Article
Materials Science, Multidisciplinary
Guiqing Huang, Wanneng Ye, Chunxiao Lv, Denys S. Butenko, Chen Yang, Gaolian Zhang, Ping Lu, Yan Xu, Shuchao Zhang, Hongwei Wang, Yukun Zhu, Dongjiang Yang
Summary: In this study, RP modified TiO2 hollow spheres were used for solar-to-hydrogen conversion. The optimal hydrogen production rate was achieved with the TiO2@RP heterostructure under simulated solar light irradiation. The hollow sphere structure and RP light absorber extended light absorption ability, and the heterostructure induced interfacial charge migration facilitated photoinduced charge separation, resulting in enhanced photocatalytic hydrogen production performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiayi Yin, Martina Roso, Carlo Boaretti, Alessandra Lorenzetti, Alessandro Martucci, Michele Modesti
Summary: A PVDF-TiO2 core-shell composite nanofibrous membrane with photocatalytic activity was successfully obtained through microwave-assisted hydrothermal treatment of an electrospun PVDF membrane. The effects of precursor solution acidity, heating temperature, and treatment time on the structure and photocatalytic performance were investigated, showing that an increase in temperature and treatment time resulted in an accumulation of TiO2 on the surface of PVDF NFs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Feiyan Lu, Kao Chen, Qingge Feng, Huidong Cai, Dachao Ma, Dongbo Wang, Xiang Li, Chen Zuo, Sinan Wang
Summary: The study focuses on the synthesis of TiO2-based materials for photocatalysis in water treatment, emphasizing the need to address issues related to catalyst separation and carrier recombination. The research introduces a novel magnetical core-shell Fe3O4@SiO2@Sn-TiO2 composite photocatalyst with enhanced performance in tetracycline hydrochloride degradation. Sn2+ doping increases TiO2 content, resulting in improved photocatalytic activity and recyclability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Renhua Chen, Suying Ding, Bo Wang, Xuechang Ren
Summary: ZnFe2O4 microspheres were prepared by solvothermal method, and a novel ZnFe2O4@TiO2 core-shell composite photocatalyst was prepared by ultrasonic (denoted as ZT-x) and mechanical stirring (denoted as ZTM-1.2). The ZT-1.2 catalyst showed the best photocatalytic degradation activity, and exhibited excellent stability.
Article
Chemistry, Physical
Dong-Eun Lee, Vidyasagar Devthade, Satyanarayana Moru, Wan-Kuen Jo, Surendar Tonda
Summary: This study demonstrates the efficacy of a magnetically sensitive TiO2 hollow sphere/Fe3O4 core-shell hybrid catalyst for the sunlight-assisted degradation of aqueous antibiotic pollutants. The hybrid catalyst exhibited significantly higher activity than the pure TiO2 hollow sphere catalyst and showed strong optical response properties and charge separation capabilities. The catalyst can be magnetically recovered and reused without significant loss in its activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jinho Lee, Jiyong Hwang, Hyunsu Park, Tohru Sekino, Woo-Byoung Kim
Summary: A new and sustainable green surface modification process was developed to improve environmental pollution by modifying the surface and structural properties of nanostructured materials. The synthesized homo-core/shell TiO2 (HCST) showed high organic pollutant adsorption properties and accelerated photocatalytic activity.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Aaron Bayles, Shu Tian, Jingyi Zhou, Lin Yuan, Yigao Yuan, Christian R. Jacobson, Corbin Farr, Ming Zhang, Dayne F. Swearer, David Solti, Minghe Lou, Henry O. Everitt, Peter Nordlander, Naomi J. Halas
Summary: This study introduces Al@TiO2 core-shell nanoparticles as active photocatalysts for hot electron-mediated H-2 dissociation reaction and hot hole-mediated methanol dehydration. The research indicates that the photocatalytic mechanism involves plasmonic hot carrier generation and subsequent transfer into the TiO2 layer. The Al@TiO2 antenna-reactor offers an earth-abundant solution for the future design of visible-light-driven plasmonic photocatalysts.
Article
Engineering, Environmental
Yu-Xuan Li, Chong-Chen Wang, Huifen Fu, Peng Wang
Summary: The TiO2/MIL-125 core-shell composites were successfully prepared and exhibited superior photocatalytic performance, with the optimal MT-2 showing excellent activity in Cr(VI) reduction. Additionally, the formation of TiO2 nanosheets improved the separation efficiency of photo-induced carriers.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Sabina Ait Abdelkader, Zhenpeng Cui, Abdelghani Laachachi, Christophe Colbeau-Justin, Mohamed Nawfal Ghazzal
Summary: This study investigates the electronic and photocatalytic properties of core-shell heterojunctions photocatalysts with reversible configuration of TiO2 and Bi2O3 layers. The research shows that in the optimal core-shell design, Bi2O3 collects holes from TiO2, leaving electrons free to react and increasing the photocatalytic efficiency by 5 times towards H-2 generation. The results provide new insights into the importance of designing and elaborating optimal heterojunctions based on the photocatalyst system to improve photocatalytic activity.
