Article
Chemistry, Analytical
Jiongjiang Liu, Yuanyuan Liu, Hongda Liu, Qingjiang Pan, Guo Zhang
Summary: In this paper, In2O3/g-C3N4/rGO nanocomposites as a novel high-performance NOx gas sensor are successfully prepared by the solvothermal method. The gas sensing performance of In2O3/g-C3N4/rGO towards NOx is significantly enhanced, with a response (2040) to 100 ppm NOx about seven times more than In2O3/g-C3N4. Meanwhile, In2O3/g-C3N4/rGO has a faster reaction/recovery time (96/52 s) than In2O3/g-C3N4 and exhibits good selectivity, reproducibility, and low detection limits. The adsorption process of NOx on the surface of In2O3/g-C3N4/rGO is studied by Diffuse Reflectance Infrared Fourier Transformed (DRIFT). The gas-sensitive properties of In2O3/g-C3N4/rGO are enhanced due to the heterogeneous structure formed among the MOF-derived In2O3 nanotubes, g-C3N4, and rGO nanosheets and their large specific surface area. The good electron mobility of rGO, the sensitizing effect of g-C3N4, and the unique structure of MOF-derived In2O3 are also advantageous for enhancing gas sensing performance. Therefore, In2O3/g-C3N4/rGO ternary nanocomposites are excellent candidates for NOx gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Yuting Wang, Tianqi Wang, Hong Shao, Feng Li, Dan Li, Ying Yang, Hui Yu, Xiangting Dong
Summary: In this study, Cu2ZnSnS4/polyoxometalate (CZTS/PW12) nanofibers were synthesized by electrospinning, and the sensing performance of 1D CZTS in gas sensors was investigated for the first time. It was found that CZTS/3%PW12 exhibited the highest response value (2.1) compared to all previously studied CZTS-based sensors. The 1D nanofiber structure allowed for orderly carrier movement, and the PW12 electron acceptor reduced electron-hole recombination. This work expands the possibilities for improving the performance of CZTS-based gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Green & Sustainable Science & Technology
Wenqing Wang, Jinfang Tan, Shuangchi Li, Yuntao Guan, Xiaohui Zhang, Ning Wang, Jingna Liu, Xiaoqian Jiang
Summary: Organic fertilizers have been overused, increasing the risk of phosphorous loss in river systems. This study explores the use of environmentally friendly Mg-Al layered double hydroxides (LDHs) to reduce phytate loss from soil and improve its sustainable utilization. The findings suggest that adding LDHs or Ca2+ increases phytate retention in soil, while increasing KCl ionic strength reduces phytate retention. Additionally, the injection of phytate leads to the release of organic substances and the dissolution of LDHs.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Analytical
Prashant Shukla, Pooja Saxena, Vasuda Bhatia, V. K. Jain
Summary: The sensor device developed using electrostatically functionalized self-assembled MWCNTs can selectively sense toxic gases such as CO and NOx with high sensitivity and repeatability, down to sub-ppm levels.
