当前位置: X-MOL 学术Ultrason. Sonochem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A novel Z-scheme sonocatalyst system, Er3+:Y3Al5O12@Ni(Fe0.05Ga0.95)2O4-Au-BiVO4, and application in sonocatalytic degradation of sulfanilamide
Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2018-03-22 , DOI: 10.1016/j.ultsonch.2018.03.010
Guowei Wang , Siyi Li , Xue Ma , Jing Qiao , Guanshu Li , Hongbo Zhang , Jun Wang , Youtao Song

A novel Z-scheme coated composite, Er3+:Y3Al5O12@Ni(Fe0.05Ga0.95)2O4-Au-BiVO4, was designed for sonocatalytic degradation of sulfanilamide and fabricated by sol-hydrothermal and calcination methods. The prepared sample was characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), UV-vis diffuse reflectance spectra (DRS), fourier transform infrared (FT-IR) spectra, Raman spectra and photoluminescence (PL) spectra. In Er3+:Y3Al5O12@Ni(Fe0.05Ga0.95)2O4-Au-BiVO4, Ni(Fe0.05Ga0.95)2O4 and BiVO4 form a Z-scheme sonocatalytic system, Er3+:Y3Al5O12 as an up-conversion luminescence agent (from visible-light to ultraviolet-light) provids the ultraviolet-light for satisfying the energy demand of wide band-gap Ni(Fe0.05Ga0.95)2O4 and Au nanoparticles as co-catalyst forms more active sites to enrich electrons. Also, Au nanoparticles as conductive channels promotes the electrons (e) from conduction band of BiVO4 to transfer to valence band of Ni(Fe0.05Ga0.95)2O4. Due to the characteristics of valence state diversity, the Fe3+ and V5+ constitute a redox reaction recombination system, which can also push electrons (e) on conduction band of BiVO4 to quickly transfer to valence band of Ni(Fe0.05Ga0.95)2O4. The sonocatalytic activity of Er3+:Y3Al5O12@Ni(Fe0.05Ga0.95)2O4-Au-BiVO4 nanocomposite was detected through degradation of sulfanilamide under ultrasonic irradiation. A high sonocatalytic degradation ratio (95.64%) of sulfanilamide can be obtained when the conditions of 10.00 mg/L sulfanilamide, 1.00 g/L Er3+:Y3Al5O12@Ni(Fe0.05Ga0.95)2O4-Au-BiVO4, 300 min ultrasonic irradiation and 100 mL total volume were adopted. Some factors such as ultrasonic irradiation time and cycle number on the sonocatalytic degradation efficiency are also investigated by using TOC and UV-vis spectroscopy. Subsequently, the effects of hydroxyl radicals (•OH) and hole scavengers were investigated to elaborate the mechanism. The researches show that the prepared Z-scheme Er3+:Y3Al5O12@Ni(Fe0.05Ga0.95)2O4-Au-BiVO4 coated composite displayed an excellent sonocatalytic activity in degradation of sulfanilamide under ultrasonic irradiation.

© 2017 Elsevier B.V. All rights reserved.



中文翻译:

新型Z方案声催化剂Er 3+:Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.952 O 4 -Au-BiVO 4的研究及其在磺酰胺降解中的应用

设计了一种新型的Z型涂层复合材料Er 3+:Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.952 O 4 -Au-BiVO 4,用于超声催化降解磺胺,并通过溶胶-水热法和煅烧法制备。方法。制备的样品通过X射线衍射仪(XRD),透射电子显微镜(TEM),扫描电子显微镜(SEM),X射线光电子能谱(XPS),能量色散X射线能谱(EDX),UV-vis进行表征。漫反射光谱(DRS),傅立叶变换红外(FT-IR)光谱,拉曼光谱和光致发光(PL)光谱。在Er 3+中:Y 3Al 5 O 12 @Ni(Fe 0.05 Ga 0.952 O 4 -Au-BiVO 4,Ni(Fe 0.05 Ga 0.952 O 4和BiVO 4形成Z方案声催化系统,Er 3+:Y 3 Al 5 O 12作为上转换发光剂(从可见光到紫外光)提供了满足宽带隙Ni(Fe 0.05 Ga 0.952 O 4的能量需求的紫外光。金纳米粒子作为助催化剂形成更多的活性位以富集电子。此外,金纳米粒子作为导电通道促进电子(e - )从BiVO的导带4转移到镍的价带(铁0.050.952 ö 4。由于价态多样性的特点,铁3+和V 5+构成的氧化还原反应重组系统,其也可以推电子(e - )上的BiVO传导带4能够快速传送到镍的价带(铁0.05 Ga 0.952 O 4。通过超声辐射下磺胺的降解来检测Er 3+:Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.952 O 4 -Au-BiVO 4纳米复合材料的声催化活性。能够得到磺胺甲高声催化降解率(95.64%)时10.00毫克/升磺胺的条件,1.00克/升二3+:Y 3的Al 5 Ô 12 @Ni(铁0.050.952 ö 4 -金-BiVO 4,采用300分钟超声波照射和100 mL总体积。还通过TOC和UV-vis光谱法研究了超声辐照时间和循环次数等因素对声催化降解效率的影响。随后,研究了羟基自由基(•OH)和空穴清除剂的作用,以阐明其机理。研究表明,制备的Z-方案Er 3+:Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.952 O 4 -Au-BiVO 4包覆的复合材料在超声辐照下对磺胺的降解具有良好的声催化活性。

©2017 Elsevier BV保留所有权利。

更新日期:2018-03-22
down
wechat
bug