本文選題：溴氧化鉍 + 氟化處理��； 參考：《分子催化》2017年02期

【摘要】：以五水硝酸鉍(Bi(NO_3)_3·5H_2O)和溴代十六烷基吡啶(CPB)為原料,通過水熱法合成溴氧化鉍(BiOBr)光催化劑,并在pH=3.3的條件下分別用0.01 mol/L、0.1 mol/L、0.3 mol/L NaF溶液對其進行浸泡氟化處理得新催化劑BiOBr-F_(0.01)、BiOBr-F_(0.1)和BiOBr-F_(0.3).運用XRD(X-射線衍射)、SEM(掃描電鏡)、UV-Vis DRS(紫外-可見漫反射光譜)、XPS(X-射線光電子能譜)、FL(熒光光譜)等技術(shù)對催化劑的物理結(jié)構(gòu)及性質(zhì)進行表征并研究了其在可見光(λ≥420 nm)下對有機染料羅丹明B(Rhodamine B,RhB)的催化降解活性.結(jié)果表明,隨著NaF濃度增加,催化劑的結(jié)構(gòu)及性質(zhì)均發(fā)生一定程度的改變.氟化使得BiOBr對RhB的礦化能力減弱;但BiOBr-F_(0.1)使RhB褪色加快.RhB在降解過程中涉及到超氧自由基(O_2~(·-))、羥基自由基(·OH)及空穴(h~+)氧化,礦化率減小歸因于活性物種產(chǎn)量降低,BiOBr-F_(0.1)使褪色加速則是加快了RhB的脫烷基過程,使最大吸收峰快速藍移.
[Abstract]:Bismuth oxide (BiOBr-BiOBr-O) photocatalysts were synthesized by hydrothermal method from BiNOSTH _ 3H _ 2O and CPB). The new catalysts BiOBr-FO _ (0.1) mol / L ~ (0.1) mol / L ~ (0.3) mol / L NAF solution were soaked in 0.01 mol / L ~ (0.1) mol 路L ~ (-1) 路L ~ (-1) / L NAF solution to obtain new catalysts, BiOBr-F _ (0.01) and BiOBr-F _ (0.1) and BiOBr-F _ (0. 3) respectively. The physical structure and properties of the catalyst were characterized by means of XRDX ray diffraction (SEM) UV-Vis DRS (UV-Vis DRS) and the visible light (位 鈮，

本文編號：1987638