ANALYTICA CHIMICA ACTA
(2021)
Article
Engineering, Electrical & Electronic
Seyed Amirabbas Zakaria, Seyyed Hamid Ahmadi, Mohammad Hassan Amini
Summary: This article discusses the application of LDH nanosheets in gas sensors and their synthesis methods, explores the properties of LDH nanosheets and their impact on pollutant detection.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Baihe Sun, Fangjie Qin, Lin Jiang, Jun Gao, Zhuo Liu, Jue Wang, Yang Zhang, Jiahui Fan, Kan Kan, Keying Shi
Summary: A novel NOx gas sensor candidate Co3O4/Al2O3@Ti3C2T MXene was successfully synthesized using a self-sacrificial template and hydrothermal method, showing enhanced response, low detection limit, excellent repeatability and selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Coatings & Films
Zhifei Zhang, Yang Bai, Yi He, Hongjie Li, Teng He, Ruxia Song, Yahui He, Jinxue Song, Bo Liu
Summary: Ni-Fe-P/Mg-Al layered double hydroxide (LDH) composite coatings with high corrosion and wear resistance were prepared. The uniform distribution of Mg-Al LDH nanosheets in the composite coating enhanced the wear resistance of the Ni-Fe-P matrix.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Huiling Liu, Hailiu He, Liqiang Chen, Qingjiang Pan, Guo Zhang
Summary: Flower-like Co3O4 microspheres composed of thin nanosheets were successfully synthesized, showing high gas sensitivity with a response of 72.3% to 100 ppm NOx and a detection limit lower than 70 ppb. The outstanding performance can be attributed to its unique structure and surface oxygen vacancies.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Huanzhu Guang, Jiongjiang Liu, Guo Zhang
Summary: A Ga-doped MOF-derived Co3O4 nanocomposite material was synthesized for the first time, and its chemical composition, structure, and gas-sensitive performance were investigated. The Ga-doped Co3O4 showed a sensitivity of about 52.6% to 100 ppm NOx at room temperature, which is about 5 times higher than pure Co3O4 (10.3%). Additionally, the Ga-doped Co3O4 demonstrated good selectivity and cyclic stability. The enhanced gas sensing performance of Ga-doped Co3O4 is attributed to the increase in oxygen vacancy content and the synergistic effect of the p-n heterojunction. This study provides a promising gas-sensing material for the detection of NOx pollution.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Analytical
Yuxiang Qin, Haiyang Gui, Yinan Bai, Sicheng Liu
Summary: LDHs are attracting attention in gas sensor field due to high specific surface and modifiability, but restacking and poor conductivity hinder performance. By constructing LDHs/Ti3C2Tx nanocomposite, conductivity and adsorption sites are improved, resulting in enhanced sensitivity to rarefied gas. The new gas sensor shows significant enhancement in response value to NH3 at room temperature, with fast response time, high selectivity and long-term stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Bayu Wiyantoko, Puji Kurniawati, Tri Esti Purbaningtias, Muhammad Husnu Jauhari, Amri Yahya, Muchammad Tamyiz, Is Fatimah, Ruey-an Doong
Summary: The present study aimed to prepare and characterize calcined Mg/Al layer double hydroxides (LDHs) for the adsorption of methyl orange in a batch system. The results showed that calcined LDHs were efficient adsorbents for the remediation of methyl orange at relatively high concentrations.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Analytical
Soumaya Jaballah, Yazeed Alaskar, Ibrahim AlShunaifi, Imed Ghiloufi, Giovanni Neri, Chaker Bouzidi, Hassen Dahman, Lassaad El Mir
Summary: The study aims to enhance the gas sensing capability of ZnO based sensors through investigating the effect of Al and Mg doping. Experimental results show that Al and Mg have a significant impact on the sensing performances towards H-2 and CO gases. The sensor based on 5A1MZO exhibits high sensitivity and low detection limits to H-2 and CO.
Article
Chemistry, Multidisciplinary
Samar Yusuf, Ahmad Moheb, Mohammad Dinari
Summary: Nitrate-intercalated Mg/Cu/Al-layered double hydroxides (LDHs) were synthesized successfully by co-precipitation method under ultrasonic irradiation, and characterized by various analyses. The CuMg32Al-NO3- catalyst showed the best catalytic activity under mild reaction conditions, with a conversion of 27%, selectivity of 92.05% for catechol and hydroquinone, and CAT/HQ ratio of 1.5.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Electrochemistry
Michele Fedel, Caterina Zanella, Luca Ferrari, Flavio Deflorian
Summary: Novel LDHs coatings developed in-situ on aluminum alloys, particularly MgAl LDHs layers, have shown improved corrosion protection on AA500 substrate, especially in terms of filiform corrosion resistance. The effectiveness of different synthesis conditions in enhancing FFC resistance has been demonstrated through the formation of well-defined crystals.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Ceramics
Yu An, Tian-yang Wang, Tian -tian Li, Hua Yang, Hui Yu, Long Xia, Xiao-xiao Huang
Summary: In recent years, environmental pollution and industrial accidents caused by the leakage of harmful gas are increasing, and advanced gas sensors have been considered as one of the main strategies for environmental monitoring and industrial safety control. In this study, a Cr2O3@SnO2 composite was synthesized as an effective gas sensor for NOx gas, showing high response and low detection levels.
CERAMICS INTERNATIONAL
(2022)
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)