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.)
Sonochemical synthesis of WS2 nanosheets and its application in sonocatalytic removal of organic dyes from water solution
Ultrasonics Sonochemistry ( IF 8.7 ) Pub Date : 2018-06-15 , DOI: 10.1016/j.ultsonch.2018.06.003
Alireza Khataee , Paria Eghbali , Mahsa Haddad Irani-Nezhad , Aydin Hassani

In this research, tungsten disulfide (WS2) nanosheets as sonocatalyst were synthesized through a sonochemical route. Characterization of as-synthesized sonocatalyst was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron dispersive X-ray spectroscopy (EDX), Dot-mapping, high resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) analysis. WS2 nanosheets were evaluated for their sonocatalytic performance in order to remove basic violet 10 (BV10) under ultrasonic irradiation. The removal efficiency was maximized (94.01%) via the use of 1 g L-1 catalyst and 10 mg L-1 BV10 at pH = 4.5 and an ultrasonic power of 400 W within a reaction time of 150 min. In addition to BV10, the sonocatalytic elimination for a number of organic dyes viz. direct blue 71, acid blue 92, methylene blue, basic orange 2 and basic red 46 was examined to demonstrate the performance of WS2 nanosheets under the ultrasonic irradiation. The experimentation of trapping was conducted using edetate disodium (EDTA-2Na), tert-butyl alcohol (t-BuOH), and benzoquinone (BQ). According to the results, all radicals participated in the sonocatalytic activity. OH played a more prominent role than h+ and O2-in the process of BV10 separation. Following five repetitive runs, the nanocomposites revealed a reusability of circa 18% drop in the elimination efficiency. The main removal intermediates were recognized by GC-MS technique.



中文翻译:

WS 2纳米片的声化学合成及其在声催化去除水溶液中有机染料中的应用

在这项研究中,通过声化学途径合成了二硫化钨(WS 2)纳米片作为声催化剂。通过X射线衍射(XRD),扫描电子显微镜(SEM),电子色散X射线光谱(EDX),点映射,高分辨率透射电子显微镜(HRTEM),Brunauer- Emmett-Teller(BET),傅立叶变换红外光谱(FTIR)和紫外可见漫反射光谱(UV-vis DRS)分析。评估WS 2纳米片的声催化性能,以便在超声辐射下去除碱性紫10(BV10)。通过使用1 g L -1 催化剂和10 mg L -1可以最大程度地提高去除效率(94.01%) 在150分钟的反应时间内,pH = 4.5的BV10和400 W的超声功率。除BV10外,还对多种有机染料进行了声催化消除。检查了直接蓝71,酸性蓝92,亚甲基蓝,碱性橙2和碱性红46,以证明WS 2纳米片在超声辐射下的性能。使用乙二胺四乙酸二钠(EDTA-2Na),叔丁醇(t - BuOH)和苯醌(BQ)进行捕获实验。根据结果​​,所有自由基都参与了声催化活性。 OH的作用比h +Ø2个--在BV10分离过程中。经过五次重复运行,纳米复合材料的消除效率降低了约18%。主要去除中间体已通过GC-MS技术进行了识别。

更新日期:2018-06-15
down
wechat
bug