Article
Chemistry, Physical
S. Jagadeesh Babu, Murthy Muniyappa, Rao V. Navakoteswara, Ravi Mudike, Mahesh Shastri, Sardar Tathagata, Prasanna D. Shivaramu, M. V. Shankar, C. S. Ananda Kumar, Dinesh Rangappa
Summary: This work reports an improved hydrogen evolution activity of visible light active TiO2-x photocatalyst by introducing reduced graphene oxide. The characteristic studies reveal that RGO/TiO2-x nanocomposites were sufficiently durable and efficient for photocatalytic hydrogen generation under the visible light spectrum.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Ioana Tismanar, Alexandru Cosmin Obreja, Octavian Buiu, Anca Duta
Summary: This research reports on the fabrication of visible and solar-active photocatalytic bi-layered films, and the testing of their crystallinity degree, surface morphology, and elemental composition. The results showed that increasing the filler content can improve the process efficiency at high irradiance values, but the increase in photocatalytic efficiencies is limited due to electron-hole recombination. The thin films also demonstrated good stability in aqueous medium.
Article
Materials Science, Multidisciplinary
Jeong Seok Yeon, Young Hun Ko, Tae Ho Park, Hyunyoung Park, Jongsoon Kim, Ho Seok Park
Summary: The multidimensional architectured hybrid (Co@CNT/nG) suppresses the shuttle effect of lithium polysulfides and enhances conversion redox kinetics for improved sulfur utilization in lithium-sulfur batteries. Through various measurements, it is demonstrated that the Co@CNT/nG-70S-based LSB cells achieve a high-specific capacity of 1193.1 mAh g(-1) and a low capacity decay rate of 0.030% per cycle for 700 cycles, delivering a high areal capacity of 5.62 mAh cm(-2).
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Materials Science, Coatings & Films
Getabalew Shifera Weldegrum, Pragya Singh, Bohr-Ran Huang, Ting-Yen Chiang, Kuan-Wei Tseng, Chun-Ju Yu, Chen Ji, Jinn P. Chu
Summary: The study successfully fabricated ZnO-NWs/MeNTA structure for large-scale production of highly dense laterally and vertically aligned ZnO nanowires with good optical and crystal structural properties. These nanowires can be applied in optoelectronics, sensors, piezoelectric devices, solar cells, and battery applications.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Miao Xu, Kang Li, Shen Wang, Shengyu Zhou, Hulin Zhang, Hongbo Xu, Jiupeng Zhao, Yao Li
Summary: By designing a TiO2/Au/PB nanorod array, the stability and switching speed of Prussian blue in electrochromic applications can be improved. The designed structure increases reactive sites and conductivity, enhances ion storage capacity, and promotes charge transfer through localized surface plasmon resonance effect.
Article
Chemistry, Physical
Miao Xu, Kang Li, Shen Wang, Shengyu Zhou, Hulin Zhang, Hongbo Xu, Jiupeng Zhao, Yao Li
Summary: A TiO2/Au/PB nanorod array is designed to enhance the stability and electrochromic performance of Prussian blue, showing potential for electrochromic applications.
Article
Chemistry, Multidisciplinary
Andrea Basso Peressut, Cinzia Cristiani, Giovanni Dotelli, Anna Dotti, Saverio Latorrata, Ana Bahamonde, Antonio Gasco, Daphne Hermosilla, Riccardo Balzarotti
Summary: This study presents preliminary results on the development of composite self-assembling membranes combining reduced graphene oxide (rGO) and commercial Degussa P25 titanium dioxide (TiO2). The purpose is to demonstrate their capability to treat wastewater containing both inorganic and organic pollutants by leveraging rGO's metal ion capturing ability and TiO2's organic substance degradation ability. The study also explores the potential photocatalytic properties of waste-derived TiO2 (TIO) as a replacement for commercial TiO2, supporting a circular economy approach. The composite membranes were prepared, characterized, and tested for metal adsorption and organic pesticide degradation, showing promising results.
