Article
Nanoscience & Nanotechnology
Jun Li, Xin-Gui Tang, Qiu-Xiang Liu, Yan-Ping Jiang, Wen-Hua Li
Summary: This study successfully fabricated TiO2-SrTiO3 composite oxide thin films via sol-gel method and investigated their crystal phase, surface morphology, and chemical compositions through various characterizations. The results show that the composite oxide exhibits enhanced photoelectric properties, with the photoluminescence spectrum closely related to charge carrier trapping information. Additionally, first-principle calculations based on DFT provided insights into the energy band and state density of the composite oxide, deepening understanding of its photoelectric properties and electron structure for potential optoelectronic device applications.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Materials Science, Ceramics
A. P. Zavjalov, G. A. Lyubas, M. R. Sharafutdinov, I. A. Tarasov, A. A. Belov, O. O. Shichalin, E. K. Papynov, V. V. Kriventsov, D. Yu. Kosyanov
Summary: This paper presents the results of preparing biphase SrTiO3-TiO2 ceramics as a promising system for n-type thermoelectrics using the features of a two-dimensional electron gas. The dynamics of phase transformations are explored, and it is clarified that phase transformations are not the driving force of sintering. The mutual stabilization of the SrTiO3 and TiO2 phases is demonstrated. The role of the two-dimensional electron gas is found to modulate the properties of bulk phases. Clear signs of size quantization were detected by the X-ray luminescence method.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Katarzyna Kolodziejak, Jaroslaw Sar, Konrad Wysmulek, Krzysztof Orlinski, Piotr Piotrowski, Michal Gajewski, Dorota Anna Pawlak
Summary: The idea of using sunlight for various chemical reactions or generating electrical current is extensively researched. This study presents a method for testing the stability of photoanodes using a SrTiO3-TiO2 composite as an example. The results show that the photocurrent density increased almost four times after stability cycles, although the surface roughness of the photoanode increased and the reflectance decreased.
Article
Chemistry, Physical
Lei Lu, Yunlong Xu, Lixin Que, Jun Cao, Jingjing Wang, Yingying Zheng, Lei Shi, Wenwu Zhong, Chaorong Li, Jiaqi Pan
Summary: A transparent Cu2O/ZIS-3-TiO2 pn junction with high transmittance and significant enhancement in photovoltaic conversion efficiency has been prepared. This is achieved by using Zn3In2S6 quantum dots with appropriate Fermi level, high quantum yields, and wide band gap, as well as orderly TiO2 nanoarrays providing carrier transportation pathway.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Reece T. T. Lawrence, Mark P. P. Croxall, Cheng Lu, M. Cynthia Goh
Summary: A series of TiO2-NGQD composite photocatalysts were synthesized and showed increased photocurrent generation and photocatalytic degradation of phenol under full spectrum and visible only illumination. The composites could switch from anodic to cathodic photocurrent by changing the light source. The prepared composites outperformed the commercial standard P25 TiO2, with the 8 wt% NGQD composite showing a visible improvement of over 600% compared to P25. TiO2-NGQDs have significant potential in photocatalysis, energy harvesting, and water splitting.
Article
Chemistry, Physical
Yong Liu, Manwen Yao, Xi Yao
Summary: Dielectric Sr0.88Bi0.08TiO3 (SBT) and Sr0.88Bi0.08TiO3/TiO2 (SBT/TiO) thin films were fabricated through sol-gel and spin-coating methods at different annealing temperatures. The results show that adding a TiO2 layer allows SBT thin films to crystallize at lower temperatures, affecting surface morphology. Absorbed water content is reduced at higher temperatures, impacting breakdown strength, while finite element simulation highlights the role of an aluminum oxide insulating layer in enhancing dielectric breakdown strength. SBT/TiO films annealed at 450°C exhibit superior energy storage performance compared to SBT thin films, suggesting a promising strategy for developing high-performance dielectric capacitor devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
T. Lurthu Pushparaj, E. Fantin Irudaya Raj, E. Francy Irudaya Rani, S. Darwin
Summary: A new photo-converting layer containing luminescent hybrid metal-composite-doped polyvinyl alcohol polymer has been developed. By mixing specific complexes and semiconductors, the composite-doped PVA layer absorbs a wide range of UV-visible light and significantly increases the PV effect of a low-voltage solar panel. The research opens possibilities for developing low-cost, long-lasting, high-volt solar panels for industrial applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Sergio Diaz-Abad, Manuel A. Rodrigo, Cristina Saez, Justo Lobato
Summary: This study reports the use of TiO2-based composite polybenzimidazole membranes for hydrogen production through SO2 depolarized electrolysis, showing improved proton conductivity, chemical stability and crossover inhibition compared to the standard PBI membrane.
