Article
Chemistry, Multidisciplinary
Ximena Jaramillo-Fierro, Ricardo Leon
Summary: The study investigated the ability of TiO2, La/TiO2, Ce/TiO2, and Eu/TiO2 nanoparticles to remove free cyanide from water. The results showed that La/TiO2 had the highest cyanide removal percentage (98%), followed by Ce/TiO2 (92%), Eu/TiO2 (90%), and TiO2 (88%). This suggests that La, Ce, and Eu dopants can improve the properties of TiO2 and enhance its ability to remove cyanide species from aqueous solutions.
Article
Chemistry, Multidisciplinary
Carla Calabrese, Amelie Maertens, Alessandra Piras, Carmela Aprile, Leonarda Francesca Liotta
Summary: TiO2 nanomaterials were synthesized through a sol-gel method using titanium butoxide as a precursor, Pluronic F127 as a template, toluene as a swelling agent, and acidic water or ethanol as reaction solvents. The synthesis medium influenced the phase composition of the solids, with ethanol promoting dispersed anatase particles and water leading to a rutile phase. The photocatalytic activity of the samples was tested by the photodegradation of Rhodamine B.
Article
Chemistry, Inorganic & Nuclear
Praveen Lavudya, Harita Pant, Vadali V. S. S. Srikanth, Rajanikanth Ammanabrolu
Summary: An easy microwave-assisted hydrothermal method is used to prepare mesoporous and phase pure anatase TiO2 nanospheres in this research. The ATNS exhibits a high specific surface area, high N2 adsorption capacity, and shows a photodegradation efficiency of methylene blue dye as high as 98%.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
El Mountassir El Mouchtari, Lekbira El Mersly, Oussama Jhabli, Hafid Anane, Anne Piram, Samir Briche, Pascal Wong-Wah-Chung, Salah Rafqah
Summary: A new three-dimensional cauliflower-shaped TiO2 immobilised on bio-sourced activated carbon photocatalyst was successfully synthesized, showing promising application in the treatment of wastewater by effectively eliminating emerging organic pollutants.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Sang-Ho Chung, G. Hwan Park, Niels Schukkink, Hyoyoung Lee, N. Raveendran Shiju
Summary: The epoxidation of dicyclopentadiene (DCPD) was investigated on a series of TiO2 catalysts using hydrogen peroxide as an oxidant. DCPD derivatives find applications in various fields including polymers, pharmaceuticals, and pesticides. Ensuring selectivity for the desired product is crucial for these applications. Experimental and computational studies reveal the significant role of the crystalline phases of TiO2 on the formation of peroxo species and the selective epoxidation of the two different C=C double bonds in DCPD.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Sayari Biswas, Asit Kumar Kar
Summary: Anatase titania thin films were prepared at different hydrothermal temperatures, with crystalinity and refractive index increasing with higher temperatures and annealing. Grain size and surface roughness also increased accordingly. The transmittance varied across different wavelength regions, while photocatalytic activity was influenced by hydrothermal temperature and annealing.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Oleksandr Shtyka, Viktar Shatsila, Radoslaw Ciesielski, Adam Kedziora, Waldemar Maniukiewicz, Sergey Dubkov, Dmitry Gromov, Andrey Tarasov, Jacek Rogowski, Andrey Stadnichenko, Petr Lazarenko, Roman Ryazanov, Malgorzata I. Szynkowska-Jozwik, Tomasz Maniecki
Summary: The photocatalytic activity of TiO2 is mainly determined by the desorption rate of reaction intermediates and final products, the specific surface area, and binding strength. Rutile exhibits higher photocatalytic activity than anatase/rutile mixtures due to its efficiency in the visible portion of the electromagnetic spectrum.
Article
Chemistry, Multidisciplinary
Anadil Gul, Raza Ullah, Jihong Sun, Tallat Munir, Shiyang Bai
Summary: Novel mesoporous TiO2/BMMs nanocomposites with bimodal mesoporous silica (BMMs) as support and rutile-anatase mixed phase as active species were successfully synthesized, showing enhanced photocatalytic degradation activity. TBH5c may be a suitable candidate for wastewater treatment.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Applied
P. Rychtowski, B. Tryba, D. Baranowska, B. Zielinska, H. Nishiguchi, M. Toyoda
Summary: Reduction of TiO2 has been studied under different conditions. The addition of ammonia solution followed by hydrothermal treatment and calcination in Ar resulted in the formation of surface defects such as hole traps and oxygen vacancies in the reduced TiO2. Heat-treatment under hydrogen gas produced the highest amount of reduced Ti3+ centers, leading to improved water splitting and enhanced photocatalytic properties. Hydrogen was found to be a stronger reducing agent than ammonia gas.