Article
Chemistry, Physical
Hira Fatima, Muhammad Rizwan Azhar, Yijun Zhong, Yasir Arafat, Mehdi Khiadani, Zongping Shao
Summary: This study reports a method of modifying zinc oxide nanoparticles (ZnO NPs) with zeolite imidazole framework-8 (ZIF8) to improve their photocatalytic degradation performance. By serving as a trap for photogenerated electrons, ZIF8 reduces the rate of charge recombination, while the hybridization process suppresses the aggregation of ZnO NPs and provides more active sites. The research provides a simple and effective strategy for developing new photocatalysts with wide application potential.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Physics, Applied
Kai Yang, Shenghui Kang, Xiaoyu Wu, Bohua Liu, Chongling Sun, Yanyan Wang
Summary: A high NIR sensitivity and spectral selectivity photothermal detector was developed by modifying a photothermal layer of reduced graphene oxide-Au nanorods hybrid. The detector converts light energy into heat and measures resistance changes. The hybrid material exhibits remarkable photothermal conversion efficiency and dependence on spectral response, resulting in high sensitivity to illumination in the wavelength range from 700 to 1000 nm.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Wenjun Yan, Na Li, Zhiyu Yan, Yu Niu, Yuan Deng, Zhongde Wang
Summary: This study successfully prepared Pd/Au bimetallic nanoparticle-anchored BiVO4/TiO2 nanotube arrays, which exhibited excellent photoelectrocatalytic activity for the SMC reactions of aryl boronic acids with substituted aryl halides under ambient conditions, benefiting from the synergistic effect of effective charge carriers separation, wide spectral response, strong component interactions, and abundant active centers.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Guanghui Wang, Jialing Dai, Qiuyan Luo, Nansheng Deng
Summary: A novel TiO2@ACD@RGO composite photocatalyst was successfully synthesized by a photochemical method, displaying high photocatalytic efficiency for the degradation of BPA with a reaction constant of 0.739 mg/L∙min, attributed to improved electron transfer and mass transfer at the interface. The predominant reactive oxygen species for BPA degradation were identified as O-2(-) and h(+). Additionally, the TiO2@ACD@RGO composite exhibited excellent stability and reusability after five cycles.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jiage Yu, Lihua He, Jia You, Lanlan Huang, Honghui Shu, Bingqing Zhang
Summary: In this study, TiO2 quantum dots were prepared on reduced graphene and Au-TiO2 quantum dot graphene electrodes were achieved. The Au-TiO2 quantum dot graphene electrode showed higher electrocatalytic activity for glucose oxidation compared to other electrodes, which could be attributed to the synergistic catalytic effects of TiO2 quantum dots and Au, as well as the use of graphene as a substrate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Huihui Deng, Cunqi Qin, Kemei Pei, Guoyong Wu, Mei Wang, Huagang Ni, Peng Ye
Summary: In the catalytic process of semiconductors, the rapid recombination of electron-holes greatly reduces the catalytic activity. A low-defect reduced hydroxylated graphene (RGOH) was used as a carrier material to prepare TiO2/reduced hydroxylated graphene (T/RGOH) nanocomposite photocatalyst, which showed a higher degradation efficiency for methylene blue compared to pure TiO2 and TiO2/reduced graphene oxide (T/RGO) nanocomposite photocatalysts. The enhanced performance was attributed to the higher electrical conductivity of RGOH and the existence of Ti-O-C bonds in the T/RGOH, which improved electron-hole separation and prevented rapid recombination.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yang Li, Ya-Li Yang, Gui Chen, Jia-Jie Fan, Quan-Jun Xiang
Summary: The size of metal nanoparticles plays a vital role in enhancing the photocatalytic activity of photocatalysts. This study investigates the mechanism behind the improvement of photocatalytic CO2 reduction performance, showing that the Au cluster/TiO2/Ti3C2 photocatalyst with quantum size effect outperforms the Au nanoparticle/TiO2/Ti3C2 photocatalyst with surface plasmon resonance. The enhanced photocatalytic CO2 reduction activity is attributed to the establishment of an overlapping orbital between the Au cluster's lowest unoccupied molecular orbital (LUMO) and the anti-bonding orbital of CO2.
Article
Chemistry, Applied
Maria A. Esteves, Fernando Fresno, Vitor R. Fernandes, Freddy E. Oropeza, Victor A. de la Pena O'Shea, C. M. Rangel
Summary: The study investigates the production of hydrogen by photocatalysis using TiO2-based photocatalysts, exhibiting excellent performance in both liquid and gas phases, with rGO enhancing the effect of Pt. Factors such as ethanol concentration, graphene oxide, Pt content, and solution pH have a certain impact on hydrogen generation.
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)