Article
Materials Science, Multidisciplinary
Jagriti Tyagi, Himanshu Gupta, L. P. Purohit
Summary: Different photoanodes were prepared on fluorine-doped tin oxide conductive glass substrate using the doctor blade method, with CdS quantum dots deposited by SILAR. The ZnO/TiO2 photoanode achieved higher efficiency compared to bare TiO2 in the QDSSC, with improved electron transport and overall performance. The IPCE for ZnO/TiO2 electrode was approximately 46%, showing enhanced capabilities for photon-to-current conversion.
Article
Chemistry, Physical
Rohit Patil, Yogesh Khollam, Aniket Kadam, Bhaurao Bond, Revati Potdar, Baliram Nadekar, Umesh T. Nakate, Shoyebmohamad F. Shiakh, Pravin S. More
Summary: This study investigates the synthesis and characterization of cadmium sulfide (CdS) and graphene oxide (GO) composite films, which show promising optical and electric properties for solar cell applications. The composite films exhibit enhanced optical properties compared to pure CdS films, indicating their potential for use in solar cell applications. The spray deposition method used in this study offers a simple and cost-effective way to prepare large-area films for practical applications.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
S. Liu, R. Fan, Y. Zhao, M. Yu, L. Li, Q. Li, B. Liang, W. Zhang
Summary: In this study, a relatively less toxic CISSe quantum dot was prepared by an organic high-temperature hot injection method for use in QD-sensitized solar cells. Through Sn doping and ZnS passivation, the electron collection efficiency was improved and charge recombination was inhibited, resulting in a power conversion efficiency of 6.7% for the QDSSC.
MATERIALS TODAY ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Junyu Wang, Yucheng Yuan, Jeremy Schneider, Weijun Zhou, Hua Zhu, Tong Cai, Ou Chen
Summary: Luminescent solar concentrators (LSCs) are wave-guiding devices that can harvest and concentrate solar light. This research presents a method using ultrasonic nebulization-assisted spray deposition to fabricate quantum dot (QD) based LSCs (QD-LSCs). The method allows for the production of high-performance QD-LSCs with different dimensions and geometries. The quality of the QD thin-film coating is relatively independent of the concentration and volume of the coating QD ink solution, enabling deliberate programming and optimization of QD-LSC devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Sunil Kumar, Ravi Prakash, Pralay Maiti
Summary: This study developed hard segment functionalized polyurethane ionomers as gel polyelectrolytes for quantum dot sensitized solar cells, achieving high photovoltaic conversion efficiency. The hole extracting capacity of the redox active group was controlled by adjusting the chemical and electronic environment. The effects of the structure of the hard segment on photovoltaic performance were thoroughly investigated, and it was found that the conductivity and thermal stability could be improved by functionalizing the polyurethane chain extenders and tuning the redox potentials. The experimental results demonstrate that high photovoltaic conversion efficiency can be achieved by selecting appropriate combinations of ionomers and hole conducting environments.
Article
Energy & Fuels
Mesut Eryigit, Soheil Mobtakeri, Eftade Pinar Gur, Elif Temur, Tuba Oznuluer Ozer, Umit Demir, Emre Gur
Summary: The simultaneous electrochemical reduction of graphene oxide (ERGO) and electrochemical formation of ZnO on conductive substrates resulted in vertically aligned ZnO nanowall structures decorated with CdS quantum dots. The performance of QDSSCs with Cu-deficient CEs displayed better device efficiency, particularly with MoS2/WS2/CuS CE combination. The cascaded CE structure along with ERGO/ZnONWs/CdS photoanode is suggested as a promising candidate for QDSSCs.
Review
Chemistry, Physical
Akash S. Rasal, Sudesh Yadav, Anil A. Kashale, Ali Altaee, Jia-Yaw Chang
Summary: This review discusses the factors influencing the performance stability of QDSSCs and provides insights into the mechanisms causing degraded performances. It also presents cutting-edge strategies for improving the overall performance stability of QDSSCs.
