دورية أكاديمية
Visible light-induced catalytic performance of composite photocatalyst synthesized with nanomaterials WO3 and two-dimensional ultrathin g-C3N4
| العنوان: | Visible light-induced catalytic performance of composite photocatalyst synthesized with nanomaterials WO3 and two-dimensional ultrathin g-C3N4 |
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| المؤلفون: | Dongmei Li, Wenxin Zhang, Yi Huang, Haoxuan Feng, Zilin Wang, Zhuohong Yang, Jingkai Chen, Xueqiang Zhang, Gangyi Zhang, Yanbing Chen |
| المصدر: | Water Science and Technology, Vol 88, Iss 7, Pp 1910-1925 (2023) |
| بيانات النشر: | IWA Publishing, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Environmental technology. Sanitary engineering |
| مصطلحات موضوعية: | optimal synthesis conditions, photocatalytic oxidation mechanism, photodegradation performance, rhodamine b, visible light-induced catalytic activity, wo3/2-dimensional ultrathin g-c3n4 composite photocatalyst, Environmental technology. Sanitary engineering, TD1-1066 |
| الوصف: | To improve the visible light-induced catalytic activities of Ultrathin g-C3N4 (UCN), a promising photocatalyst WO3/UCN (WU) was synthesized. Its visible light-driven photocatalysis performance was controllable by adjusting the theoretical mass ratio of WO3/UCN. We have calibrated the optimal preparation conditions to be: WO3/UCN ratio as 1:1, the stirring time of the UCN and sodium tungstate mixture as 9 h and the volume of concentrated hydrochloric acid as 6 mL which was poured into the mixture solution with an extra stirring time of 1.5 h. The optimal photocatalyst WUopt had porous and wrinkled configurations. Its light absorption edge was 524 nm while that of UCN was 465 nm. The band gap of WUopt was 2.13 eV, 0.3 eV less than that of UCN. Therefore, the recombination rate of photo-generated electron–hole pairs of WUopt reduced significantly. The removal rate of WUopt on RhB was 97.3%. By contrast, the removal rate of UCN was much lower (53.4%). WUopt retained a high RhB removal rate, it was 5.5% lower than the initial one after being reused for five cycles. The photodegradation mechanism was facilitated through the strong oxidation behaviors from the active free radicals ·O2-, ·OH and h+ generated by WUopt under the visible light irradiation. HIGHLIGHTS A novel visible light-induced catalyst was gained with nano-WO3 and ultrathin g-C3N4.; WO3/UCN had a low bandgap 2.13 eV and offered abundant radicals ·O2-, ·OH and ·h+.; Wrinkled, porous and ultrathin features led to a lower electron–hole recombining rate.; The removal rate of WO3/UCN on RhB reached 97.3% within 50 min while 53.4% for UCN.; The removal rate of WO3/UCN was stable and dropped by only 5.5% after reused five runs.; |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0273-1223 1996-9732 |
| Relation: | http://wst.iwaponline.com/content/88/7/1910; https://doaj.org/toc/0273-1223; https://doaj.org/toc/1996-9732 |
| DOI: | 10.2166/wst.2023.313 |
| URL الوصول: | https://doaj.org/article/307a86244e9f4204a5eaacf27c06226b |
| رقم الأكسشن: | edsdoj.307a86244e9f4204a5eaacf27c06226b |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 02731223 19969732 |
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| DOI: | 10.2166/wst.2023.313 |