Article
Crystallography
Federico Giuffrida, Lucia Calcagno, Gianni Pezzotti Escobar, Massimo Zimbone
Summary: The photocatalytic properties of TiO2/FeO3 and TiO2/WO3 nanocomposites were investigated for the degradation of methylene blue. The non-conventional Doctor Blade technique was proposed as an easy and inexpensive method for material preparation. The use of solid substrates rather than powders and the high surface area of nanoparticles improved the photodegradation efficiency.
Article
Chemistry, Multidisciplinary
Tingting Hu, Panpan Feng, Liping Guo, Hongqi Chu, Fusheng Liu
Summary: Ti2O3@TiO2 core-shell heterojunction composite photocatalysts with different internal electric fields were successfully synthesized using heat treatment methods. The optimized materials exhibited significantly enhanced photocatalytic performance due to the efficient separation of photogenerated charge carriers derived from the built-in electric field, leading to improved degradation efficiency.
Article
Chemistry, Multidisciplinary
Qianqian Chi, Genping Zhu, Dongmei Jia, Wei Ye, Yikang Wang, Jun Wang, Ting Tao, Fuchun Xu, Gan Jia, Wenhao Li, Peng Gao
Summary: The synthesis of p-n heterojunction TiO2/BiOBr with a built-in electric field is crucial for enhancing the efficiency of overall water splitting through photocatalysis. The sample exhibits exceptional photoelectron responses and the highest water splitting rates under visible light without other cocatalysts reported in literature, making it a promising photocatalyst for hydrogen production.
Article
Engineering, Environmental
Biyang Tu, Jiarong Hao, Fenghe Wang, Yafei Li, Jining Li, Jinli Qiu
Summary: TiO2-based heterojunction photocatalyst modified with element doping (N, I, Fe, and Ce) showed enhanced photocatalytic activity, with I-TiO2/CdS demonstrating the highest activity. DFT calculations and electrochemical tests revealed that high-electronegativity I doping increased the difference of Fermi level between TiO2 and CdS, resulting in lower charge migration resistance and higher carrier separation behavior at the interface, leading to improved photocatalytic performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Seema Devi, Saurabh Suman, Surjeet Chahal, Saurabh Singh, Sandeep Ankita, Parmod Kumar, Sandeep Kumar, Ashok Kumar, Vinod Kumar
Summary: Hybrid nanocomposite materials consisting of multi walled carbon nanotubes (MWCNT) and hematite (a-Fe2O3) were developed for wastewater treatment through photocatalysis. The nanocomposites were prepared using a sonication method and characterized using various techniques. The 10% a-Fe2O3/CNT nanocomposites exhibited higher photocatalytic activity with 87% degradation of Rose Bengal dye in 90 minutes. The enhanced activity was attributed to the synergistic effects of a-Fe2O3 and CNTs, which reduced charge carrier recombination and promoted the formation of highly active radical species on the CNT surface. This research is significant for understanding the photocatalytic mechanism and developing efficient photocatalysts for organic pollutant degradation.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Guojing Wang, Tao Chen, Shuo Liu, Fengqi Wang, Mingyang Li, Mingzheng Xie, Jing Wang, Yunjie Xiang, Weihua Han
Summary: By loading TiO2 nanoparticles onto MnO2 nanosheets to form a nanostructured heterojunction, the separation/transfer efficiency of photocarriers and the solar absorptivity were improved, enhancing the solar energy conversion efficiency. The enhanced carrier transfer efficiency and visible absorption can be attributed to the 2D network of MnO2 and narrowed bandgap, leading to an increased H-2 production rate and improved photocatalytic properties.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Jian Lin, Yulian Tao, Jialiang Liu, Chan Zheng, Xiaoyi Song, Pingqiang Dai, Qianting Wang, Wei Li, Wenzhe Chen
Summary: Photocatalytic micromotors, such as the TiO2@CMS core-shell micromotors, show enhanced degradation of organic contaminants in water remediation. They can be easily prepared and offer self-propulsion, high degradation efficiency, and photocatalytic performance. These micromotors have great potential for applications in water purification and wastewater treatment.
Article
Chemistry, Multidisciplinary
Themba D. Ntuli, Ludwe L. Sikeyi, Faria Dziike, Neil J. Coville, Edward N. Nxumalo, Manoko S. Maubane-Nkadimeng
Summary: Waste cooking oil was converted into onion-like nanocarbons (OLNCs) through flame pyrolysis and then combined with TiO2 to form TiO2/OLNC nanocomposites using hydrothermal treatment. The mass ratio of TiO2 to OLNCs was varied, while the mass of TiO2 was kept constant. The nanocomposites exhibited enhanced photocatalytic activity and degradation efficiency for methyl orange due to the high adsorption efficiency of OLNCs and the hindrance of electron-hole recombination.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
M. A. Majeed Khan, Poonam Nain, Jahangeer Ahmed, Maqusood Ahamed, Sushil Kumar
Summary: The study investigated the effect of Cu doping on TiO2 matrix, revealing an increase in the photocatalytic activity of Cu-doped TiO2 NPs. This suggests promising potential for applications in various environmental processes.
