选用硝酸铋、氯化钾、溴化钠为反应原料,乙二醇为反应媒介,经溶剂热反应制备了花簇结构的BiOCl和BiOBr微球。反应体系引入聚乙烯吡咯烷酮(PVP)后可明显改变BiOBr微球的表面形貌和直径尺寸,生成了核桃球状的BiOBr微球。通过X射线粉末衍射、扫描电子显微镜等表征技术对所制备材料进行了表征,并以罗丹明B为模拟污染物对上述不同表面形貌的光催化剂的可见光催化性能进行了评价。结果表明:BiOCl和BiOBr微球的光催化性能接近,PVP促进了BiOBr纳米片的紧密排列并充分利用了可见光,提升了光催化活性,有利于罗丹明B产生快速的光降解作用。
The bismuth oxychloride (BiOCl) and bismuh oxybromide (BiOBr) inflorescence-like microspheres were synthesized by a solvothermal method with Bi(NO3)3,KCl and NaBr as raw materials and ethylene glycol as reaction media.The addition of polyvinyl pyrrolidone (PVP) contributed to the formation of walnut-like BiOBr-PVP microspheres with the uniform diameter.The X-ray powder diffraction (XRD) and scanning electron microscope (SEM) were performed to characterize the structures of these bismuth-based photocatalysts.The rhodamine B was used as the model pollutant to assess their photocatalytic performance through visible light.The test results showed that the photocatalytic performance of BiOCl and BiOBr was almost same.However,the BiOBr-PVP microspheres showed the excellent photocatalytic performance among the three photocatalysts.The walnut-like structures composed with adjacent nanoplates were beneficial to the absorption of light and the fast degradation of rhodamine B.
[1] Schneider J,Matsuoka M,Takeuchi M,et al.Understanding TiO2 photocatalysis:mechanisms and materials[J].Chemical Reviews,2014,114(19):9919-9986.
[2] 唐茂,夏杨雯,喻强,等.ZnTiO3/TiO2复合光催化材料研究进展[J].化工新型材料,2021,49(6):51-54,60.
[3] 陶萍芳,覃利琴,秦荣欢,等.溴化银/碳酸银复合催化剂的制备及其光催化性能研究[J].化工新型材料,2021,49(6):201-205.
[4] 田冬梅,王梓倩,王俊清.BiOBr/BiOCl催化剂的制备及光催化性能[J].沈阳师范大学学报(自然科学版),2021,39(2):98-102.
[5] 孙新宇,李会鹏,赵华,等.卤氧化铋在光催化领域的研究进展[J].石油化工,2021,50(5):479-486.
[6] Li J,Yu Y,Zhang L Z.Bismuth oxyhalide nanomaterials:layered structures meet photocatalysis[J].Nanoscale,2014,6(15):8473-8488.
[7] Jaihindh D P,Fu Y P.Facile synthesis of deep eutectic solvent assisted BiOCl/BiVO4@AgNWs plasmonic photocatalysts under visible light enhanced catalytic performance[J].Catalysis Today,2017,297:246-254.
[8] 谭湘庭.氯氧铋精矿及其冶炼工艺综述[J].湖南有色金属,1993(2):92-96,112.
[9] Zhang L,Cao X F,Chen X T,et al.BiOBr hierarchical microspheres:microwave-assisted solvothermal synthesis,strong adsorption and excellent photocatalytic properties[J].Journal of Colloid and Interface Science,2011,354(2):630-636.
[10] Geng J,Hou W H,Lv Y N,et al.One-dimensional BiPO4 nanorods and two-dimensional BiOCl lamellae:fast low-temperature sonochemical synthesis,characterization,and growth mechanism[J].Inorganic Chemistry,2005,44:8503-8509.
[11] Guo X H,Zhou X J,Li X H,et al.Bismuth oxychloride (BiOCl)/copper phthalocyanine(CuTNPc) heterostructures immobilized on electrospun polyacrylonitrile nanofibers with enhanced activity for floating photocatalysis[J].Journal of Colloid and Interface Science,2018,525(1):187-195.
[12] Narenuch T,Senasu T,Chankhanittha T,et al.Solvothermal synthesis of CTAB capped and SDS capped BiOCl photocatalysts for degradation of rhodamine B(RhB) dye and fluoroquinolone antibiotics[J].Journal of Solid State Chemistry,2021,294:121824.
[13] Tian F,Xiong J Y,Zhao H P,et al.Mannitol-assisted solvothermal synthesis of BiOCl hierarchical nanostructures and their mixed organic dye adsorption capacities[J].CrystEngComm,2014,16:4298-4305.
[14] 牛凤兴,蒋帅,高晓明,等.BiOCl/ZnO复合光催化剂的制备及其光催化性能[J].功能材料,2021,52(6):6190-6194.
[15] Shi X J,Chen X,Chen X L,et al.PVP assisted hydrothermal synthesis of BiOBr hierarchical nanostructures and high photocatalytic capacity[J].Chemical Engineering Journal,2013,222:120-127.
[16] 刘红旗,顾晓娜,陈锋,等.BiOCl纳米片微球的制备及其形成机理[J].催化学报,2011,32(1):129-134.
基金资助
国家自然科学基金(21507107)
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