Article
Materials Science, Multidisciplinary
Syed Jazib Abbas Zaidi, Summal Zoha, Muneeb Ahmad, Muhammad Shahid, Tae Joo Park, Muhammad Abdul Basit
Summary: In this study, Ag2S quantum dot-sensitized ZnO nanoflowers were developed using a simple and efficient p-SILAR method, which showed improved photocatalytic degradation rate and antibacterial effect.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Allyn Pramudya Sulaeman, Rifky Adhia Pratama, Uji Pratomo, Irkham, Avtar S. Matharu, Indah Primadona
Summary: By sensitizing ZnO nanopencils with sulfur and nitrogen co-doped graphene quantum dots (S,N-GQDs), the photo absorption range of ZnO nanopencils can be expanded to the visible light spectrum, and the light harvesting efficiency can be significantly improved. The results indicate that ZnO NPc/S,N-GQDs shows remarkable improvement in photoelectrochemical activity under visible light irradiation.
Article
Chemistry, Multidisciplinary
Faxing Liu, Quanjun Xiang, Xigui Zhang, Haiping Zhou
Summary: In this study, Ni cocatalysts on a TiO2 composite photocatalyst with different graphene oxide (GO) contents were prepared using a hydrothermal method and characterized. It was found that the TiO2/GO/Ni nanosheet composites have a large specific surface area and can provide a large number of active sites for photocatalytic hydrogen production. GO can broaden the optical absorption range of TiO2 and absorb more visible light, stimulating the generation of more electron-hole pairs. Additionally, GO can collect electrons and promote the separation of electron-hole pairs. Ni, as a cocatalyst, can adsorb hydrogen ions and facilitate the migration of photogenerated electrons, thus ensuring high efficiency of the photocatalytic reaction.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Huanhuan Xu, Peizhi Fan, Lan Xu
Summary: In this study, CuO/ZnO/carbon quantum dots (CQDs)@PAN nanocomposites with ternary heterostructures (CZC@PAN) were prepared and their application in degrading methylene blue (MB) was investigated. The synergistic effects of components in ternary heterostructures on the morphology, structure, and photocatalytic performance of CZC@PAN were analyzed, and their photocatalytic mechanism was discussed. The results showed that CZC@PAN exhibited excellent photocatalytic degradation performance, with a degradation rate of 99.56% for MB under natural sunlight for 4 hours.
Article
Chemistry, Multidisciplinary
Fengliang Wang, Tingting Hou, Xin Zhao, Wen Yao, Ruiqi Fang, Kui Shen, Yingwei Li
Summary: Solar-driven photocatalytic CO2 reduction is a promising approach for addressing the energy crisis and CO2 pollution. A newly developed photocatalyst shows high efficiency in CO2 reduction and introduces an amines oxidation reaction to further enhance the process.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Sumathi Subramanian, Sasikala Ganapathy, Suguna Subramanian, Ayyaswamy Arivarasan
Summary: A one-step approach is developed for the decoration of CdTe QDs onto the surface of GO nanosheets/integration of QDs into GO nanosheets through self-assembly, forming sandwiched hybrid heterojunctions. Interlinking QDs and GO nanosheets improves photocurrent generation (~5.8 μA cm-2) and enhances electron transfer by prolonging decay time (58.25 ms). The obtained higher rate constant value (k = 0.135 min-1) enables the degradation of 93% MB dye in 20 min. This work demonstrates a cost-effective strategy for constructing CdTe QDs/GO nanosheet hybrid heterojunctions with potential application in photocatalysis.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Jinglin Li, Hao Yuan, Jiaxin Li, Wenjie Zhang, Yanqi Liu, Na Liu, Haijie Cao, Zhengbo Jiao
Summary: Chemically bonded BiVO4/ZnO quantum dot heterostructures were fabricated using a simple solution dry-out method, forming chemically bonded interfaces (CBIs) that promote photoexcited electron transfer and serve as hole-blocking layers. The CBIs showed excellent performance in both UV and visible light regions, leading to significantly increased photocurrent density in BiVO4/ZnO QDs without a cocatalyst. Additionally, ethylene glycol was found to partially reduce Bi ions to elemental bismuth during the calcination process, contributing to improved water oxidation kinetics.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Heng Zhao, Jing Liu, Chao-Fan Li, Xu Zhang, Yu Li, Zhi-Yi Hu, Bei Li, Zhangxin Chen, Jinguang Hu, Bao-Lian Su
