【摘要】：載運(yùn)作為連接國(guó)民經(jīng)濟(jì)體系的橋梁,提高載運(yùn)工具的節(jié)能環(huán)保能力有著重要現(xiàn)實(shí)意義。稀土摻雜的固態(tài)照明光源在汽車、船舶和飛機(jī)等載運(yùn)工具上的運(yùn)用,可大幅減少能源的消耗,提高這些載運(yùn)工具的節(jié)能環(huán)保能力。同時(shí)稀土離子溫度傳感和光熱轉(zhuǎn)換特性有望在載運(yùn)工具精密微電子儀器的監(jiān)測(cè)和維護(hù)上具有潛在應(yīng)用。納米科學(xué)技術(shù)的發(fā)展賦予了低維納米材料的新的光、電、磁、聲和催化性能,實(shí)現(xiàn)低維納米材料的可控合成具有重要意義,因此成為了當(dāng)前的熱門研究課題。此外,稀土摻雜的光熱轉(zhuǎn)換材料在船舶壓載水的微生物滅活領(lǐng)域還存在著潛在應(yīng)用。本文研究了稀土摻雜微納米材料的濕法化學(xué)可控合成,并對(duì)這些稀土離子在低維納米材料中的溫度傳感和光熱轉(zhuǎn)換特性進(jìn)行了詳細(xì)的研究,主要研究成果如下:(1)采用微波水熱法成功地制備了 CaSn03、NaYF_4、YP04、NaLa(W04)2和NaLa(Mo04)2微納結(jié)構(gòu)材料,證明了微波水熱合成在無機(jī)物體系合成中普適性,并對(duì)這些樣品的晶體學(xué)和形貌學(xué)特征進(jìn)行了表征和分析,結(jié)果證明所合成的樣品大部分為純相且其形貌受配合物和反應(yīng)溶液pH值等因素的影響。(2)采用微波水熱法制備了 NaY(WO_4)_2微米花球,樣品的XRD表征結(jié)果證實(shí)所得產(chǎn)物為純相NaY(WO_4)_2。樣品SEM表征結(jié)果說明了配合物Na3Cit的用量對(duì)產(chǎn)物形貌的影響,據(jù)此推論出了 NaY(WO_4)_2微米花球的可能的生長(zhǎng)機(jī)理。(3)實(shí)現(xiàn)了微波水熱條件下NaY(MoO_4)_2多種微納米結(jié)構(gòu)的可控合成,研究了反應(yīng)溶液pH值、配合物濃度、反應(yīng)物濃度等因素對(duì)產(chǎn)物晶相和形貌的影響,給出了 NaY(WO_4)_2微納米結(jié)構(gòu)的可能的生長(zhǎng)機(jī)理。(4)研究了Er~(3+)離子在NaY(WO_4)_2微米花球體系中的溫度傳感特性,揭示了樣品形貌、Er~(3+)離子摻雜濃度和Yb~(3+)離子摻雜濃度對(duì)Er~(3+)離子溫度傳感特性的微弱影響。以Er~(3+)摻雜的NaY(WO4)2微米花球?yàn)闊晒鉁囟忍结?研究了 Tm~(3+)摻雜NaY(WO_4)_2微米花球的光熱轉(zhuǎn)換特性,證明了 Tm~(3+)離子與Er~(3+)相比,Tm~(3+)離子具有更高的光熱轉(zhuǎn)換效率。(5)以Er~(3+)摻雜的NaY(MoO_4)_2納米棒為熒光溫度探針,研究了Sm~(3+)摻雜同基質(zhì)材料的光熱轉(zhuǎn)換特性。結(jié)果證明,Sm~(3+)離子和Yb~(3+)離子的摻雜濃度都會(huì)對(duì)樣品的光熱轉(zhuǎn)換特性產(chǎn)生影響,且Yb~(3+)離子的濃度影響更為顯著。(6)采用高溫?zé)峤夥ǔ晒χ苽淞?NaYF_4:Er~(3+)/Yb~(3+)@NaYF_4:Sm~(3+)/Yb~(3+)納米核殼結(jié)構(gòu),XRD表征結(jié)果證明所合成的樣品為純相,且殼層包覆使樣品的結(jié)晶度更好。TEM表征結(jié)果證明殼層Yb~(3+)摻雜離子濃度的變化對(duì)產(chǎn)物的最終尺寸和形貌有影響。實(shí)現(xiàn)了核層的溫度傳感和殼層的光熱轉(zhuǎn)換,且加熱效果受殼層Yb~(3+)離子濃度的影響。
[Abstract]:As a bridge connecting the national economic system, it is of great practical significance to improve the energy saving and environmental protection ability of transportation tools. The application of rare-earth doped solid state lighting source in vehicles, ships and aircraft can greatly reduce the energy consumption and improve the energy saving and environmental protection ability of these vehicles. At the same time, the temperature sensing and photothermal conversion characteristics of rare earth ions are expected to have potential applications in monitoring and maintenance of precision microelectronic instruments. With the development of nanometer science and technology, the new optical, electrical, magnetic, acoustic and catalytic properties of low-dimensional nanomaterials have become a hot research topic. It is of great significance to realize the controllable synthesis of low-dimensional nanomaterials. In addition, rare earth doped photothermal conversion materials have potential applications in the field of microbial inactivation of ship ballast water. In this paper, the wet chemically controlled synthesis of rare earth doped micro and nano materials is studied, and the temperature sensing and photothermal conversion characteristics of these rare earth