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(中文): 羥基磷灰石支持的二氧化鈦光催化劑的合成 及對復合污染物的光降解研究 (英文): The Research of the Compound of the Titanium Dioxide Accrete on the Hydroxyapatite and Its Photodegradtion to Complex Contamination 目 錄摘要 2一.前言 4(一)羥基磷灰石的組成和晶體結構 4(二)二氧化鈦及光催化氧化及還原原理 4(三)復合污染和Cr(VI)和苯酚的危害性 6(四)協(xié)同光催化 6二. 實驗部分 7(一)試劑與儀器 7(二)合成步驟 7三. 結果與討論 8(一)樣品表征 8(二)光催化活性實驗 11四. 結論 13參考文獻 13致謝 17羥基磷灰石支持的二氧化鈦光催化劑的合成及對復合污染物的光降解研究摘 要羥基磷灰石(hydroxyapatite,縮寫為HA或HAP)是一種微溶于水的弱堿性磷酸鈣鹽,理論組成為Ca10(PO4)6 (OH)2,屬于六方晶系,P63/m空間群,晶胞參數為a0=b0 =~ nm,c0=~ nm。由于其晶體結構的可調變性,Ca2+可以被 Ba2+, Sr2+, Cd2+, and Pb2+ 和 P5+ 可以被V5+, Cr5+取代,而晶體機結構保持不變,因此可以利用HAP對許多離子的吸附和交換作用,在處理重金屬污染的水時,將其作為吸附劑,將重金屬離子固定在其表面。本文以KNO3和 LiNO3為助熔劑,以硝酸鈣和磷酸氫二銨法和氟化鉀為原料來合成羥基磷灰石,測試其對鉻離子的吸附能力,在此基礎上用檸檬酸修飾,通過鈦酸丁酯在其表面的水解并焙燒負載上二氧化鈦,得到產物簡稱為HAPTi。通過光催化原理既降解水中的有機污染物,又將水中的Cr6+還原為三價Cr3+離子,最后將Cr6+固定在HAP上,達到治理的綜合污染的水的治理。本文通過X射線衍射儀、紅外吸收光譜、掃描電子顯微鏡以及透射電子顯微鏡對合成的樣品進行了表征,又通過紫外分光光度法法對測定負載二氧化鈦的羥基磷灰石進行光降解水中復合污染物的能力。關鍵詞:羥基磷灰石 二氧化鈦 光催化 復合污染物The Research of the Compound of the Titanium Dioxide Accrete on the Hydroxyapatite and Its Photodegradtion to Complex ContaminationAbstract: Hydroxyapatite (abbreviated as HA or HAP) is a kind of alkalescent calcium phosphate slightly soluble in water. Its theoretic position is Ca10(PO4)6 (OH)2 belonging to hexagonal system, P63/m space group。 and its cell parameter is a0=b0 =~ nm,c0=~ nm. its crystalstructure is tolerant tomanyionic substitutions and pletereplacement of Ca2+ by Ba2+, Sr2+, Cd2+, and Pb2+ and P5+ byV5+, Cr5+, and As5+ is possible. Hydroxyapatite is a kind of porosity material, which has larger surface area and activity. So, it made hydroxyapatite own sorption and obtain the ability that others accrete on the surface of hydroxyapatite. In this paper, we use KNO3 and (NH4)2HPO4 to pound hydroxyapatite, in order to test the absorption of Cr6+ in water, and after plated the Titanium dioxide on the surface of hydroxyapatite by TBOT under the circumstance of citric acid to photodegrade the plex contamination via visible light, thus it will get rid of pollution.Key words: Hydroxyapatite Titanium dioxide Photodegradtion Complex Contamination第一章 前言 羥基磷灰石的組成和晶體結構羥基磷灰石的應用是由其獨特的晶體化學結構決定的,羥基磷灰石的理論組成為Ca10(PO4)6 (OH)2 ,為六方晶系,屬于P63/m空間群,晶胞參數為a0=b0 =~ nm,c0=~ nm。單位晶胞含有l(wèi)0個Ca2+ 、6個PO4