Article
Electrochemistry
Ruihong Guo, Yujuan Zhang, Xiutang Zhang, Mingming Ma, Tuoping Hu
Summary: In this study, Co-based nanoparticles anchored on nitrogen-doped carbon substrates were successfully synthesized for hydrazine oxidation reaction. The optimal CoO/Co3O4@N-C-600 composite showed excellent activity and durability, surpassing the performance of commercial Pt/C catalyst. The heterojunction structure and mesoporous feature of the composite facilitated the adsorption and dehydrogenation of N2H4 and improved electrolyte penetration. Moreover, the assembled electrolyzer utilizing CoO/Co3O4@N-C-600||Pt/C exhibited lower voltage requirements for hydrazine-assisted hydrogen production, indicating higher energy-saving efficiency.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Viplove Mishra, Athma E. Praveen, Ayan Mondal, Venkataramanan Mahalingam
Summary: This study presents the fabrication of a Co3O4/CoS2 heterostructure for overall hydrazine-assisted water splitting using a facile and low-temperature hydrothermal technique. The structural analyses confirm the coexistence of Co3O4 and CoS2 phases with a significant interfacial interaction. The developed heterostructure exhibits superior electrochemical HzOR performance compared to individual Co3O4 and CoS2 phases.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Xuewei Dong, Dongchao Wang, Zhongyu Qiu, Jiaping Xuan, Naibao Huang
Summary: The S-modified Co3O4@S-g-C3N4/C catalyst with core-shell structure exhibited higher catalytic activity and durability for oxygen reduction reaction in fuel cells compared to Co3O4@g-C3N4/C and Co3O4/C catalysts.
Article
Electrochemistry
Om Prakash Bajpai, Zakaria El Koura, Ilaria Pucher, Michele Orlandi, Antonio Miotello
Summary: In this work, commercial porous carbon electrodes were modified by in situ synthesized g-C3N4, which demonstrated improved performance in water splitting configuration by reducing overpotentials. It was also found that the modification did not increase the surface-to-volume ratio of the electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Shuhang Chen, Wentao Wang, Ying Hou, Yachao Hao, Yangcan Zhao, Siyan Wang, Jianfang Meng, Hongyan Xu
Summary: Co3O4 nanosheet/g-C3N4 hybrids, with the optimized hybrid of 20 wt % g-C3N4 (20-CNCo) displaying the best photocatalytic performances for H-2 evolution, with an average H-2 evolution rate of 134.6 mu mol center dot g(-1)center dot h(-1). The enhanced photocatalytic H-2 evolution activities of 20-CNCo were attributed to the formation of heterojunctions between Co3O4 nanosheets and g-C3N4, increasing optical absorption ability, promoting charge separation, accelerating electron transfer, and prolonging excited electrons' lifetime. The unique S-scheme charge transfer mechanism retained strong redox ability, contributing to H-2 evolution. This work provides strategies for designing active catalysts for photocatalytic reactions.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mengru Ding, Yuanduo Qu, Xueyu Zhang, Lianfeng Duan, Xuesong Li, Wei Lu
Summary: The study proposed a design of fiber electrodes decorated by acidified carbon fibers via a facile hydrothermal method. All-solid-state wire-shaped supercapacitors were fabricated based on this design, achieving a specific area capacitance of 61 mF cm(-2) with 90% capacitance maintained after 5000 cycles.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Analytical
Cuiyuan Liang, Huiming Lin, Wei Guo, Xing Lu, Dexin Yu, Songjie Fan, Feng Zhang, Fengyu Qu
Summary: A novel ZIF/g-C3N4/RGO nanohybrid was created for the first time as an electrochemical sensor, exhibiting excellent electrocatalytic activity towards hydrazine with a low detection limit and high sensitivity. The detection concentration of hydrazine in actual samples was lower than the WHO limit and showed high reproducibility. The high sensing capability of ZIF/g-C3N4/RGO combines abundant surface-active sites, high conductivity, and 2D interfaces between the nanosheets, providing a promising avenue for improving sensing performance.
