Article
Chemistry, Inorganic & Nuclear
Zohra Nazir Kayani, Ammara Iqbal, Zainab Bashir, Saira Riaz, Shahzad Naseem
Summary: Researchers are increasingly interested in thin film materials due to the growing demand in the electronics industry. In this study, K-doped TiO2 thin films were synthesized using sol-gel dip-coating, and the effects of K concentration on the properties of the films were investigated. The results showed that K doping had a significant impact on the morphological, structural, magnetic, dielectric, antibacterial, and optical characteristics of the TiO2 films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
M-B Bouzouraa, A. En Naciri, Y. Battie, S. Dalmasso, S. Diliberto, A. Bouche, N. Chaoui
Summary: This study investigated the effects of nitrogen N+2 ion beam on TiO2 thin films using various techniques such as Raman spectroscopy, grazing incidence X-ray diffractometer (GIXRD), X-ray photoelectron spectroscopy (XPS), spectroscopic ellipsometry (SE), atomic force microscopy (AFM), and photoluminescence spectroscopy (PL). The results showed significant changes in the physical properties of TiO2 after exposure to the N+2 ion beam.
Article
Materials Science, Multidisciplinary
Zohra Nazir Kayani, Mamoona Ashfaq, Saira Riaz, Shahzad Naseem
Summary: In this study, copper-doped titanium dioxide thin films were synthesized on glass substrates using a sol-gel dip-coating technique. The addition of copper affected the structural, morphological, dielectric, antibacterial, and optical properties of the films. The copper-doped films showed low dielectric constant, making them ideal for high-frequency devices, and the optical band gap energy decreased with increasing copper concentration, improving the efficiency of solar cells. Moreover, the copper-doped films exhibited enhanced photocatalytic activity, which could be potentially applied in water treatment.
Article
Physics, Condensed Matter
Tapash Chandra Paul, Majibul Haque Babu, Jiban Podder, Bidhan Chandra Dev, Sapan Kumar Sen, Suravi Islam
Summary: This article explores the influence of Fe3+ ions on the surface morphological, structural, optical, and electrical properties of TiO2 thin films. It is found that an increase in Fe content leads to a red shift in absorption spectra, a decrease in band gap, and changes in optical parameters and electrical properties. This study provides valuable insights for standardizing Fe-doped TiO2 thin films for optoelectronic device applications.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Nanoscience & Nanotechnology
Yi Yang, Tianyu Sun, Fuliang Ma, Liang-Feng Huang, Zhixiang Zeng
Summary: A Fe3+ doped TiO2 film with long-lasting superhydrophilicity and antifogging is prepared in this study, and experiments along with density-functional theory calculations are conducted to investigate the antifogging performance and the underlying microscopic mechanism of Fe3+ doped TiO2. The results show that Fe3+ doping can enhance the photolysis ability of TiO2 under sunlight exposure and stabilize the hydroxyl adsorbate on TiO2 surface, leading to a long-lasting superhydrophilicity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ahmed M. Bolbol, Omar H. Abd-Elkader, Hassan Elshimy, Zaki I. Zaki, Salah A. Shata, M. Kamel, Ahmed S. Radwan, Nasser Y. Mostafa
Summary: In this study, dense thin films of TiO2 and TiO2 doped with Zr4+ were prepared using spin coating on glass substrate and characterized. The results showed that doping Zr4+ can change the optical and crystalline structure properties of TiO2, with higher doping concentration leading to lower band gap energy, slight lattice enlargement, and smaller crystal size. Additionally, the doped films exhibited typical photoluminescence in the visible spectrum region and had a lower rate of electron-hole recombination.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Victor V. Petrov, Irina O. Ignatieva, Maria G. Volkova, Irina A. Gulyaeva, Ilya V. Pankov, Ekaterina M. Bayan
Summary: Transparent Al-doped ZnO films were synthesized by solid-phase pyrolysis and characterized by XRD, SEM, and TEM. The films exhibit wurtzite structure and have a uniform distribution of nanoparticles. The introduction of 1% Al results in a narrowed band gap and improved response time to radiation.
