Article
Chemistry, Physical
Sovandeb Sen, Sourav Maity, Susmita Kundu
Summary: In this study, reduced graphene oxide (rGO) decorated NiO-SnO2 nanocomposites were successfully synthesized and their structural, morphological, and optical properties were characterized. The incorporation of rGO increased the surface area of the nanocomposite, which was expected to improve gas sensing at room temperature. The optimized sensors showed excellent sensitivity towards acetone and selectively detected trace concentration of acetone in exhaled breath.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Guodong Li, Yanbai Shen, Sikai Zhao, Ang Li, Tingting Zhao, Chao Tang, Chenghao Yan, Shuling Gao, Zhenyu Yuan, Fanli Meng
Summary: In this work, heterojunction modulation was found to be the dominant sensitization mechanism of the rGO-SnO2-ZnO nanocomposites. The results suggest that maintaining the electrical conductivity of the backbone sensing material and avoiding any shielding effect from the decorated component are crucial in designing heterostructured gas sensing materials.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Ke Huang, Junfeng Lu, Donglin Li, Xianjia Chen, Dingfeng Jin, Hongxiao Jin
Summary: In order to improve the gas sensitivity of NO(2) room-temperature sensors based on reduced oxide graphene (rGO), ternary hybrids were synthesized by combining different contents of rGO, ZnO rods, and noble metal nanoparticles (Au or Ag NPs) to utilize the advantages of each component. The presence of rGO in the ZnO-rod/rGO hybrid facilitated the diffusion of gas molecules by preventing rGO stacking and creating a porous structure. Among the tested hybrids, Ag@ZnO rods-2% rGO and Au@ZnO rods-2% rGO exhibited better gas-sensing properties for low concentrations of NO(2), with higher response and shorter recovery time.
Article
Materials Science, Multidisciplinary
S. Zarei, M. Hasheminiasari, S. M. Masoudpanah, J. Javadpour
Summary: ZnO-xSnO(2) composite films were prepared by sol-gel spin coating process and characterized. The films showed distinct microstructure with ZnO pyramids on SnO2 nanoparticles. The ZnO-25 mol% SnO2 film exhibited higher photocatalytic degradation of methylene blue dye compared to pristine ZnO and SnO2 films.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Analytical
Sovandeb Sen, Sourav Maity, Susmita Kundu
Summary: This work presents a chemiresistive MOS-based acetone sensing device using iron doped reduced graphene oxide (rGO) decorated WO3 nanocomposites. The nanocomposites showed a maximum 78% sensing response towards 10 ppm acetone gas at a low working temperature of -130?. The sensors also exhibited excellent performance with a sensing capability for as low as 1 ppm acetone concentration and high selectivity for acetone over other interfering gases. The sensing mechanism was explained using the electron depletion model and impedance spectroscopy study.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Biochemistry & Molecular Biology
Nagamalli Arasavalli, Daisy Rani Alli, B. K. Babu, Gurrala Ravichandra, K. Sai Mokshagni
Summary: The study synthesized ZnO: SnO2 nano composite clusters through a one-step sol-gel method and increased temperature to compensate for humidity effects and improve the selectivity and performance of the gas sensor. The composite material with high mesoporous structure showed enhanced sensitivity of the gas sensor. Additionally, the composite material exhibited antimicrobial activity against certain bacteria.
INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS
(2022)
Article
Physics, Multidisciplinary
Rahul Nihal, Rahul Sharma, Mamta Sharma, J. K. Goswamy
Summary: In this study, WO3-SnO2 and Au decorated WO3-SnO2 nanocomposite were synthesized by hydrothermal method. Optical characterization revealed a reduction in band gap (Eg) from 3.56 to 3.03 eV after adding Au to WO3-SnO2, indicating improved crystallinity. FTIR spectroscopy confirmed the chemical bonding between Au and WO3-SnO2. XRD analysis showed a decrease in crystallite size from 8 to 6.7 nm with Au addition. FESEM was used to investigate the morphology, while EDS confirmed the doping of Au. The sensing properties of WO3-SnO2/Au nanocomposite for Benzene were studied, showing increased sensitivity and reduced response/recovery time with Au addition. The material exhibited high selectivity for benzene compared to other compounds.