Review
Chemistry, Multidisciplinary
Xuejun Xu, Yisheng Xu, Yaoheng Liang, Hangyu Long, Dongchu Chen, Huawen Hu, Jian Zhen Ou
Summary: This article provides a critical overview and perspective on the recent development of g-C3N4 photocatalysts modified by carbon and nitrogen vacancies, or both, and their implementation in various photocatalytic applications. It discusses the methods for identifying and altering the structural properties of g-C3N4, as well as strategies for manipulating its microstructure and properties. Based on vacancy modification and other structural tuning aspects, the article analyzes the corresponding photocatalytic performance of g-C3N4 and presents current challenges and future research suggestions.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Chechia Hu, Miao-Ting Liu, Arisu Sakai, Masaaki Yoshida, Kun-Yi Andrew Lin, Chun-Chieh Huang
Summary: This study presents a bimetallic catalyst of Cu and Ru decorated on a g-C3N4 surface for efficient electrocatalytic CO2 reduction. The CuO/Cu2O and RuO2 species on the catalyst surface play crucial roles in adsorption and activation of CO2, leading to enhanced current density and stability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Hui Cao, Yumeng Yan, Yuan Wang, Fei-Fei Chen, Yan Yu
Summary: This study utilizes active site and heterojunction engineering to enhance photocatalytic CO2 reduction (PCR). The results show that the g-C3N4 microtube-supported Co3O4 nanoparticle achieves a significantly high turnover number (TON) in PCR, 24-fold higher than that of pure Co3O4 and comparable to state-of-the-art photocatalysts.
Article
Engineering, Electrical & Electronic
Monireh Nazari, Hamideh Asadollahzadeh, Mehdi Shahidi, Nahid Rastakhiz, Sayed Zia Mohammadi
Summary: A non-enzymatic electrochemical sensor using La2O3-Co3O4 nanocomposite and ionic liquid on a modified carbon paste electrode was developed for sensitive quantification of hydrazine. The sensor exhibited good voltammetric responses with a wide linear range and low detection limit. The novel platform showed promising results for electrochemical detection of hydrazine in water samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Analytical
Hongxia Zhang, Xiaoli Liu, Mengmeng Xu, Jianbin Zheng
Summary: The Au-modified hollow ZnSnO3 cubes were successfully fabricated and used to develop an electrochemical sensor for hydrazine detection, showing high sensitivity, a wide linear range, and low detection limit. The proposed sensor exhibited improved performance compared to other sensors, providing insights for constructing novel sensors.
MICROCHEMICAL JOURNAL
(2022)
Article
Energy & Fuels
Dujuan Li, Xiaoli Ma, Peng Su, Zhibo Jiang, Zhiliang Jin
Summary: In this study, Co3O4 materials with a hollow double-shell structure were obtained by using the imidazolium salt zeolite framework (ZIFs) as the substrate. The composite catalyst CNCO-x (x = 1, 2, 2, 3, 4, and 5) improved the catalytic performance of g-C3N4 by introducing Co3O4 and forming a charge transfer bridge channel.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Zhengdong Xu, Junbo Zhong, Jiufu Chen, Minjiao Li, Lei Zeng, Hao Yang
Summary: This study successfully constructed S-scheme Co3O4/PCN heterojunctions with favorable photoelectric effect, which showed higher H2 evolution performance than single Co3O4 and PCN. The construction of these heterojunctions elevates active sites induced by N-deficient formation, leading to improved photocatalytic activity.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Yelin Dai, Ziyi Feng, Kang Zhong, Jianfeng Tian, Guanyu Wu, Qing Liu, Zhaolong Wang, Yingjie Hua, Jinyuan Liu, Hui Xu, Xingwang Zhu
Summary: Water pollution is a serious issue that poses threats to human health. The use of solar energy for photocatalytic degradation of organic pollutants in water has a promising future. In this study, a novel Co3O4/g-C3N4 type-II heterojunction material was prepared and utilized for the efficient photocatalytic degradation of rhodamine B (RhB) in water. The incorporation of type-II heterojunction structure facilitated the separation and transfer of photogenerated electrons and holes, leading to a degradation rate 5.8 times higher than that of pure g-C3N4. The main active species were identified as center dot O-2(-) and h(+) through radical capturing experiments and ESR spectra. This work provides possible routes for exploring catalysts with potential for photocatalytic applications.
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)