Article
Electrochemistry
Eftade Pinar Gur, Mesut Eryig, Uemit Demir
Summary: In this study, vertically aligned ZnO nanowalls decorated with electrochemically reduced graphene oxide (ERGO) structures were co-deposited directly on FTO substrates using a simple and one-pot electrochemical technique. These ERGO/ZnONWs were then co-sensitized with PbS and CdS quantum dots (QDs) using a successive ionic layer adsorption and reaction (SILAR) technique to fabricate ERGO/ZnONWs/PbS/CdS photoelectrodes. The photocurrent response of the ERGO/ZnONWs photoelectrodes was systematically investigated by varying the number of SILAR cycles for PbS and CdS. The PbS/CdS co-sensitized ERGO/ZnONWs photoelectrodes exhibited the best performance with high efficiency, open-circuit voltage, short-circuit current, and fill factor compared to other reported ZnO-based QDSSCs. The present study highlights the potential of the novel ERGO/ZnONWs/PbS/CdS photoanode and provides a simple and eco-friendly electrochemical technique for researchers interested in fabricating ERGO/ZnONWs for various applications.
ELECTROCHIMICA ACTA
(2023)
Article
Energy & Fuels
Wenlei Lv, Yilong Lei, Jianping Deng, Junfei Fang, Wendeng Huang
Summary: Metal ion doping is an effective method to improve the optical and electrical properties of quantum dots (QDs). In this study, Zn-doped CdS and CdSe QDs were synthesized using the SILAR method and utilized in the construction of sensitized solar cells (QDSSCs). The results showed that Zn doping significantly enhanced the power conversion efficiency (PCE) of the QDSSCs by improving the current density, open-circuit voltage, and light absorbance. The Zn doping also reduced the interfacial charge recombination rate and prolonged the electron lifetime, resulting in more efficient charge collection in the QDSSCs.
Review
Chemistry, Applied
J. H. Markna, Prashant K. Rathod
Summary: This review article provides a comprehensive overview of the efficiency of quantum dot sensitized solar cells (QDSCs) based on dye-synthesized solar cells and nanotechnology, and discusses their status under the influence of photoanode and quantum dot sensitizers.
Article
Chemistry, Physical
C. Rosiles-Perez, S. Sidhik, L. Ixtilico-Cortes, F. Robles-Montes, T. Lopez-Luke, A. E. Jimenez-Gonzalez
Summary: By using Bi2S3 quantum dots as the sensitizer material, a high short-circuit current density was achieved in the QDSSC. The addition of 1,2,3-propanetriol as a complexing agent significantly increased the density sensitization of Bi2S3 QDs, leading to an improvement in J(sc).
MATERIALS TODAY ENERGY
(2021)
Article
Polymer Science
Ravi Prakash, Santanu Das, Pralay Maiti
Summary: Functionalization of multi-walled carbon nanotubes (CNTs) was conducted to obtain CNT-tagged polyurethane (PU-CNT) through ultrasonication, chemical attachment, and chain extension. Spectroscopic techniques confirmed the functionalization of CNTs and polymer and thermal measurements revealed improved thermal stability and conductivity. Quantum dots of CuInS2 were synthesized and characterized for potential use in solar cells. Solar cell devices with Au as counter electrode achieved an enhanced power conversion efficiency of 0.81% due to reduced electron-hole pair recombination and improved hole transportation.
Article
Energy & Fuels
Roopakala Kottayi, Vignesh Murugadoss, Pratheep Panneerselvam, Ramadasse Sittaramane, Subramania Angaiah
Summary: Cu2AgInS2Se2 alloyed quantum dots were synthesized using a hot injection method, with their structure, optical properties, and composition confirmed through various analyses. The sensitized solar cell using these quantum dots exhibited higher photoconversion efficiency compared to other quantum dots, showcasing their potential for photovoltaic applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
T. Archana, S. Sreelekshmi, G. Subashini, A. Nirmala Grace, M. Arivanandhan, R. Jayavel
Summary: The study investigated the use of graphene quantum dots as a passivating layer for cadmium sulfide quantum dot-sensitized solar cells, which significantly enhanced the photoconversion efficiency of the QDSSCs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Wei Zhu, Yu-Yang Hu, Wei Wang, Yiling Xie, Weinan Xue, Fangfang He, Yan Li
Summary: In this study, a protective ZnSe shell is grown on the surface of Al/Zn coincorporated Cu-In-Se QDs to reduce surface defects and improve the photovoltaic performance of QDSCs. The ZnSe shell thickness is found to be crucial in enhancing the PL intensity of QDs and can be tailored during the synthesis process. Surface engineering of QDs with ZnSe shell leads to an increase in the power conversion efficiency of QDSCs from 10.15% to 10.53%.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiaoyang Xuan, Min Qian, Likun Pan, Ting Lu, Yang Gao, Yueping Niu, Shangqing Gong
