Article
Chemistry, Physical
Wen-Feng Lai, Pei-Ling Chao, Xin-Yu Lin, Yin-Pei Chen, Jih-Hsin Liu, Tz-Feng Lin, Wei-Chou Hsu, Chia-Yi Huang
Summary: In this study, a one-dimensional protrusive TiO2 strip array was fabricated using chemical and physical methods. A porous semiconductor layer was coated on the strip array. The results showed that the DSSC with the TiO2 strip array had a higher energy conversion efficiency, which can be attributed to the large surface area of the protrusive structure and its specific electron transport paths.
Article
Physics, Multidisciplinary
Yu-Chih Chiang, Chia-Rong Lee, Chia-Yi Huang
Summary: A 90-nm-thick TiO2 grid was fabricated using photolithography, sputtering, and lift-off process. A nanoporous film was deposited on the TiO2 grid, which induced a protrusive structure. Experimental results showed that introducing the TiO2 grid into a dye-sensitized solar cell increased its power conversion efficiency by 25%. This improvement can be attributed to the large surface area and directional electron transport channels of the protrusive structure.
Article
Engineering, Electrical & Electronic
S. Rajkumar, M. R. Venkatraman, K. Suguna, P. Karuppasamy, M. Senthil Pandian, P. Ramasamy
Summary: In this study, a green synthesis approach was used to dope silver (Ag) ions onto the TiO2 lattice using grapefruit extracts as a solvent, resulting in the preparation of dye-sensitized solar cells with improved performance. The results showed that the TiO2 nanoparticles with 5% silver doping exhibited high efficiency for both natural and commercial dyes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Tamasgen Fikadu Yadeta, Toyoko Imae
Summary: The carbon quantum dot (C-dot) acts as a photosensitizer and dye-adsorber. Adding C-dot to TiO2/NiO(10 wt%) nanocomposites significantly enhances the power conversion efficiency (PCE) of dye-photosensitized solar cells (DSSCs) up to 2.88 times. However, in TiO2/CuO/C-dot nanocomposites, the addition of C-dot leads to a decrease in PCE.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Hafiz Muhammad Asif Javed, Wenxiu Que, Muhammad Shahid, Akbar Ali Qureshi, M. Afzaal, M. Salman Mustafa, Shahid Hussain, Abdullah Saad Alsubaie, Khaled H. Mahmoud, Zeinhom M. El-Bahy, Ling Bing Kong
Summary: The research investigated the effects of anodization parameters on the growth behavior and top morphology of TiO2 nanotubes. Different TiO2 nanostructures were obtained through electrochemical anodization of Ti foil by varying parameters, and dye sensitized solar cells based on TiO2 nanohexagons showed the highest power conversion efficiency. The efficiency of DSSC was further enhanced through modifications of TiO2 nanohexagons with TiO2 nanoparticles derived from TiCl4.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Sawsan A. Mahmoud, Basma S. Mohamed, H. M. Killa
Summary: Research has been conducted for over two decades on Dye-Sensitized Solar Cells (DSSCs) due to their low cost, easy preparation methodology, less toxicity, and ease of production. This study focused on the performance of DSSCs with different particle sizes, finding that TiO2 nanoparticles with smaller particle size distribution had lower conversion efficiency. Additionally, it was observed that trimodal distribution with larger size can absorb different wavelengths due to the broad distribution of the particle size.
FRONTIERS IN MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Wei-Min Tang, Chih-Chung Hu, Meng-Lin Tsai, Chung-Chen Tsao, Chun-Yao Hsu
Summary: This study focuses on the fabrication of dye-sensitized solar cells with a photoanode consisting of mesoporous TiO2 and V2O5 nanoparticles. By rinsing with acetone solution, the specific surface area and dye adsorption amount of TiO2 can be increased, leading to improved performance.
