Article
Environmental Sciences
Karanpal Singh, Nancy, Harpreet Kaur, Pushpender Kumar Sharma, Gurjinder Singh, Jagpreet Singh
Summary: The study synthesized undoped and Cobalt-doped zinc oxide nanoparticles (Co doped ZnO NPs) and confirmed the incorporation of the Co dopant through spectroscopic and microscopic techniques. The Co-doped ZnO NPs showed a red shift in the UV-absorption spectra and a decrease in band gap value, indicating successful integration of Co2+ ions into the ZnO matrix. The synthesized NPs exhibited excellent photocatalytic and antimicrobial activity, with 1% Co-doped ZnO showing the highest photocatalytic efficiency.
Article
Chemistry, Inorganic & Nuclear
Jiten Kumar Deuri, Puspanjali Sahu, Unnikrishnan Manju
Summary: This study investigates the influence of pressure on the crystallinity, defect density, size, and morphology of ZnO nanoparticles, synthesized using nonaqueous sol-gel method, and their respective impact on the optical properties. With the increase in pressure, a reduction in particle size was observed, reaching a minimum size at 50 bar pressure (ZnO-50). Smaller ZnO nanocrystals synthesized by the present method possess lesser number of defects, suggesting that high-pressure synthesis offers smaller ZnO nanocrystals of sub-10 nm sizes having high crystallinity and lesser defects.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Ceramics
BeiBei Zhu, Cong Chen, ZhiChao Yao, JiaYi Chen, Chuang Jia, ZheHan Wang, RuoMing Tian, Li Tao, Feng Xue, HueyHoon Hng
Summary: The addition of multiple dopants to ZnO significantly reduces its thermal conductivity and improves its thermoelectric performance, leading to a zT value 2.4 times higher than undoped ZnO. This study demonstrates that multiple doped ZnO exhibits better thermoelectric properties than singly doped counterparts, providing an effective approach to enhance the thermoelectric performance of ZnO and other oxides.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Energy & Fuels
Cafer Saka
Summary: A hybrid g-C3N4-SiO2-N composite was successfully produced using calcination and hydrothermal methods. The composite catalyst showed excellent catalytic performance in the H2 production reaction from NaBH4 methanolysis, with a high hydrogen generation rate and good durability.
Review
Crystallography
Ewelina Nowak, Edyta Chlopocka, Miroslaw Szybowicz
Summary: This paper provides an overview of the influence of various modifications on ZnO-based RRAM. It presents the motivation for creating new memory technology and explains the resistive switching mechanism, including its response to active layer and electrode selection. A comparison of ZnO devices assembled via different deposition methods is made. The manuscript also reports additional treatment of the active layer and electrodes improving the performance. Furthermore, the paper highlights the influence of different dopants on the device characteristics and reviews previous investigations of including inserting layers and nanostructures into ZnO-based RRAM.
Article
Materials Science, Ceramics
Iliana E. Medina-Ramirez, Adriana H. Marroquin-Zamudio, Jorge H. Martinez-Montelongo, Yolanda Romo-Lozano, Juan Antonio Zapien, A. Perez-Larios
Summary: Zinc oxide is a versatile nanostructured material that can be easily tuned for specific applications. In this study, ZnO-Cu2+ and Ag@ZnO-Cu2+ materials were synthesized and characterized for their enhanced antimicrobial activity and visible light activity. The results showed excellent antifungal activity and visible light activity of the prepared materials.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yu Chen, Guobiao Su, Xu Cheng, Tingting Du, Yu Han, Wenjiang Qiang, Bingxin Huang
Summary: Sodium-ion batteries have great potential in grid energy storage due to abundant sodium resources. The electrochemical performances are mainly determined by cathode materials, with P2-Na2/3Ni1/3Mn2/3O2 showing high capacity and stability when using Na2CO3 as Na source. Doping with Li and Mg can significantly improve cycle stability, but initial discharge capacity is reduced.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Anu Katiyar, Nishant Kumar, R. K. Shukla, Anchal Srivastava