Article
Materials Science, Ceramics
Maira Marra, Marcello Dumont, Hugo G. Palhares, Himad A. Alcamand, Manuel Houmard, Eduardo H. M. Nunes
Summary: By adjusting the sol-gel parameters and drying/heat treatment conditions, it is possible to control the co-existence of anatase and rutile in the synthesized sol-gel titania. The lack of water in the starting solution favors the formation of both anatase and rutile, improving the photocatalytic behavior of titania.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
V. V. Zlobin, V. N. Nevedomskiy, O. V. Almjasheva
Summary: This study focuses on the formation and growth of TiO2 nanoparticles under hydrothermal conditions. TiO2 nanocrystals were synthesized by dehydrating hydrated titanium dioxide at different temperatures, durations, and precipitation methods for the synthesis precursor. Various characteristics of the synthesized nanoparticles were investigated, and mechanisms for the formation of crystalline titanium dioxide and the growth of anatase structured titanium dioxide nanocrystals under hydrothermal conditions were proposed. The size of TiO2 crystallites was mathematically described based on the chosen model of oriented attachment. The study also revealed the superiority of direct precipitation from titanium tetrachloride as the synthesis precursor and the influence of hydrothermal treatment temperature and synthesis duration on the size, morphology, crystallization rate, agglomeration processes, and specific surface area of the TiO2 nanoparticles.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Junyao Wu, Shan Yi, Yixuan Wang, Jun Yao, Wei Gao
Summary: This study focused on the synthesis of a composite microfiber membrane based on polyacrylonitrile with TiO2 nanoparticles, which exhibited excellent adsorptive-photocatalytic properties for degrading Methylene blue. The adsorption mechanism was analyzed using various models, and the efficiency of the membrane system was illustrated through different kinetic forms. The relationship of microstructure, composition, and MB decomposition performance was revealed by SEM, BET, FTIR, XRD, and TGA, providing new knowledge for designing and evaluating membrane systems for remediation of organic pollutants in water.
INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Diana Rakhmawaty Eddy, Muhamad Diki Permana, Lintang Kumoro Sakti, Geometry Amal Nur Sheha, Solihudin, Sahrul Hidayat, Takahiro Takei, Nobuhiro Kumada, Iman Rahayu
Summary: This study aims to clarify the differences between titanium dioxide polymorphs and their properties in different photocatalytic applications. Homophase titanium dioxide has disadvantages such as high recombination rates and low adsorption capacity. On the other hand, heterophase titanium dioxide can effectively stimulate electron transfer and exhibit superior photocatalytic performance. Various biphase and triphase polymorphs of titanium dioxide are discussed, and the focus is on the synthesis and application of heterophase titanium dioxide as a photocatalyst.
Article
Chemistry, Physical
Yonghui Zhang, Baoji Miao, Qiuling Chen, Zhiming Bai, Yange Cao, Basandorj Davaa
Summary: In this study, TiO2-montmorillonite (MMT) composites were synthesized hydrothermally under variable conditions, characterized, and evaluated for photocatalytic activity. The composite with a TiO2 mass ratio of 30 wt%, prepared at a pH of 6, a reaction temperature of 160 degrees C, and a dwelling time of 24 h showed the highest methylene blue removal efficiency of 95.6%.
Article
Chemistry, Multidisciplinary
Anna Stepanova, Teddy Tite, Iryna Ivanenko, Monica Enculescu, Cristian Radu, Daniela Cristina Culita, Arpad Mihai Rostas, Aurelian Catalin Galca
Summary: Photocatalysis using TiO2 has shown promising results in degrading harmful pollutants. This study synthesized TiO2 powders via a hydrothermal method and analyzed its morphology and structure using various analysis techniques. The results demonstrated that TiO2 exhibited excellent photocatalytic performance in degrading dyes, with pH affecting the formation of TiO2 phases.
