Study on Soft Chemistry Preparation and Performance of BaTiO3⁃TiO2 Composites

doi:10.3969/j.issn.1006-396X.2022.04.007

Journal of Petrochemical Universities ›› 2022, Vol. 35 ›› Issue (4): 46-51.DOI: 10.3969/j.issn.1006-396X.2022.04.007

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Study on Soft Chemistry Preparation and Performance of BaTiO₃⁃TiO₂ Composites

Ruonan Zhang(), Shijie He, Xiaorong Wang, Fangfang Wang, Changdong Chen()

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

Received:2022-04-11 Revised:2022-07-29 Online:2022-08-25 Published:2022-09-27
Contact: Changdong Chen

BaTiO₃⁃TiO₂复合体的软化学制备及其性能研究

张若男(), 何仕婕, 王晓蓉, 王芳芳, 陈常东()

辽宁石油化工大学石油化工学院，辽宁抚顺 113001

通讯作者: 陈常东
作者简介:张若男（1997⁃），女，硕士研究生，从事光（电）催化材料方面的研究；E⁃mail：1611139786@qq.com。
基金资助:
教育部“春晖计划”合作科研项目(2020703?8);国家留学基金委公派访学学者面上项目(CSC202008210025);辽宁省教育厅科学技术研究项目(L2020009);辽宁石油化工大学博士科研启动基金项目(2016xJJ?076)

Abstract

Abstract:

The BaTiO₃?TiO₂ composites were prepared by using hydrate barium hydroxide (Ba(OH)₂·8H₂O) and titanium dioxide (TiO₂) as raw materials with soft chemical hydrothermal method at 120 ℃ and different Ba/Ti molar ratios.The structure of the prepared composites with different Ba/Ti molar ratios was analyzed by X?ray diffraction (XRD),scanning electron microscopy (SEM),and UV?visible absorption spectroscopy (UV?Vis),the degradation effect of the complex on the simulated degradation pollutant,rhodamine B (RhB) was investigated.The results indicate that the BaTiO₃?TiO₂ composites obtained at a Ba/Ti molar ratio of 0.50 have an excellent catalytic effect for the degradation of rhodamine B (RhB) during the simulation of dye wastewater degradation.Meanwhile,more active sites formed at the Ba/Ti molar ratio of 0.50, which facilitated the photocatalytic reaction.

Key words: BaTiO₃?TiO₂, Soft chemical, Photocatalyst, Heterostructure

摘要：

以八水合氢氧化钡(Ba(OH)₂·8H₂O)、二氧化钛(TiO₂)为原料，采用软化学水热的制备方法，在120 ℃的温度下，通过调控不同n（Ba）/n（Ti）合成了BaTiO₃?TiO₂复合体。通过X射线衍射（XRD)、扫描电镜（SEM）、紫外?可见吸收光谱（UV?Vis）等测试手段，研究了不同n（Ba）/n（Ti）条件下所得到的复合体的结构，并考察了复合体对模拟降解污染物——罗丹明B（RhB)的降解效果。结果表明，当n（Ba）/n（Ti）=0.50时，BaTiO₃?TiO₂复合体对罗丹明B的降解率最大，催化效果最好；同时，n（Ba）/n（Ti）=0.50时，所形成BaTiO₃?TiO₂复合体的活性位点最多，有助于光催化反应的进行。

关键词: BaTiO₃?TiO₂, 软化学, 光催化, 异质结构

CLC Number:

TQ134.1

Ruonan Zhang, Shijie He, Xiaorong Wang, Fangfang Wang, Changdong Chen. Study on Soft Chemistry Preparation and Performance of BaTiO₃⁃TiO₂ Composites[J]. Journal of Petrochemical Universities, 2022, 35(4): 46-51.

张若男, 何仕婕, 王晓蓉, 王芳芳, 陈常东. BaTiO₃⁃TiO₂复合体的软化学制备及其性能研究[J]. 石油化工高等学校学报, 2022, 35(4): 46-51.

Figures/Tables 7

Fig.1 XRD spectra of samples prepared under n(Ba)/n(Ti)=0.25,0.50,0.75,1.00 conditions at 120 °C

Fig.2 SEM plot of samples prepared under n（Ba）/ n（Ti）=0.25，0.50，0.75，1.00 conditions at 120 °C

Fig.3 Particle size analysis plot at 120 °C,n（Ba）/n（Ti）=0.25，0.50，0.75，1.00

Fig.4 Effect of sample preparation under n（Ba）/n（Ti）=0.25，0.50，0.75，1.00 conditions on the degradation performance of rhodamine B

Fig.5 UV?Vis diffuse reflection absorption spectrum at TiO2,BaTiO3 and Ba / Ti molar ratios is 0.50 and Tauc diagram

Fig.6 Effects of different trapping agents on the photocatalyst properties of n（Ba）/n（Ti）=0.50

Fig.7 Schematic diagram of the migration path of photogenerated electrons in the BaTiO3?TiO2 complex

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