Summary: This article introduces a flexible battery with a smart electrochromic function and designs a Ni // Zn battery with an electricity visual alerting function. The battery has a high energy density and reversible color change, allowing for visual monitoring of the battery's residual electricity.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Jiabao Li, Ziqian Li, Shaocong Tang, Tianyi Wang, Kai Wang, Likun Pan, Chengyin Wang
Summary: This study presents a novel hybrid structure consisting of sodium titanium phosphate (NTP) nanocube decorated on carbon, demonstrating excellent sodium storage performances at low temperatures. The hybrid structure, with its superionic conductor structure, flat voltage plateaus, and conductive carbonaceous framework, facilitates charge transfer, accelerates Na' diffusion, and reduces electrochemical polarization.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Liming Xu, Zibiao Ding, Yaoyu Chen, Xingtao Xu, Yong Liu, Jiabao Li, Ting Lu, Likun Pan
Summary: This study designs a carbon nanotube bridged nickel hexacyanoferrate architecture to improve the conductivity and desalination performance of metal hexacyanometalate. The HCDI cell assembled by this architecture exhibits excellent desalination performance in high salinity solutions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Hanbin Li, Jinliang Li, Liang Ma, Xinlu Zhang, Junfeng Li, Jiabao Li, Ting Lu, Likun Pan
Summary: In this study, a practical solvothermal method and in situ selenization process were utilized to obtain the VSe2-ZrO2/C/MXene composite from the MXene-MOF hybrid precursor. The composite exhibited outstanding lithium storage performance and superior cycling stability, highlighting its potential application in lithium-ion batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Inorganic & Nuclear
Liming Xu, Guodong Pan, Caiyan Yu, Jiabao Li, Zhiwei Gong, Ting Lu, Likun Pan
Summary: This study proposes and evaluates Co-doped MnO2 with abundant oxygen vacancies as the cathode material for aqueous magnesium ion hybrid supercapacitors (MHSs). The decrease in the combined valence of Mn caused by Co doping leads to more oxygen vacancies, which improves the electronic conductivity and promotes the adsorption/desorption behavior of Mg2+. Additionally, Co intercalation enhances the stability of the electrode material. An MHS based on the Co-MnO2 cathode exhibits excellent energy density and long-term cycling life.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Multidisciplinary
Ting Xiao, Yang Chen, Qi Li, Yang Gao, Likun Pan, Fuzhen Xuan
Summary: A hybrid DLP-3D printing method is developed for flexible sensor fabrication, incorporating carbon nanotube/elastomer (MWCNT/EA) as sensing units and selective electrostatic self-assembly of silver nanowires (Ag NWs) as interconnectors. The flexible sensor exhibits improved sensitivity, mechanical stability, and easy fabrication, making it suitable for structural health monitoring, human-machine interface, and soft robotics applications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Environmental
Kai Wang, Yong Liu, Xingtao Xu, Yan Jiao, Likun Pan
Summary: Faradic-based capacitive deionization (CDI) has attracted attention in the desalination community. However, it faces issues such as imbalanced ion storage capacity, low desalination rate, and poor cycling stability. This study proposes an innovative strategy using carbon nanofiber-reinforced NaTi2(PO4)3 (eCNF/NTP) and a rational rocking-chair capacitive deionization (RCDI) cell architecture. The RCDI system equipped with eCNF/NTP electrode exhibits an excellent desalination performance and cycling stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Bo Fang, Nannan He, Yue Li, Ting Lu, Peng He, Xiaohong Chen, Zhenjie Zhao, Likun Pan
Summary: In this study, carbon-wrapped Fe-doped CoS2 nanocages (C/Fe-CoS2) were synthesized and evaluated as electrocatalysts for hydrogen evolution reaction (HER). C/Fe-CoS2 exhibited superior HER performance with a benchmark current density of 10 mA cm-2 at low overpotential and remarkable stability. This research highlights the construction of high performance electrocatalysts for efficient and stable hydrogen generation through structure designing and heteroatom doping.