Article
Engineering, Electrical & Electronic
Yan-Ping Jiang, He-Chun Zhou, Xin-Gui Tang, Wen-Hua Li, Xiao-Bin Guo, Zhen-Hua Tang, Qiu-Xiang Liu
Summary: In this study, Bi4Ti3O12(BIT)/TiO2 composite films were successfully prepared on indium tin oxide (ITO) using the sol-gel method. The films were characterized for microstructures, physical properties, and photoelectric response. It was observed that the BIT/TiO2 films exhibited better photoelectric properties compared to pure BIT and TiO2 films. The enhancement in photovoltaic performance was explained by the change in energy band of the heterojunction. Furthermore, the effects of external bias and polarization operation on the photoelectric characteristics of the composite films were explored. It was found that positive voltage increased the photoelectric response while negative voltage decreased it. Negative polarization operation significantly improved the photoelectric performance, whereas positive polarization operation not only reduced the photocurrent but also reversed its direction.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Maximilian Kissel, Lukas Porz, Till Froemling, Atsutomo Nakamura, Juergen Roedel, Marin Alexe
Summary: This study reveals that dislocations in oxide semiconductors can enhance the photoconductivity and result in different global photoconductivity behavior. Additionally, indications for a bulk photovoltaic effect enabled by dislocation-surrounding strain fields are observed for the first time.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Shuo Zhang, Hangxi Liu, Feixue Gao, Ming Fang, Yifeng Zhang, Yawen Cai, Kexin Li, Mingguang Kong, Xiaoli Tan
Summary: Piezo catalysis with K2Ti6O13/TiO2 has been shown to be effective in degrading tetracycline, with factors such as pH, anions/cations competition, ultrasonic power, frequency, and temperature being studied. The use of free radical sacrificial agents helped understand the degradation mechanism, highlighting the role of holes and O-2(-) in the process. The combination of K2Ti6O13 and TiO2 enhances electron-hole separation, improving piezo catalytic performance for potential environmental treatment applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Yuanyuan Wang, Li Yin, Jie Wu, Nan Li, Na He, Haixin Zhao, Qiang Wu, Xiaotian Li
Summary: The study reports a new strategy of sensor design by in situ transformation of perovskite and combining with bioactive substances, achieving a comprehensive improvement in sensing performance and significantly expanding the detection range, especially suitable for monitoring high blood sugar individuals.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Dhanusiya Govindasamy, Ashwani Kumar
Summary: The amount of electricity produced by a solar panel is affected by its operating temperature. To increase efficiency, the use of phase change material (PCM) is a viable strategy. The study found that the integration of PCM successfully lowered the maximum temperature of the solar photovoltaic panel, increased power output, and improved electrical efficiency.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Anurag Roy, Shubhranshu Bhandari, Senthilarasu Sundaram, Tapas K. Mallick
Summary: The research utilized CeO2 nanoparticles as a light scattering layer, combined with anatase TiO2 nanocubes film to fabricate a CeO2-TiO2 hybrid photoanode, which significantly improved the power conversion efficiency of DSSCs.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Vandana, Reema Gupta, Monika Tomar, Ram Pal Tandon, Vinay Gupta
Summary: Chemical solution deposition technique was used to grow polycrystalline PZT thick films on different substrates with and without a TiO2 buffer layer, showing significant effects on the structural, dielectric, and electrical properties of the PZT films. The optimized TiO2-buffered PZT thick film demonstrated improved dielectric properties and reduced leakage current density. Furthermore, a ferroelectric photovoltaic device fabricated using the optimized PZT thick film exhibited increased power conversion efficiency and stability under UV light of varying intensities.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
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)