Novel green CQDs/ZnO binary photocatalyst synthesis for efficient visible light irradiation of organic dye degradation for environmental remediation

被引:5
作者
Shalini, S. [1 ,2 ]
Sasikala, T. [2 ]
Tharani, D. [1 ,2 ]
Venkatesh, R. [3 ]
Muthulingam, S. [4 ]
机构
[1] Nehru Inst Engn & Technol, Dept Chem, Coimbatore 636005, Tamilnadu, India
[2] Sri Ramakrishna Coll Arts & Sci, Dept Chem, Coimbatore 641006, Tamil Nadu, India
[3] Sona Coll Technol, Dept Chem, Salem 636005, Tamil Nadu, India
[4] Annapoorana Engn Coll, Dept Chem, Salem 636308, Tamil Nadu, India
关键词
ZnO NPs; CQDS/ZNO; Tamarindus Indica; Ficus Benghalensis; Environmental degradation; Photocatalytic Activity; LAYERED DOUBLE HYDROXIDES; WASTE-WATER; ADSORPTION; ZN; CONVERSION; REDUCTION; FILMS;
D O I
10.1016/j.molliq.2024.125525
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The advancement of effective and sustainable water treatment depends on the creation of a highly active and controllable photocatalyst. A suitable site for increasing the activity of such a photocatalyst is the heterojunction. Organic dyes have become a major source of concern in recent years because they are so common in wastewater. Heavy metals have a high permanence in wastewater and may be carcinogenic. Low-waste, high-performance technologies are needed to remove organic dyes and heavy metals from wastewater. To determine their structural, photochemical, and optical properties, Carbon Quantum Dots (CQDs) (made from Tamarindus indica shell waste), ZnO (from Ficus Benghalensis), and CQDs/ZnO photocatalysts were synthesised using green route techniques, followed by calcination. Malachite Green (MG) and Methylene Blue (MB) are effectively photodegraded by the synthesised CQDs, ZnO, and Green CQDs/ZnO Binary Photocatalyst under the irradiation of naturally occurring solar light. The maximum photocatalytic activity for MG and MB within 60 min was shown by the Green CQDs/ZnO Binary Photocatalyst, with 100% and 100%, respectively. The reduced rate of electronhole recombination causes effective photocatalytic activity. According to experiments with free radical entrapment, O2 and h+ play an important role in photodegradation. The study thus presents a fresh approach to the synthesis of highly effective binary photocatalysts for their application in environmental remediation.
引用
收藏
页数:12
相关论文
共 50 条
[41]   Highly efficient visible photocatalytic degradation of MB organic dye by heteromorphic ZnO/AZO/ZnO nanocatalysts: effect of AZO thickness [J].
Baradaran, M. ;
Ghodsi, F. E. .
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2019, 92 (01) :25-39
[42]   Highly efficient visible photocatalytic degradation of MB organic dye by heteromorphic ZnO/AZO/ZnO nanocatalysts: effect of AZO thickness [J].
M. Baradaran ;
F. E. Ghodsi .
Journal of Sol-Gel Science and Technology, 2019, 92 :25-39
[43]   Hybrid kaolin/TiO2 composite: Effect of urea addition towards an efficient photocatalyst for dye abatement under visible light irradiation [J].
Wongso, Viona ;
Chen, Chew Jing ;
Razzaq, Abdul ;
Kamal, Norashikin Ahmad ;
Sambudi, Nonni Soraya .
APPLIED CLAY SCIENCE, 2019, 180
[44]   Synthesis and characterization of novel ZnO/NiCr2O4 nanocomposite for water purification by degradation of tetracycline and phenol under visible light irradiation [J].
Namini, Abbas Sabahi ;
Delbari, Seyed Ali ;
Mousavi, Mitra ;
Ghasemi, Jahan B. .
MATERIALS RESEARCH BULLETIN, 2021, 139
[45]   CdS-graphene nanocomposites as visible light photocatalyst for redox reactions in water: A green route for selective transformation and environmental remediation [J].
Zhang, Nan ;
Yang, Min-Quan ;
Tang, Zi-Rong ;
Xu, Yi-Jun .
JOURNAL OF CATALYSIS, 2013, 303 :60-69
[46]   A Novel Organic/Inorganic Dual Z-Scheme Photocatalyst with Visible-Light Response for Organic Pollutants Degradation [J].
Yu, Taoming ;
Wang, Doudou ;
Li, Lili ;
Song, Wenjing ;
Pang, Xuan ;
Liang, Ce ;
Mele, Giuseppe .
CATALYSTS, 2023, 13 (11)
[47]   Synthesis, characterization and investigation of photocatalytic activity of ZnMnO3/Fe3O4nanocomposite for degradation of dye Congo red under visible light irradiation [J].
Zamani, Azam ;
Sadjadi, Mirabdullah Seyed ;
Mahjoub, Alireza ;
Yousefi, Mohammad ;
Farhadyar, Nazanin .
INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY, 2020, 11 (04) :205-216
[48]   Fabrication of Fe-doped ZnO/nanocellulose nanocomposite as an efficient photocatalyst for degradation of methylene blue under visible light [J].
Farahani, Mohammad Saeed Vasheghani ;
Nikzad, Maryam ;
Ghorbani, Mohsen .
CELLULOSE, 2022, 29 (13) :7277-7299
[49]   Fabrication of highly efficient visible light driven Ag/CeO2 photocatalyst for degradation of organic pollutants [J].
Saravanakumar, K. ;
Ramjan, M. Mymoon ;
Suresh, P. ;
Muthuraj, V. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 664 :149-160
[50]   A PW12/Bi2WO6 composite photocatalyst for enhanced visible light photocatalytic degradation of organic dye pollutants [J].
Liu, Gang ;
Zhang, Yuzhuo ;
Xu, Lin ;
Xu, Bingbing ;
Li, Fengyan .
NEW JOURNAL OF CHEMISTRY, 2019, 43 (08) :3469-3475