Summary: In this study, a hierarchically two-dimensional (2D) meso-microporous perovskite nanosheet-constructed 3DOM CaTiO3 photocatalyst is designed and fabricated to significantly reduce the grain boundaries and enhance photocatalytic activity for hydrogen generation. The use of carbon quantum dots as a metal-free co-catalyst results in outstanding hydrogen generation performance under monochromatic light.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Dhritiman Banerjee, Asit Kumar Kar
Summary: This research reports a new strategy for achieving high carrier recombination and high photocatalytic efficiency simultaneously by incorporating interface states in ZnO quantum dots. SiO2 encapsulated ZnO quantum dots (ZnO@SiO2 QDs) were prepared using TEOS and zinc acetate as precursors. The formation of interface states due to Zn-O-Si bonds between the SiO2 matrix and ZnO quantum dots was confirmed by XPS, FTIR, and negative photoconductivity tests. ZnO@SiO2 QDs exhibited remarkable photocatalytic dye degradation properties, outperforming uncoated and commercially available ZnO, with a high quantum yield ranging from 46.1% to 56.4%.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Mamta Devi Sharma, Mrinmoyee Basu
Summary: Photoelectrochemical water splitting is a greener method for hydrogen production, but developing suitable semiconductor materials for practical applications is a challenge. This study investigates CdIn(2.2)Sy (CIS) as a visible-light-active semiconductor photoanode and enhances its efficiency and stability by decorating it with S and N codoped C-dots (S, N-CDs). The results show that this design improves photocurrent density and photoconversion efficiency while maintaining stability under continuous back illumination.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Linjer Chen, Chiu-Wen Chen, Cheng-Di Dong
Summary: This study demonstrates the superior photocatalytic performance of MoSSe quantum dots in degrading organic pollutants, showing enhanced catalytic activity, with superoxide radicals and photo-induced holes as primary reactive species, attributed to the high specific surface area and efficient separation of photo-induced electron and hole pairs.
Article
Chemistry, Analytical
Dongquan Leng, Jihao Zhao, Xiang Ren, Rui Xu, Lei Liu, Xuejing Liu, Yuyang Li, Qin Wei
Summary: In this study, a split-type immunoassay strategy initiated by cation exchange and altering the capacity of an electron donor was optimized, using MoSe2/CdSe as a photoelectrode substrate and silver ions as the initiator of CE. The combination of ascorbate oxidase with MSNs improved the sensor's sensitivity and reliability, resulting in a broad linear range and low detection limit when applied to neuron-specific enolase.
ANALYTICAL CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Ziliang Chen, Yang Liu, Zhenhui Kang
Summary: Carbon dots (CDs) are a new type of carbon-based functional material that have attracted much interest due to their tunable structure and composition, as well as their rich photoelectrochemical properties. They show great potential in various applications such as biology, catalysis, sensors, and energy storage. However, the understanding of CDs is still limited due to their inherent complexity, which requires expertise from organic chemistry, materials science, and solid state physics. Discovering appealing properties, elucidating fundamental factors that affect the properties, and proposing effective engineering strategies are highly pursued by researchers. This Account provides an introduction to the features and properties of CDs, as well as discussing analysis techniques and regulation strategies for tailored applications. The challenges and future directions in CD research are also discussed.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Energy & Fuels
Smruti Purohit, Sanjib Shyamal, Saurabh K. Saini, Kanhaiya L. Yadav, Mahesh Kumar, Soumitra Satapathi
Summary: Photocatalytic reduction of CO2 is a promising strategy, and this work develops a Cs2AgBiBr6 double-perovskite nanocrystal encapsulated by aTiO2, which can achieve efficient and selective reduction of CO2 to CH4 and CO.
Article
Chemistry, Physical
Abinash Das, Dongyu Liu, Riu Riu Wary, Andrey S. Vasenko, Oleg Prezhdo, Ranjith G. Nair
Summary: Doped ZnO nanostructures, particularly Mg(3)-ZnO, exhibit superior photocatalytic dye removal and photoelectrochemical water splitting performance compared to pristine ZnO. The optimal Mg-ZnO shows an 8-fold increase in photocatalytic activity and a photocurrent response 11 times higher than pristine ZnO. Tuning the Mg content enhances the generation of charge carriers and reduces recombination rate, thereby improving the overall performance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