FRONTIERS IN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Shuang Wang, Mei-ru Chen, Si-bo Shen, Cai-hong Cheng, Ai-jun Cai, Ai-jun Song, Xu-lin Lu, Gui-sheng Gao, Ming-zhen Ma, Zhi-wei Zhang, Xi-yan Xu
Summary: A conduct-semiconductor-type catalyst Fe7S8@MoS2-O with strong visible light absorption and long carrier life was synthesized using the one-pot hydrothermal method. The catalyst showed high efficiency in the degradation of malachite green and levofloxacin, which could be further enhanced by peroxymonosulfate. It also exhibited good disinfection performance for Staphylococcus aureus and Escherichia coli. The band structures of the catalyst were analyzed using density functional theory calculations.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Physics, Condensed Matter
Mansoor Farbod, Leila Sharif, Ameneh Ahangarpour
Summary: ZnO hollow spheres and Ag@ZnO yolk-shell nanostructures were successfully synthesized using a hydrothermal method in this study, and their dye absorption and photocatalytic performances were investigated. The results showed that ZnO hollow spheres exhibited good dye absorption, while Ag@ZnO yolk-shells demonstrated better photocatalytic performance due to the presence of Ag nanoparticles as a plasmonic material.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Qiankun Xu, Yaru Li, Wen Ji, Jun Mei, Xianbiao Wang
Summary: Water contamination by toxic Cr(VI) can be solved effectively using a more efficient photocatalytic approach. The interaction between photocatalyst heterostructure is crucial for charge separation, which greatly impacts the photocatalytic efficiency. TiO2 hollow sphere/UiO-66-NH2 (TiO2/UiO-66-NH2) heterostructures were successfully synthesized through an adsorption-induced in-situ solvothermal growth method. The introduction of UiO-66-NH2 significantly enhanced the reduction efficiency of Cr(VI) by TiO2/UiO-66-NH2 heterostructures, reaching 89% after 180 minutes of irradiation, much higher than TiO2 hollow spheres (10%) and UiO-66-NH2 crystals (29%). The TiO2/UiO-66-NH2 heterostructures also displayed good regeneration ability and maintained 70% of Cr(VI) removal capacity after four cycles. The integration of TiO2 and UiO-66-NH2 could form a type-II heterojunction, expanding the absorption range of light and suppressing recombination of photogenerated electrons and holes. This research not only provides a new approach for in-situ solvothermal synthesis of semiconductor@MOFs composites, but also offers a novel photocatalyst for highly efficient removal of Cr(VI) from wastewater.
Article
Chemistry, Physical
Bi Fu, Jianjie Li, Huaide Jiang, Xiaoli He, Yanmei Ma, Jingke Wang, Chengzhi Hu
Summary: Ferroelectric materials can enhance piezocatalysis and photocatalytic activities by generating an electric field under strain, promoting redox reactions and separation of electron-hole pairs. The study demonstrates that increasing the inner piezopotential of ferroelectric nanofibers enhances the synergistic piezophototronic effect, leading to improved performance.
Article
Engineering, Environmental
JiaYi Yin, Carlo Boaretti, Alessandra Lorenzetti, Nicola Trivellin, Michele Modesti, Martina Roso
Summary: Polyvinylidene fluoride (PVDF)/titanium dioxide (TiO2) core/shell composite nanofibrous membranes (CNMs) were prepared using coaxial electrospinning. These membranes exhibit a large surface area and abundant reactive sites, allowing for excellent photocatalytic degradation of phenol in a liquid phase. The PVDF/TiO2 CNM showed enhanced photocatalytic activity under UV irradiation due to the piezo-potential field generated on the PVDF core-fibers.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yongqian Cui, Zipeng Xing, Meijun Guo, Yalu Qiu, Bin Fang, Zhenzi Li, Shilin Yang, Wei Zhou
Summary: A hollow core-shell potassium phosphomolybdate (KMoP)@cadmium sulfide (CdS)@bismuth sulfide (Bi2S3) Z-scheme tandem heterojunction with a narrow band gap and excellent photothermal performance was fabricated. This structure showed outstanding photocatalytic performance in H-2 production, Cr-VI reduction, and degradation of tetracycline (TC). The high stability and boosted photocatalytic performance were attributed to the core-shell Z-scheme tandem heterojunction design strategy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(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)