Summary: This study synthesized undoped, doped, and co-doped vertically aligned zinc oxide nanorods (NRs) using a sonicated sol-gel immersion method and investigated the structural, morphological, optical, and photoconductivity properties of NRs with different dopants. The results showed that the incorporation of Fe improved the growth of NRs, while the incorporation of Ag had a detrimental effect. Co-doping enhanced the light harvesting efficiency and reduced the persistent photoconductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xiaofei Sun, Anastase Ndahimana, Zikang Wang, Xuesong Mei, Bin Liu, Guoxin Gao, Lilong Xiong, Haitao Wang, Wenjun Wang
Summary: This paper focuses on improving the electrochemical performance of Sodium Vanadium Oxyfluorophosphate (NVPFO), a high-stability, high-capacity, and high-voltage cathode material for sodium-ion batteries, by doping it with Zr4+ ions. A series of Na3V2-xZrx(PO4)2F2O compounds are prepared, and the successful doping of Zr4+ is confirmed through various characterization techniques. The optimal doping concentration of 4 at% results in Na3V1.96Zr0.04(PO4)2F2O, which exhibits a specific capacity of 128, 106, 85, and 55 mA h g-1 at different current rates. Additionally, the doped material shows improved cycling stability and a higher Na+ diffusion coefficient compared to the undoped NVPFO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Muhammad Rehan, Ara Cho, Awet Mana Amare, Kihwan Kim, Jae Ho Yun, Jun-Sik Cho, Joo Hyung Park, Jihye Gwak, Donghyeop Shin
Summary: Sodium alkali doping is an effective way to improve the performance of CZTSe devices by passivating native defects. Various methods have been considered to incorporate sodium in CZTSe films, leading to a significant increase in sodium content regardless of the incorporation method.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Nanoscience & Nanotechnology
Sakshee Chandel, Chunting Wang, Satendra Pal Singh, Nana Wang, Alok Kumar Rai
Summary: Sodium titanate is a promising anode material for sodium-ion batteries, but its low electrical conductivity restricts its electrochemical performance. By doping molybdenum, a nanostructured sodium titanate anode material was synthesized, which showed improved electrochemical performances due to enhanced electrical conductivity and increased Na+ ion diffusion rate.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
T. P. Shalvey, H. Shiel, O. S. Hutter, G. Zoppi, L. Bowen, V. R. Dhanak, J. D. Major
Summary: The study investigates the impact of sodium in CdTe solar cells and finds that deposition of NaF on the surface of CdS/CdTe devices can improve device performance, but caution is needed as high temperature treatment can lead to sodium accumulation and TeO2 layer formation.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Hassan Ahmed Rudayni, Abdelrahman M. Rabie, Malak Aladwani, Lina M. Alneghery, Gasem M. Abu-Taweel, Wail Al Zoubi, Ahmed A. Allam, Mostafa R. Abukhadra, Stefano Bellucci
Summary: Brown macroalgae were used as carriers for the synthesis of ZnO and cobalt-doped ZnO composites. The composites showed enhanced antioxidant and anti-diabetic properties due to the synergistic effects of ZnO, Co-ZnO, and BMG. The Co-ZnO/BMG composite exhibited effective scavenging properties for reactive oxygen radicals and strong inhibition of essential oxidative enzymes, making it a potential commercial anti-diabetic and antioxidant agent.
Article
Chemistry, Physical
Lichong Bai, Yanfang Sun, Lin Tang, Xiao Zhang, Jinxue Guo
Summary: The co-doping of sulfur and nitrogen into carbon nanosheets enhances sodium ion storage performance, improving the Na+ diffusion coefficient and ion storage in the carbon anode. This work deepens the understanding of the boosting effect of heteroatoms dual-doping for the sodium ion storage of carbon materials, contributing to the development of advanced heteroatom doped carbon anodes for SIBs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Pritamkumar V. Shinde, Dimple P. Dutta
Summary: This study aims to improve the electrochemical performance of tavorite-structured LiFePO4F by co-doping vanadium and sodium ions. The doped cathodes showed reduced particle size, improved reversible capacities, stable cycle performance, better rate capability, and decreased charge transfer resistance. Sodium addition proved to be beneficial for improving the charge transfer kinetics in the lithium vanadium fluorophosphate-based cathodes for lithium-ion batteries.
