Enhancing the photocatalytic activity of TiO2 nanoparticles using green Carbon quantum dots
文献类型： 外文期刊
作者： Williams, Irie Bi Irie 1 ; Fodjo, Essy Kouadio 2 ; Amadou, Kouyate 3 ; Albert, Trokourey 2 ; Kong, Cong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Key Lab East China Sea Fishery Resources Exploita, Minist Agr & Rural Affairs, Shanghai 200090, Peoples R China
2.Univ Felix Houphouet Boigny, Lab Constitut & React Matter, UFR SSMT, 22 BP 582, Abidjan 22, Cote Ivoire
3.Univ Jean Lorougnon Guede, Lab Environm Sci & Technol, BP 150, Daloa, Cote Ivoire
4.Acad Forens Sci, Shanghai Key Lab Forens Med, Shanghai 200063, Peoples R China
关键词： Carbon Quantum Dots (CQDs); Fluorescent CQDs; Methylene Blue Photocatalytic Degradation; Reduction of TiO2 Reflective Property; TiO2 Nanoparticle Synthesis
期刊名称：INTERNATIONAL JOURNAL OF NANO DIMENSION （ 影响因子：1.5； 五年影响因子：1.6 ）
ISSN： 2008-8868
年卷期： 2022 年 13 卷 2 期
页码：
收录情况： SCI
摘要： A simple and green method based on chemical fragmentation of wood charcoal is used to produce carbon quantum dots (CQDs). These CQDs are used to form a nanocomposite with synthesized titanium dioxide nanoparticles (TiO2/CQDs). The X-ray diffraction (XRD) analysis of this TiO2/CQDs nanocomposite has revealed that the presence of CQDs in these TiO2/CQDs does not affect the TiO(2)NPs crystalline structure; while the characterization using scanning electron microscopy (SEM) analysis shows a porous structure of TiO2 NPs and TiO2/CQDs resulting from the aggregation of nanoparticles with a mean size of around 25 nm and 30 nm for TiO2 NPs and TiO2/CQDs, respectively. Furthermore, a transmission electron microscopy (TEM) analysis displays particle size around 4 nm for CQDs. Besides, the reflectance study in the visible range shows that the presence of CQDs reduces the reflection of sunlight by TiO2 NPs in TiO2/CQDs nanocomposite. Moreover, compared to TiO2 NPs, TiO2/CQDs have a higher rate for methylene blue (MB) photocatalytic degradation. Indeed, an efficiency of up to 100% within ten minutes of sun exposure for the degradation of 7.5 mg/L MB can be achieved using TiO2/CQDs in opposition to thirty minutes using TiO2 NPs under the same conditions. This efficiency is obviously due to the reduction of the reflective properties of TiO2 NPs in the visible range by the presence of CQDs in the TiO2/CQDs nanocomposite. These results suggest that TiO2/CQDs could be used as heterogeneous photocatalyst for the degradation of similar compounds in water bodies under solar irradiation.
- 相关文献
作者其他论文 更多>>
-
Eco-friendly chitosan microspheres as a novel one-step sorbent for the rapid purification and determination of pesticides and veterinary drug multi-residues in aquatic products with HPLC-MS/MS
作者：Zhou, Ruidong;Wen, Yupeng;Huo, Wendi;Liu, Huan;Zhang, Chaoying;Mu, Yingchun;Li, Jincheng;Zhou, Ruidong;Wen, Yupeng;Huo, Wendi;Liu, Huan;Zhang, Chaoying;Mu, Yingchun;Li, Jincheng;Kong, Cong;Yang, Guangxin;Huang, Dongmei
关键词：Chitosan microspheres; Sorbent; Pesticides and veterinary drugs; QuEChERS; Aquatic products
-
Acute Toxicity, Bioaccumulation and Elimination Rate of Deltamethrin and Cypermethrin in Crucian Carp (Carassius auratus)
作者：Jiang, Zhongquan;Ji, Yunyun;Xie, Xinyi;Yang, Guangxin;Kong, Cong;Shen, Xiaosheng;Jiang, Zhongquan;Xing, Ruikai
关键词：deltamethrin; cypermethrin; acute toxicity; bioaccumulation; elimination; Carassius auratus
-
Arsenic toxicity in Antarctic krill oil and its impact on human intestinal cells
作者：Zhang, Haiyan;Ji, Yunyun;Jiang, Zhongquan;Yang, Guangxin;Kong, Cong;Shen, Xiaosheng;Jiang, Zhongquan;Shen, Zhemin;Yuan, Tao
关键词：Antarctic krill oil; Arsenic species; Caco-2 cells; Oxidative stress; Apoptosis
-
Utilization of wolfberry biomass waste-derived biochar as an efficient solid-phase extraction material for antibiotic detection in aquatic products
作者：Yang, Guangxin;Zhang, Junyu;Wang, Peng;Xia, Wei;Shen, Xiaosheng;Kong, Cong;Zhang, Jingru;Wang, Jun
关键词：Fluoroquinolone antibiotics; Sulfonamide antibiotics; Biochar; Solid-phase extraction; Aquatic products; Waste-derived biochar
-
Photocatalytic degradation of sulfonamide and fluoroquinolone antibiotics by Fe-N-co-doped biochar/carbon quantum dots p-n heterojunction materials
作者：Zhang, Jingru;Yang, Guangxin;Kong, Cong;Wang, Jun;Zhang, Jingru;Yang, Guangxin;Zhang, Junyu;Kong, Cong;Wang, Jun
关键词：Photocatalytic degradation; Biochar; Carbon quantum dots; Sulfonamide and fluoroquinolone antibiotics; P -n heterojunction
-
Fluorescence-Enhanced Carbon Dots/Silica Aerogel-Loaded PVA Sensor for On-site Detection of Biogenic Amines in Aquatic Products
作者：Zhang, Junyu;Zhao, Yifan;Xia, Wei;Wang, Peng;Yang, Guangxin;Shen, Xiaosheng;Fan, Chengqi;Kong, Cong;Zhang, Junyu;Gu, Lin;Xia, Wei;Yang, Guangxin;Zhao, Yifan;Nawaz, Mian Hasnain
关键词：Freshness monitoring; Carbon dots; Biogenic amines; Aquatic products; Fluorescence-visualized sensor
-
One step cleanup of 160 pesticides and veterinary drugs in aquatic products using melamine-based automatic pressure filtration purification method combined with HPLC-MS/MS
作者：Zhou, Ruidong;Kong, Cong;Yang, Guangxin;Huang, Dongmei;Zhou, Ruidong;Wen, Yupeng;Huo, Wendi;Zhang, Chaoying;Sun, Huiwu;Liu, Huan;Li, Jincheng;Zhou, Ruidong;Wen, Yupeng;Huo, Wendi;Zhang, Chaoying;Sun, Huiwu;Liu, Huan;Li, Jincheng;Zhou, Ruidong;Wen, Yupeng;Huo, Wendi
关键词：Aquatic products; Pressure filtration cleanup column; Melamine sponge sorbent; Pesticides and veterinary drugs; Quantitative analysis; Health risk assessment