Review
Chemistry, Multidisciplinary
Duan Bin, Yanyan Du, Beibei Yang, Hongbin Lu, Yao Liu, Yongyao Xia
Summary: This review presents the recent advances in the Zn2+ storage mechanisms and electrolyte optimization of phosphate-based cathodes for aqueous rechargeable zinc batteries (ARZBs), with a focus on vanadium/iron-based phosphates and their derivatives. The design strategies for both electrode materials and compatible electrolytes are also elaborated to improve the energy density and extend the cycling life of aqueous Zn/polyanion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Yanyan Du, Yufeng Xu, Yulin Zhang, Beibei Yang, Hongbin Lu, Cunwang Ge, Duan Bin
Summary: This study develops a dissolution-regrowth and conversion strategy using a metal-organic framework template to in situ form porous one-dimensional channels and unique nanostructures of CoVOx oxide. The unique structure allows for high diffusion and low interfacial resistance, resulting in a high reversible capacity of 288 mAh/g and long cycle life of the CoVOx-2 nanoplate cathode. These findings provide a new insight into high-performance MOF-derived unique structure designs for rechargeable battery electrodes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Gengjie Wang, Yaoyin Zhang, Lu Zhu, Yujie Ma, Shumin Zhang, Zhifu Huang, Zhenhua Cao, Xiangkang Meng
Summary: In this study, coating of various metals on carbon nanotubes was performed using magnetron sputtering and molecular dynamics simulation. Transmission electron microscopy and simulation studies revealed three modes of metal nucleation on the carbon nanotube surface: particle growth, island growth, and film growth. The nucleation mode was mainly influenced by three factors: the initial energy of the metal before reaching the carbon nanotube surface, the energy required for carbon nanotube to bond with metal, and the diffusion energy of metal atoms on the carbon nanotube surface. Based on the analysis of jump trajectory, potential energy, and temperature change of metal atoms in molecular dynamics simulation, a method for improving deposition ratios by alloying and increasing deposition rate was proposed and verified through simulation and experiments. These results provide a new approach to regulate the interface structure and nucleation model of carbon nanotubes and metals.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Qingxi Zhai, Kuo-Juei Hu, Yuxuan Shi, Hurong Ji, Hao Wu, Yilun Ren, Biao Wang, Shaochun Tang, Yujie Ma, Mingjin Cui, Xiangkang Meng
Summary: In this study, a novel amorphous-crystalline heterostructure material, MS/Ni0.67Fe0.33-MOF, was successfully synthesized by embedding crystalline metal sulfide (MS) into amorphous Ni0.67Fe0.33-MOF. The material exhibited excellent catalytic performance, durability, and stability with low overpotential and small Tafel slope in the electrochemical oxygen evolution reaction. This work provides important insights into the design of highly efficient catalysts for optimizing water-splitting systems.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Hao Wu, Zexu Li, Zhichao Wang, Yujie Ma, Sirui Huang, Fan Ding, Fengqi Li, Qingxi Zhai, Yilun Ren, Xiaowen Zheng, Yurong Yang, Shaochun Tang, Yu Deng, Xiangkang Meng
Summary: Introduces a two-step method for preparing medium-entropy metal sulfide nanoparticles. Compared to metal-organic frameworks (MOFs) precursors, medium-entropy metal sulfides exhibit better electrocatalytic performance in oxygen evolution and reduction reactions. Sulfidation leads to the metallic ions possessing higher valence states, as confirmed by electron energy loss spectroscopy (EELS) and X-ray photoelectron spectroscopy (XPS) characterization. Rechargeable zinc-air batteries assembled with the Fe1.2(CoNi)1.8S6 medium-entropy metal sulfide nanoparticles catalyst show superior performances compared to the commercial catalyst (Pt/C+RuO2). The reported fabrication strategy may contribute to fundamental research and industrial applications of medium-entropy materials in rechargeable zinc-air batteries.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Haifeng Bian, Guoli Zhang, Qingxi Zhai, Yanyan Du, Yujie Ma, Beibei Yang, Shaochun Tang, Duan Bin, Xiangkang Meng, Hongbin Lu
Summary: Stainless steel is a potential material for bipolar plates, but faces corrosion issues in acidic environments. Ti3C2Tx is a possible coating for stainless steel bipolar plates, but can lead to galvanic corrosion. A PPY/Ti3C2Tx-AE double-layer coating is designed and prepared on 304SS bipolar plates, showing superior corrosion resistance and long-term stability compared to other coatings. The excellent performance is attributed to barrier and anodic protection effects, as well as a solution to galvanic corrosion. This new coating system provides insights for the design of double-layer coatings for stainless steel bipolar plates.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yilun Ren, Yujie Ma, Biao Wang, Shaozhong Chang, Qingxi Zhai, Hao Wu, Yuming Dai, Yurong Yang, Shaochun Tang, Xiangkang Meng
Summary: Rich p-n junction CoS2/ZnS heterostructures embedded on N-doped carbon nanosheets are fabricated as a continuous and efficient bidirectional catalyst, which can accelerate the conversion of LiPSs and promote the diffusion and decomposition of Li2S, while also possessing strong chemisorption ability to anchor LiPSs and superior affinity for homogeneous Li deposition. The assembled cell with a CoS2/ZnS@PP separator exhibits excellent cycling stability and areal capacity, showing the potential of the catalyst in promoting Li-S chemistry.