Article
Chemistry, Physical
Yuan Wang, Shunli Wang, Yabiao Wu, Zinan Wang, Honghao Zhang, Zongsheng Cao, Jie He, Wei Li, Zhengchun Yang, Lingcheng Zheng, Deqiang Feng, Peng Pan, Jinlian Bi, Huayi Li, Jinshi Zhao, Kailiang Zhang
Summary: In this study, a magnetic photocatalyst alpha-Fe2O3/reduced graphene oxide (rGO) was developed to enhance photocatalytic efficiency under a magnetic field. The introduction of rGO improved the transfer of photogenerated carriers and the interface effect between alpha-Fe2O3 and rGO enhanced magnetization intensity. The alpha-Fe2O3/rGO composite photocatalyst demonstrated excellent photocatalytic performance, especially at a mass ratio of 10:1, and the magnetic field further improved the photocatalytic reaction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Xinru Li, Nan Sun, Yaoning Bai, Yuwei Yan, Taoyuan Ouyang, Xu Wang, Xiaodi Jiang, Zichen Wang, Xiaoming Cai, Jinming Cai, Honglin Tan
Summary: In this study, silver nanoparticles of two different sizes were prepared and compounded with semiconductor materials, demonstrating the photocatalytic enhancement of the system. It was found that the hydrogen yield was almost unaffected by the silver core diameter and the hydrogen production rate was essentially the same. Additionally, the rate of hydrogen precipitation in air for 9 months was significantly higher than previous studies, providing a new idea for the study of oxidation resistance and stability of photocatalysts.
Article
Nanoscience & Nanotechnology
Feitong Lu, Wei Wei, Qiang Shi, Ning Wang, Yi Xiao, Zibo Li
Summary: TiO2/graphene oxide (GO) nanocomposites with high contact interface were prepared using PEG400 as a dispersant, and exhibited improved photocatalytic efficiency compared to those prepared without PEG400. The photocatalytic performance was evaluated by measuring the degradation rate of Rhodamine B (RhB), and it was found that the mass ratio of GO in the nanocomposites played a crucial role. The highest photocatalytic performance was achieved when the mass ratio of GO reached 45%, corresponding to approximately 72%. The photocatalytic mechanism was elucidated through theoretical calculations, which showed that the presence of GO reduced the band gap of TiO2 nanoparticles, suppressed the recombination of photogenerated electron-hole pairs, and enhanced the adsorption capacity of TiO2 nanoparticles for RhB. This study facilitates the application of TiO2/GO nanocomposites in wastewater treatment.
Article
Chemistry, Physical
Xiaodong Zhu, Fengqiu Qin, Yuhao Luo, Ling Zhang, Daixiong Yang, Wei Feng, Shanhua Chen
Summary: A new BaSnO3/TiO2 p-n heterojunction composite photocatalyst with anatase/rutile/brookite three-phase coexistence was investigated. The results showed that the built-in electric field at the heterogeneous interfaces promoted the separation of photogenerated charges and enhanced the photocatalytic performance. The composite with a Ba/Ti molar ratio of 5% exhibited the highest photocatalytic activity.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Yuqiang Sheng, Wenlu Li, Liangliang Xu, Yongfa Zhu
Summary: A highly crystalline perylene imide supramolecular photocatalyst (PDI-NH) with breakthrough oxygen evolution rate and high quantum yield was synthesized via the imidazole solvent method. The highly crystalline structure is achieved through ordered self-assembly in molten imidazole solvent through pi-pi stacking and hydrogen bonding. The excellent performance is attributed to the robust built-in electric field, which accelerates charge separation and transfer. Furthermore, the catalyst is highly stable and can be reused.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Fatemehsadat Moosavi, Alex Lemarchand, Cyrille Bazin, Maria Konstantakopoulou, Mathieu Fregnaux, Christophe Colbeau-Justin, Touraj Tavakoli Gheinani, Andrei Kanaev, Mehrdad Nikravech
Summary: Nanocomposite TiO2 coatings with mixed anatase-rutile crystalline polymorphs and strong adherence to glass substrates were prepared using a spray-plasma deposition method. The coating exhibited enhanced photocatalytic activity for cefixime antibiotic decomposition under UVA light illumination, and the activity significantly increased after the formation of the rutile phase, suggesting a synergistic effect of the two-component solids.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(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)