Article
Engineering, Electrical & Electronic
Nazir Mustapha, Muhammad Abdel-Shakour, Idriss Bedja, M. Abdel Rafea
Summary: The photovoltaic performance of black dye-based dye-sensitized solar cells can be improved by introducing long alkoxy group, tuning anchoring parts, and pi-spacer, which reduces dye aggregation and improves sensitizer coverage.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Suruthi Priya Nagalingam, Andrews Nirmala Grace
Summary: This study focuses on the fabrication of a poly(3,4-ethylene dioxythiophene) decorated MXene composite electrode and tests its performance as a counter electrode in dye-sensitized solar cells. The results show that the composite electrode exhibits good electrocatalytic activity and charge transfer kinetics in the iodide/triiodide electrolyte, surpassing the performance of traditional counter electrodes. The 15-day stability investigation demonstrates that the composite electrode has good corrosion resistance. Therefore, the composite electrode shows potential as a substitute for platinum.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Wenruo Fang, Pan Hu, Zhenqiu Wu, Youfeng Xiao, Yunxia Sui, Dalong Pan, Guangxu Su, Mingwei Zhu, Peng Zhan, Fanxin Liu, Wei Wu
Summary: The study demonstrates the use of collapsible gold nanofingers to construct plasmonic dye-sensitized solar cells, which can enhance light absorption and power conversion efficiency by adjusting material thickness and structure. The results show that compared to traditional film-type solar cells, this plasmonic nanostructure can significantly improve the photovoltaic conversion efficiency.
Article
Materials Science, Multidisciplinary
Fengjuan Miao, Fuchen Chu, Bingcheng Sun, Bairui Tao, Peng Zhang, Yu Zang, Paul K. Chu
Summary: This study presents the design and fabrication of a photoanode composed of Au/SnS/TiO2 sensitized with natural dye for dye-sensitized solar cells (DSSCs). By calcination, a layer of spherical nano-TiO2 is prepared, and a layer of nano-SnS is deposited on the TiO2 photoanode using the continuous ion layer adsorption reaction (SILAR). The sensitized Au nanoparticles exhibit enhanced localized surface plasmon resonance (LSPR) effects and electron trapping ability, resulting in improved electron mobility and reduced electron recombination in the DSSC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Electrical & Electronic
Pooja Prakash, N. Ruba, S. Sowmya, B. Janarthanan
Summary: This study focuses on improving the performance of dye-sensitized solar cells (DSSCs) by using natural dyes as sensitizers. The results show that Geneus Tectona grandis exhibits the highest photoconversion efficiency in ethanol, while the teak extracts demonstrate high photosensitized performance due to their sensitivity to visible light.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Coatings & Films
Philipp G. Gruetzmacher, Michael Schranz, Chia-Jui Hsu, Johannes Bernardi, Andreas Steiger-Thirsfeld, Lars Hensgen, Manel Rodriguez Ripoll, Carsten Gachot
Summary: The power conversion efficiency (PCE) of PEB and PUB as sensitizers of dye-sensitized solar cells is investigated using first-principles calculations. Different adsorption models are constructed for PEB/PUB on the TiO2 surface, and their geometrical configurations and electronic properties are optimized. The obtained PCEs confirm the credibility of the current method and predict that PUB and PEB are promising candidate sensitizers for dye-sensitized solar cells.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Environmental Sciences
Peerzada Ajaz Ahmad, Feroz Ahmad Mir
Summary: This study focuses on the performance analysis of a titanium dioxide semiconductor-based dye-sensitized solar cell (DSSC). The characteristics of the dye, including optical band gap and emission, were investigated using various spectroscopy techniques. The energy levels of the sensitizer were estimated through cyclic voltammograms. The study found that the dye performed well in terms of short circuit current density and power conversion efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Tianju Fan, Lingfeng Jian, Xinwen Huang, Shiyang Zhang, Imran Murtaza, Rehan Abid, Yidong Liu, Yonggang Min
Summary: Graphene quantum dot nanorods have been prepared as a novel carbon-based material and used to fabricate efficient photoelectrodes for dye-sensitized solar cells. The incorporation of graphene quantum dot nanorods and controllable sizes of graphene quantum dots enhances the performance of dye-sensitized solar cells and reduces cost and environmental impact.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Haixia Xie, Xingtian Yin, Yuxiao Guo, Dan Liu, Tong Liang, Gangfeng Wang, Wenxiu Que
Summary: Low temperature derived carbon electrodes were used to fabricate low cost hole transport layer free perovskite solar cells, with perovskite films annealed in glovebox and ambient air as the absorbers. Samples annealed in ambient air showed higher efficiency, good stability, and larger crystal grains compared to those annealed in glovebox.