Article
Engineering, Electrical & Electronic
M. Mahdi Shahidi, T. Hoda Enayati, Agnes C. C. Nkele, Ugochi K. K. Chime, Fabian I. I. Ezema
Summary: In this study, TiO2 films were prepared on FTO substrates through spray pyrolysis and their electrochemical properties were investigated after TiCl4 treatment. The structure, surface morphologies, optical and electrochemical characteristics of the synthesized films were analyzed using various techniques. The films exhibited anatase phase with a prominent peak at the (004) plane in XRD and Raman spectra. Porous films with an average surface roughness of 36.95 nm were obtained. Optical studies showed increased transmittance and band gap energy ranging from 2.71 to 2.76 eV. The films also exhibited improved carrier mobility and charge storage capability. These synthesized films have potential applications in solar cells and supercapacitors.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Pratheep Panneerselvam, Vignesh Murugadoss, Tae Geun Kim, Subramania Angaiah
Summary: In this study, a compact TiO2 thin film was prepared as an electron transport layer for perovskite solar cells using an artist spray gun-assisted pyrolysis method. The influence of spray gun distance on film quality was investigated, confirming anatase TiO2 formation and a bandgap of 3.19 eV. The prepared TiO2 thin film showed uniform deposition and achieved a power conversion efficiency of 2.69% in Pb-free perovskite solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
S. Mugundan, P. Praveen, S. Sridhar, S. Prabu, K. Lawrence Mary, Mohd Ubaidullah, Shoyebmohamad F. Shaikh, S. Kanagesan
Summary: Undoped and barium doped TiO2 nanoparticles were synthesized using a sol-gel method and calcined to obtain crystalline particles. Barium doping resulted in increased size of TiO2 particles. The presence of Ti, O, and Ba elements and the presence of anatase and barium titanate phases were confirmed. The specific surface area, porosity, functional groups, bandgap, and photocatalytic activity were studied for both pure and barium doped TiO2 nanoparticles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Guangri Jia, Ying Wang, Xiaoqiang Cui, Hengzhong Zhang, Jingxiang Zhao, Lu Hua Li, Lin Gu, Qinghua Zhang, Lirong Zheng, Jiandong Wu, Qiong Wu, David J. Singh, Weiwei Li, Lei Zhang, Weitao Zheng
Summary: The introduction of hydrogen into TiO2 greatly enhances its photocatalytic properties, leading to a 60 times enhancement of photocatalytic hydrogen evolution activity. Hydrogenated TiO2 with switchable defects is synthesized through a one-step wet-chemistry method and controlled annealing. The obtained hydrogenated TiO2 exhibits improved visible light absorption and efficient separation of photogenerated carriers, resulting in significantly enhanced photocatalytic activity.
Article
Chemistry, Physical
Erika Colin-Ulloa, Julia L. Martin, Ryan J. Hanna, Michelle H. Frasch, Rebecca R. Ramthun, Hussein O. Badr, Joshua R. Uzarski, Michel W. Barsoum, Ronald L. Grimm, Lyubov V. Titova
Summary: We demonstrated scalable synthesis of one-dimensional titania lepidocrocite microfilaments using Ti-containing water-insoluble compounds and tetraalkylammonium hydroxide. These nanofilaments exhibit high band gap energy and significant absorbance throughout the visible spectrum, suggesting potential applications in photocatalysis and optoelectronics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Alex J. Tanner, Bo Wen, Yu Zhang, Li-Min Liu, Helen H. Fielding, Annabella Selloni, Geoff Thornton
Summary: Recent discussions have addressed the excitation of surface-localized polaronic states as an additional photocatalytic channel for rutile TiO2, in addition to band gap excitation. It has been theorized that photoexcitation of bulk polarons may provide a greater contribution due to their higher number and protection from oxidation. However, experimental determination of this contribution to the photoyield has been challenging. Through two photon photoemission spectroscopy measurements, it has been found that bulk polarons have a lower binding energy compared to surface polarons, with a similar photoexcitation resonance energy as at the surface.
Article
Materials Science, Multidisciplinary
S. Muthukrishnan, R. Vidya, Anja Olafsen Sjastad
Summary: Pure anatase TiO2 only has photocatalytic activity in the UV region of solar energy. External impurities can be added to reduce the band gap of TiO2 and enhance its absorption of the visible spectrum. This study investigated the effect of Sc and V mono-doping and co-doping on the electronic structure of pure anatase TiO2 using Density Functional Theory (DFT).
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Saqib, Nasir Rahman, Kashif Safeen, Saleh D. Mekkey, Mohamed A. Salem, Akif Safeen, Mudasser Husain, Shams u Zaman, Sherzod Abdullaev, Azra Kalsoom, Zeinhom M. El-Bahy, Rajwali Khan
Summary: The authors propose a method to enhance the photodegradation properties of TiO2 nanoparticles by doping them with cobalt and sulfur. The doped TiO2 nanoparticles show significantly improved photoactivity compared to pure TiO2. The study explores the physical mechanisms behind this enhancement and demonstrates the potential for large-scale nanoparticle production for industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
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)