Article
Materials Science, Coatings & Films
Haifeng Bian, Yanyan Du, Yilun Ren, Hao Wu, Yujie Ma, Beibei Yang, Shaochun Tang, Duan Bin, Hongbin Lu, Xiangkang Meng
Summary: A PPY/Ti3C2Tx MXene composite coating was synthesized on 304SS BPs by one-step electrodeposition, which showed improved corrosion resistance and stability in simulated PEMFC environment compared to pure PPY coating. The introduction of MXene enhanced the barrier effect, anodic protection effect, adhesion, as well as the conductivity of the coating.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Hao Wu, Zhichao Wang, Zexu Li, Yujie Ma, Fan Ding, Fengqi Li, Haifeng Bian, Qingxi Zhai, Yilun Ren, Yuxuan Shi, Yurong Yang, Yu Deng, Shaochun Tang, Xiangkang Meng
Summary: In this study, low-cost and high-efficiency electrocatalysts Fe-1.2(CoNi)(1.8)Se-x medium-entropy metal selenides (MESes) nanoparticles are successfully prepared via the selenylation of metal-organic frameworks (MOFs) precursors. The optimized Fe-1.2(CoNi)(1.8)Se-6 MESe exhibits outstanding electrocatalytic performance in alkaline media, with low overpotentials of 66 and 216 mV at 10 mA cm(-2) for the hydrogen evolution reaction and oxygen evolution reaction, respectively. A full electrolysis apparatus with Fe-1.2(CoNi)(1.8)Se-6 MESe as both cathode and anode achieves a current density of 10 mA cm(-2) at a potential of 1.55 V. Overall, this strategy of medium-entropy materials provides a low-cost approach to fabricate energy storage and conversion devices.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Biao Wang, Yilun Ren, Yuelei Zhu, Shaowei Chen, Shaozhong Chang, Xiaoya Zhoua, Peng Wanga, Hao Sun, Xiangkang Menga, Shaochun Tanga
Summary: An advanced N-doped carbon microreactor embedded with Co3O4/ZnO heterojunctions is designed as a dual-functional host for optimizing both S cathode and Li metal anode, resulting in excellent cycling stability and high rate capability of Li-S batteries.
Article
Materials Science, Multidisciplinary
Gengjie Wang, Yaoyin Zhang, Shumin Zhang, Pengcheng Liu, Lu Zhu, Zhifu Huang, Zhenhua Cao, Xiangkang Meng
Summary: Adding MgO as a dispersant during chemical vapor deposition prevented the bond formation of Cu powders, thus improving the coverage of graphene on Cu powder and enhancing the mechanical and anti-corrosion properties of the graphene/Cu composite. This method offers a new idea for preparing high strength and high corrosion-resistant graphene/Cu composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Gengjie Wang, Lin Li, Shumin Zhang, Lu Zhu, Yaoyin Zhang, Zhifu Huang, Zhenhua Cao, Xiangkang Meng
Summary: This study investigates the microstructure and substrate temperature dependence of FeCoNiCrCu high-entropy alloy (HEA) coatings on carbon nanotube (CNT) surfaces using experimental and molecular dynamics simulations. The crystal structure of FeCoNiCrCu evolves from amorphous to stacking faults (SFs), multiple-fold twins, and columnar grains as the CNT substrate temperature increases. The formation of SFs and microtwins is induced by mismatch stress at the interface of HEAs and CNT when the CNT substrate temperature is less than 800 K. When the CNT substrate temperature is greater than 800 K, thermal stress induces the formation of multiple-fold twins on the surface of HEAs coating. These findings offer a new method for designing and controlling the interface structure between HEAs and CNTs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Materials Science, Ceramics
Li Jiang, Mianyu Bao, Yanmao Dong, Yan Yuan, Xing Zhou, Xiangkang Meng
Summary: Metallic glass (MG) is a new type of multi-component alloy with a unique disordered atomic stacking structure, which is gradually recognized as a promising anticorrosive material. This review focuses on the current studies and developments concerning corrosion resistant MGs, and provides valuable suggestions for subsequent research.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Nanoscience & Nanotechnology
Gengjie Wang, Lin Li, Shumin Zhang, Lu Zhu, Yaoyin Zhang, Zhifu Huang, Zhenhua Cao, Xiangkang Meng
Summary: A double pulse carbothermal shock process was used to coat the surface of high entropy alloy (HEA) nanoparticles with graphene, solving the problem of their high chemical activity. This improved the feasibility of storage and transportation.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Fengqi Li, Hao Wu, Shaochen Lv, Yujie Ma, Biao Wang, Yilun Ren, Cong Wang, Yuxuan Shi, Hurong Ji, Jian Gu, Shaochun Tang, Xiangkang Meng
Summary: This study successfully fabricated a dual-phase medium-entropy metal sulfide (dp-MEMS) of (FeCoNiMn2)S2, which demonstrates ultra-efficient catalytic activity and surprisingly stability for the oxygen evolution reaction (OER). The coexistence of dual-phase (FCC + HCP) structures effectively inhibits the structure collapse and performance attenuation during OER processes. Density functional theory calculations reveal that the formation of (FeCoNiMn2)S2 dp-MEMS results in the proximity of the d-band center to the Fermi level.