Article
Chemistry, Physical
Jie Liu, Mingyu Hu, Zhenghong Dai, Wenxiu Que, Nitin P. Padture, Yuanyuan Zhou
Summary: Ion migration in halide perovskite materials significantly impacts various device behaviors, such as light-soaking effect, photocurrent-voltage hysteresis, and slow open-circuit voltage decay. Studies suggest that the built-in electrical field plays a key role in elucidating ion migration and associated device behaviors.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Yapeng Tian, Bowen Que, Yangyang Luo, Maomao Ju, Yi Tang, Xiaojie Lou, Zhong Chen, Wenxiu Que
Summary: In this study, amino-rich functional group modified Ti3C2Tx MXene nanosheets were synthesized successfully, which led to an enhancement in capacitive capacitance, especially in aqueous proton supercapacitors.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Xiaoqing Bin, Yapeng Tian, Yangyang Luo, Minhao Sheng, Yijia Luo, Maomao Ju, Wenxiu Que
Summary: By preparing the N-d-Ti3C2Tx/MoOx film electrode, utilizing the high conductivity of N-d-Ti3C2Tx nanosheets and the high pseudocapacitance of MoOx nanoparticles, high capacity and excellent cycling stability are achieved through the synergistic effect of the two components.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Yuxiao Guo, Xingtian Yin, Dan Liu, Jie Liu, Cong Zhang, Haixia Xie, Yawei Yang, Wenxiu Que
Summary: Photoinduced halide segregation (PIHS) is a common issue in the deterioration of mixed-halide perovskites (MHPs) under sunlight. Through continuous irradiation, CsPbI3-xBrx films go through a phase transformation from halide mixing to demixing to remixing. Migration of halide ions towards their demixing terminal follows by lattice strain exceeding leads to nanoscale cracks, supporting the strain-induced PIHS models.
ACS ENERGY LETTERS
(2021)
Review
Nanoscience & Nanotechnology
Minhao Sheng, Xiaoqing Bin, Yawei Yang, Wenxiu Que
Summary: Passive solar-driven interfacial evaporation has emerged as a rapidly growing technology for solar energy utilization and desalination. In this patent, an overview is provided on the emerging and potential applications of evaporation nanosystems beyond desalination, including electricity generation, organics rejection, and sterilization. These extended functions have the potential to address energy and environmental issues.
RECENT PATENTS ON NANOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Haixia Xie, Tong Liang, Xingtian Yin, Jie Liu, Dan Liu, Gangfeng Wang, Bowen Gao, Wenxiu Que
Summary: The mechanical stability of PEDOT:PSS transparent conductive electrode-based flexible perovskite solar cells (FPSCs) is analyzed in depth in this study. It is found that the high stress distribution within the ITO layer leads to evident cracks in the devices after cyclic bending, resulting in rapid deterioration of photovoltaic performance. Compared to the PET-ITO counterpart, the PH1000 film exhibits excellent flexibility without any cracks and an obvious increase in resistance after bending, while the MAPbI3 film shows obvious cracks and deterioration of device performance under a small bending radius.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Shoaib Iqbal, Haixia Xie, Xingtian Yin, Yuxiao Guo, Cong Zhang, Dan Liu, Boyang Wang, Bowen Gao, Wenxiu Que
Summary: This study reports a method for precise morphology control in the ambient environment for the fabrication of carbon-based, low-temperature solar cells. The method enhances carrier transportation along the vertical direction and reduces carrier recombination, resulting in improved power conversion efficiency for the cells.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Minhao Sheng, Xiaoqing Bin, Yawei Yang, Yi Tang, Wenxiu Que
Summary: This study investigates the electrocatalytic hydrogen evolution reaction (HER) activity of MAX phases and develops highly efficient MAX-derived electrocatalysts through in situ electrosynthesis.