Article
Chemistry, Multidisciplinary
Rana Ismael Faeq, Safanah Sahib Jaafar, Amel Muhson Naji, Mustafa K. A. Mohammed, Olfat A. Nief
Summary: To enhance the photocatalytic performance of rGO/PVA, ZnO nanoparticles were incorporated into the structure, forming a triple rGO/PVA/ZnO nanocomposite. XRD, FTIR, FESEM, Raman, TEM, and UV-Vis measurements were employed to analyze the synthesized materials. The results showed that rGO/PVA/ZnO had a homogeneous structure with pores and exhibited high photocatalytic performance for decomposing methylene blue under artificial sunlight illumination.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
J. Jayachandiran, J. Yesuraj, M. Arivanandhan, B. Muthuraaman, R. Jayavel, D. Nedumaran
Summary: Ultrasmall SnO2 nanoparticles synthesized by a hydrothermal method and composited with reduced graphene oxide showed excellent ozone sensing and energy storage performance.
Article
Chemistry, Analytical
Guodong Li, Yanbai Shen, Sikai Zhao, Ang Li, Cong Han, Qiang Zhao, Dezhou Wei, Zhenyu Yuan, Fanli Meng
Summary: In this study, AuxSn intermetallic compound was used for the first time as a sensitizer, significantly enhancing the H2 sensing performance of rGO-SnO2 nanocomposites. The Au/Sn molar ratio had a remarkable effect on the sensing performance, and the 3.0% AuxSn-rGO-SnO2 samples showed the optimal response and detection limit.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Mohit Verma, Gaurav Bahuguna, Arpit Saharan, Snehraj Gaur, Hossam Haick, Ritu Gupta
Summary: This study demonstrates the synthesis of metallic tin-doped Sn-SnO2 nanocomposite with high affinity towards xylene. The sensor shows a linear response to xylene in the 1-100 ppm range with a high sensitivity of 255% at 60 ppm. It is hardly affected by humidity variations and provides an effective solution for sensing indoor pollutants under humid conditions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Peng Zhang, Bin Cao, Razium A. Soomro, Ning Sun, Bin Xu
Summary: The pomegranate-like SnO2/rGO/Se spheres exhibit superior sodium storage performances by alleviating the volume variation of SnO2 and facilitating rapid electron transfer, showing promising practical applicability in sodium-ion batteries.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Biao Lei, Hongwen Zhang, Qian Zhao, Weiwei Liu, Yi Wei, Yanyan Lu, Tingting Xiao, Jinglin Kong, Weiping Cai
Summary: In this study, a sensitive ZnO/WO3 composite chemi-resistive sensor was successfully fabricated using a simple method. The sensor demonstrated simultaneous responses to multiple VOCs and showed high sensitivity and reliability. This research not only provides a simple approach for the fabrication of high-performance gas sensors, but also opens an achievable avenue for air quality assessment based on VOC concentration detection.
Article
Chemistry, Analytical
Shouli Bai, Jingyi Han, Jonathan C. Meng, Lixia Sun, Jianhua Sun, Yingying Zhao, Pinggui Tang, Ruixian Luo, Dianqing Li, Aifan Chen
Summary: The rGO-NiO/ZnO composites exhibit excellent performance in detecting NO2, attributed to the formation of a p-n heterojunction and the decoration of rGO, which enhances detection sensitivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Victor V. Petrov, Victor V. Sysoev, Aleksandra P. Starnikova, Maria G. Volkova, Zamir Kh. Kalazhokov, Viktoriya Yu. Storozhenko, Soslan A. Khubezhov, Ekaterina M. Bayan
Summary: A thin nanocomposite film composed of ZnO and SnO2 was successfully synthesized through a new solid-phase low-temperature pyrolysis method at concentrations of 0.5-5 mol.%. The film was found to have a poly-nanocrystal structure of ZnO and SnO2 crystals with characteristic grain sizes in the range of 10-15 nm. Furthermore, when comparing the chemiresistive response of the films with varied tin dioxide content, it was observed that the sample with an Sn:Zn optimal ratio of 1:99 showed a 1.5-fold improvement in response to 5-50 ppm NO2 exposure.
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)