本文選題：光催化 + UO_2~(2+)還原�。� 參考：《東華理工大學(xué)》2017年碩士論文

【摘要】：核工業(yè)的發(fā)展促進(jìn)了人類社會(huì)的巨大進(jìn)步,與此同時(shí)也產(chǎn)生了大量的核廢料六價(jià)鈾,對(duì)人類健康和生態(tài)環(huán)境帶來極大的危害,是人類迫切需要解決的重大環(huán)境問題。本論文研究光催化還原技術(shù)還原去除六價(jià)鈾污染。本論文研究了硼摻雜g-C_3N_4和石墨烯型碳材料-碳納米籠作為半導(dǎo)體光催化還原六價(jià)鈾污染,我們以硼酸和硫脲為前驅(qū)體,通過熱聚合法,一步制備硼摻雜g-C_3N_4光催化材料;以苯為前驅(qū)物,通過化學(xué)氣相沉積法,制備得到石墨烯型碳納米籠光催化。論文中,我們研究了硼的摻雜形態(tài)和含量對(duì)g-C_3N_4基光催化材料的可見光的吸收、價(jià)帶和導(dǎo)帶電位、光電子遷移和利用效率的影響,于此同時(shí),我們也研究了碳納米籠制備溫度對(duì)碳納米籠光學(xué)性質(zhì)、電學(xué)性質(zhì)以及電子結(jié)構(gòu)的影響,確定硼摻雜g-C_3N_4和碳納米籠光催化材料表面電子結(jié)構(gòu)與光催化還原六價(jià)鈾性能之間的定性、定量關(guān)系,揭示了光催化機(jī)理,為新型高效光催化還原去除六價(jià)鈾催化劑的設(shè)計(jì)與開發(fā)提供依據(jù)。
[Abstract]:The development of nuclear industry has promoted the great progress of human society. At the same time, it has also produced a large amount of nuclear waste hexavalent uranium, which has brought great harm to human health and ecological environment, and is an important environmental problem urgently needed to be solved by human beings. In this paper, the photocatalytic reduction technology for the removal of hexavalent uranium pollution is studied. In this paper, boron doped g-C_3N_4 and graphene carbon nano-cage were used as semiconductor photocatalytic reduction of hexavalent uranium contamination. Boric acid and thiourea were used as precursors to prepare boron doped g-C_3N_4 photocatalytic materials by thermal polymerization. Graphene carbon nanocage photocatalysis was prepared by chemical vapor deposition with benzene as precursor. In this paper, we studied the effects of boron doping morphology and content on visible light absorption, valence band and conduction band potential, photoelectron transport and utilization efficiency of g-C_3N_4 based photocatalytic materials. We also studied the effects of preparation temperature on optical, electrical and electronic properties of carbon nanocage, and determined the relationship between the surface electronic structure of boron doped g-C_3N_4 and carbon nano-cage photocatalytic materials and the photocatalytic reduction of hexavalent uranium. The quantitative relationship reveals the photocatalytic mechanism and provides the basis for the design and development of a new type of highly efficient photocatalytic reduction catalyst for removal of hexavalent uranium.
【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O643.36

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 Fan Dong;Yuhan Li;Wingkei Ho;Haidong Zhang;Min Fu;Zhongbiao Wu;;Synthesis of mesoporous polymeric carbon nitride exhibiting enhanced and durable visible light photocatalytic performance[J];Chinese Science Bulletin;2014年07期

2 陳剛;高尚鵬;;Structure and electronic structure of S-doped graphitic C_3N_4 investigated by density functional theory[J];Chinese Physics B;2012年10期

3 謝水波;王水云;張浩江;劉迎九;王勁松;;硫酸鹽還原菌還原U(Ⅵ)的影響因素與機(jī)制[J];環(huán)境科學(xué);2009年07期

，

本文編號(hào)：1885528