ELECTROCHIMICA ACTA
(2023)
Article
Nanoscience & Nanotechnology
Jiale Fang, Chengqi Chen, Hongxing Qi, Jie Zhang, Xiaoxuan Hou, Likun Pan, Xianghui Wang
Summary: Developing flexible electromagnetic interference (EMI SE) shielding materials is crucial for protecting humans from harmful radiation. We designed and fabricated a flexible multilayer structure of PVDF/GNP-PVDF composite film, which exhibited high EMI SE performance (averaging 69.7 dB in X-band), excellent flexibility, and stability (98.85% retention after bending 1000 cycles at 60 degrees). The theoretical study indicates that the multiple reflection and absorption of electromagnetic waves between layers contribute to the high EMI SE performance of the PVDF/GNP-PVDF multilayer film.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Jiaqi Yang, Jinliang Li, Yue Li, Zihui Wang, Liang Ma, Wenjie Mai, Min Xu, Likun Pan
Summary: By reasonable structural design, a spherical glucose-derived carbon-regulated defect state Zn3V3O8 bimetallic oxide (CS@ZVO) cathode was synthesized. This design prevents the structural collapse during the cycle process, leading to a significant improvement in the cycle stability of aqueous zinc-ion batteries (AZIBs). The introduction of glucose-derived carbon can shift the valence state of vanadium in the ZVO bimetallic oxide cathode towards reduction, thereby significantly improving its zinc-ion storage capacity. The resulting CS@ZVO cathode exhibits a high discharge capacity of 154 mAh g(-1) at 1 A g(-1) after 100 cycles and a stable lifespan of 2000 cycles at 5 A g(-1).
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Kun Yang, Yuchong Kang, Xuao Li, Xiaoyun Ma, Xiaoxue Wang, Zhiqiang Lu, Haibo Li, Wei Ma, Likun Pan
Summary: Graphynes (GYs) are a novel type of carbon allotrope composed of sp and sp2 hybridized carbon atoms, boasting both a planar conjugated structure akin to graphene and a pore-like configuration in three-dimensional space. Graphdiyne (GDY), the first successfully synthesized member of GYs family, has gained much interest due to its fascinating electrochemical properties including a greater theoretical capacity, high charge mobility and advanced electronic transport properties, making it a promising material for energy storage applications for lithium-ion and hydrogen storage. Various methods, including heteroatom substitution, embedding, strain, and nanomorphology control, have been employed to further enhance the energy storage performance of GDY.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Engineering, Chemical
Zeqiu Chen, Xingtao Xu, Kai Wang, Fanyue Meng, Ting Lu, Likun Pan
Summary: In this study, a dual confinement strategy was proposed to enhance the application of metal oxide nanoparticles in capacitive deionization (CDI). By combining Nb2O5 with Nb2CTx MXene and rGO, the hybrid material exhibited improved electronic conductivity and structural stability, resulting in outstanding desalination performance.
Article
Chemistry, Inorganic & Nuclear
Jiabao Li, Quan Yuan, Jingjing Hao, Ruoxing Wang, Tianyi Wang, Likun Pan, Junfeng Li, Chengyin Wang
Summary: The substitution of potassium (K) and cross-linking of multiwalled carbon nanotubes (MWCNT) can improve the sodium storage performance of the Na3V2(PO4)(3) (NVP) cathode, leading to enhanced cyclic stability and rate capability of sodium-ion batteries (SIBs), especially at low temperatures.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhibin Li, Liang Ma, Kai Han, Yingying Ji, Junpeng Xie, Likun Pan, Jinliang Li, Wenjie Mai
Summary: In this work, a potassiophilicity strategy using an oxygen-modified carbon cloth network as a host for potassium metal anodes was developed. The carbon network exhibited superior potassiophilic ability, resulting in unprecedented stability and long lifespan for potassium metal anodes. This new strategy shows great promise for metal anodes in battery applications.
Article
Engineering, Chemical
Hui Zhang, Liping Zhou, Zhonghu Dong, Yanyu Wang, Zhijun Yang, Kaiwen Chang, Chunpo Ge, Dong Liu, Haijin Liu, Likun Pan, Tianjun Ni
Summary: In this study, CoMnOx/g-C3N4 hybrid catalysts were developed by integrating CoMnOx bimetallic oxides onto a 3D porous g-C3N4 support via activated peroxymonosulfate (PMS). The catalyst achieved high degradation efficiency for antibiotics and pollutants, and the experimental and theoretical findings suggest a non-free radical catalytic mechanism that relies on 1O2 as the primary active species. This work provides a model for understanding the critical roles played by cooperative bimetallic nanoclusters in PMS activation for efficient antibiotic degradation, and presents new opportunities for designing and controlling chemical compounds for water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
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)