ions in low dimensional nanomaterials are studied in detail. The main results are as follows: (1) CaSn03,NaYF_4,YP04,NaLa (W04) 2 and NaLa (Mo04) 2 microstructures were successfully prepared by microwave hydrothermal method. The crystallographic and morphologic characteristics of these samples were characterized and analyzed. The results show that most of the synthesized samples are pure phase and their morphology is influenced by the complex and pH value of reaction solution. (2) NaY (WO_4) _ 2 micron flower spheres were prepared by microwave hydrothermal method. The XRD characterization of the sample confirmed that the product was pure phase NaY (WO_4) _ 2. The results of SEM characterization showed that the amount of complex Na3Cit affected the morphology of the product. The possible growth mechanism of NaY (WO_4) _ 2 microspheres was deduced. (3) the controllable synthesis of NaY (MoO_4) _ 2 microstructures under hydrothermal conditions was achieved, and the pH value of reaction solution and the concentration of complex were studied. The effect of reactant concentration on the crystal phase and morphology of the product, The possible growth mechanism of NaY (WO_4) _ 2 microstructures was given. (4) the temperature sensing properties of Er~ (3) ions in NaY (WO_4) _ 2 micron-sphere system were studied, and the morphology of the samples was revealed. The weak effect of Er~ (3) ion doping concentration and Yb~ (3) ion doping concentration on the temperature sensing characteristics of Er~ (3) ion. Using Er~ (3) doped NaY (WO4) 2 microsphere as the fluorescence temperature probe, the photothermal conversion characteristics of Tm~ (3) doped NaY (WO_4) 2 microsphere were studied. It was proved that the Tm~ (3) ion was compared with Er~ (3). Tm~ (3) ions have higher photothermal conversion efficiency. (5) Er~ (3) doped NaY (MoO_4) _ 2 nanorods were used as fluorescence probe to investigate the photothermal conversion properties of Sm~ (3) doped with the substrate. The results show that the doping concentration of Sm~ (3) and Yb~ (3) ions will affect the photothermal conversion characteristics of the samples. The effect of Yb~ (3) ion concentration was more significant. (6) NaYF_4:Er~ (3) / Yb~ (3) @ NaYF_4:Sm~ (3) / Yb~ (3) nanocrystalline core-shell structure was successfully prepared by high temperature pyrolysis. The results of XRD show that the synthesized samples are pure phase, and the crystallinity of the samples is improved by coating the shell layer. The results of TEM characterization show that the change of the concentration of Yb~ (3) doped ions in the shell layer has an effect on the final size and morphology of the product. The temperature sensing of the core layer and the photothermal conversion of the shell layer are realized, and the heating effect is affected by the concentration of Yb~ (3) ions in the shell layer.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：U664.92

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