過改變DMF/H2O的體積比分別制得了由菠蘿形花瓣及納米棒組成的花狀結(jié)構(gòu)、束狀和樹枝狀結(jié)構(gòu)的α-Bi2O3微晶,詳細(xì)研究了不同微結(jié)構(gòu)的形成機(jī)理。結(jié)果表明,樹枝狀Bi2O3微晶在可見光激發(fā)下對(duì)羅丹明B (RhB)的降解效果最好。(2)在氨水中使用檸檬酸鉍作為單一前驅(qū)體,通過水熱法制備得到了由納米片自組裝成的高度分散的蛋撻形狀Bi2O2CO3納米晶。氨水的濃度對(duì)Bi2O2CO3納米晶的形成起著至關(guān)重要的作用。所合成的蛋撻形Bi2O2CO3納米晶在紫外光激發(fā)下降解RhB時(shí)表現(xiàn)出了良好的光催化性能。(3)使用DMF作為溶劑,通過溶劑熱法制備了直徑為20 nm的HCOOBiO超長(zhǎng)納米線。所得到的高長(zhǎng)徑比納米線在水中具有良好的分散性,同時(shí)由于納米線表面帶有正電荷,使其對(duì)水中的陰離子污染物如Cr2O72-及甲基橙(MO)具有良好的吸附性能。另外,HCOOBiO納米線也表現(xiàn)出了較好的降解RhB的光催化活性。
[Abstract]:Due to its quantum size effect, surface effect and macroscopic quantum tunneling effect, nanomaterials have great application prospects in the fields of catalysis, photoelectric equipment, photoelectric effect and sensor. Bismuth compound semiconductor materials have attracted much attention because of their excellent visible light absorption and unique electronic structure. Because the physical and chemical properties of nanomaterials are closely related to their morphology and size, the controllable synthesis of bismuth compound semiconductor materials is studied in this paper. The effect of microstructure on the performance is also studied. The specific contents are as follows: (1) Bi(NO3)3 and Koch were dissolved by N (N) -dimethylformamide (DMF) and H _ 2O, respectively. By changing the volume ratio of DMF/H2O, 偽 -Bi _ 2O _ 3 microcrystals composed of pineapple petals and nanorods were obtained, respectively, and 偽 -Bi _ 2O _ 3 microcrystals composed of pineapple petals and nanorods were obtained. The formation mechanism of different microstructures was studied in detail. The results showed that dendritic Bi2O3 microcrystals could degrade Rhodamine B (RhB) by visible light, and bismuth citrate was used as a single precursor in ammonia solution. Highly dispersed egg tart shaped Bi2O2CO3 nanocrystals were prepared by hydrothermal method. The concentration of ammonia plays an important role in the formation of Bi2O2CO3 nanocrystals. The prepared egg tart Bi2O2CO3 nanocrystals showed good photocatalytic properties when decomposing RhB under UV irradiation. The ultralong HCOOBiO nanowires with diameter of 20 nm were prepared by solvothermal method using DMF as solvent. The obtained nanowires have good dispersibility in water and have good adsorption properties for anionic pollutants such as Cr _ 2O _ 72- and methyl orange monoxide due to the positive charge on the surface of nanowires. In addition, HCOOBiO nanowires also showed good photocatalytic activity for RhB degradation.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ135.32;TB383.1

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本文編號(hào)：1948336