Article
Chemistry, Multidisciplinary
Yawei Yang, Haixiang Feng, Wenxiu Que, Yu Qiu, Yunqi Li, Lin Guo, Qing Li
Summary: A scalable solar evaporator has been proposed in this study, which can operate steadily and produce freshwater under high salinity and high irradiation conditions. This evaporator exhibits high salt tolerance and evaporation rate, and is a simple, low-cost, efficient, scalable, and long-term stable device for desalination.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yi Tang, Chenhui Yang, Yangyang Xie, Yunqing Kang, Wenxiu Que, Joel Henzie, Yusuke Yamauchi
Summary: This study describes a 2D MXene-based mesoporous nanoarchitecture with ordered mesoporous carbon layers and molybdenum carbide nanodots. The mesopores increase the material's surface area, expose active sites, and improve the performance in the hydrogen evolution reaction. The structure exhibits excellent long-term stability.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Electrochemistry
Xiaoqing Bin, Minhao Sheng, Yijia Luo, Wenxiu Que
Summary: A flexible delaminated vanadium carbide MXene and molybdenum trioxide heterostructure composite film with high specific capacity and excellent electrochemical performance is fabricated. It shows great potential for supercapacitor applications.
ELECTROCHIMICA ACTA
(2023)
Article
Nanoscience & Nanotechnology
Chenji Xia, Yijia Luo, Xiaoqing Bin, Bowen Gao, Wenxiu Que
Summary: Combining two-dimensional conductive MXene with transition metal oxide is a promising approach to improve the conductivity of metal oxide materials. In this study, we synthesized a MnO2/Ti3C2Tx composite electrode using a facile hydrothermal route, which showed improved morphology, conductivity, and electrochemical performance compared to the pure MnO2 electrode. The specific capacitance of the MnO2/Ti3C2Tx composite electrode reached 210.8 F.g(-1) at a scan rate of 2 mV.s(-1), while the pure MnO2 electrode only achieved 55.2 F.g(-1). The synthesis strategy presented in this work could contribute to the development and practical application of electrode materials for supercapacitors.
Article
Nanoscience & Nanotechnology
Cong Zhang, Xingtian Yin, Gaocheng Chen, Zi Sang, Yawei Yang, Wenxiu Que
Summary: This paper reports a novel amorphous indium gallium zinc oxide/lead sulfide quantum dots (a-IGZO/PbS QDs) heterojunction photoconductor. By innovatively increasing the photocurrent by several orders of magnitude without generating additional noise, the sensitivity and responsiveness of the device have been improved. Compared with the initial pure PbS QDs-based photoconductor, the heterojunction device can increase the photocurrent by 3000 times and improve the response speed of the device with the help of interface-assisted carrier separation and recombination. In the NIR band, the device exhibits exciting performance with a detectivity of 1.53 x 10^13 Jones, a responsivity of 19070 mA/W, and a decay time of 0.39 ms. By applying the a-IGZO/PbS QDs heterojunction to paper-based devices, a flexible device with bending resistance can be obtained, and the detection performance of the device does not deteriorate after 1000 times of bending.
Article
Green & Sustainable Science & Technology
Yawei Yang, Riyao Wang, Zhongji Han, Rui Wang, Jiancheng He, Chengyu Zhang, Wenxiu Que
Summary: Semiconductor photocatalysis using TiO2 nanomaterials has shown promise in the degradation of micropollutants for environmental remediation. In this study, a scalable and refreshable photocatalytic foam was successfully fabricated by immobilizing TiO2 catalyst nanoparticles on EVA foam. The fabricated foam demonstrated excellent photocatalytic activity, stability, and refreshability for in-situ micropollutant degradation.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
