Article
Materials Science, Ceramics
Marcela Sepulveda, Ivan Saldan, Alijani Mahnaz, Veronika Cicmancova, Jan Michalicka, Ludek Hromadko, Roman Bulanek, Hanna Sopha, Jan M. Macak
Summary: For the first time, this study investigated the influence of annealing temperature, crystallinity, and tubular morphology on the photocatalytic decomposition of model organic dye using magnetically guidable anodic TiO2 nanotubes in the form of single tube powders. The powders were prepared from anodic TiO2 nanotube layers grown on Ti by etching, detachment, and annealing in a wide range of temperatures. The best photocatalytic performance was achieved at annealing temperatures of 600 and 700 degrees C for TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders, respectively. The synergistic effects of annealing, crystallite size, and specific surface area enhanced the photocatalytic activity of the powders under UV light.
CERAMICS INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Salih Durdu, Gizem Cihan, Emine Yalcin, Kultigin Cavusoglu, Atilgan Altinkok, Hasan Sagcan, Ilknur Yurtsever, Metin Usta
Summary: To improve the properties of commercial pure titanium for implant applications, Zn-deposited nanotube surfaces were fabricated using anodic oxidation and physical vapor deposition methods. The Zn-deposited surfaces showed hydrophobic character and higher corrosion current density compared to bare titanium surfaces. These surfaces exhibited improved cell viability, ALP activity, and antibacterial properties, with decreased hemolytic activity and protein adsorption. The Zn-deposited nanotube surfaces produced on commercial pure titanium have potential for orthopedic and dental implant applications.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Applied
Adnan Ahmad, Muhammad Amir Khan, Ahsan Nazir, Salman Noshear Arshad, Muhammad Bilal Qadir, Zubair Khaliq, Zuhair Subhani Khan, Aamir Naseem Satti, Bushra Mushtaq, Amir Shahzad
Summary: Metal-oxide based nanostructures with mixed phases and high specific surface area, such as TiO2NF@NT, exhibit excellent performance in photo-degradation applications, especially under UV-light irradiation. The mixed-phase triaxial multifunctional structures could find wide applications in various fields.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Analytical
Tonghao Liu, Rongning Liang, Wei Qin
Summary: Researchers have developed a polymeric membrane ion-selective electrode with excellent anti-fouling and self-cleaning properties through surface covalent modification of an anatase TiO2 coating. The reactive oxygen species produced by photocatalytic TiO2 can kill microorganisms and degrade organic foulants, while a superhydrophilic film prevents foulant adsorption, inhibiting biofouling and organic fouling. Water droplet flow enables complete self-cleaning of residual foulants. This approach shows promise for improving the fouling resistance of other electrochemical or optical membrane sensors and constructing contamination-free sensors.
ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Yinxue Li, Hongru Shang, Yongna Cao, Chunhui Yang, Yujie Feng, Yanling Yu
Summary: An alkali active porous biochar was prepared from corncob xylose residue to remove antibiotics from waste water. The biochar possessed a large specific surface area, developed pore structure, and abundant oxygen functional groups, which resulted in quick and efficient adsorption performance.
Article
Chemistry, Multidisciplinary
Elifnur Gezmis-Yavuz, Tulay Ergon-Can, C. Elif Cansoy, Derya Y. Koseoglu-Imer
Summary: With increasing importance due to decreasing indoor air quality and increased indoor time, the development of new materials for bacteria and viruses has become crucial, especially in the context of the COVID-19 pandemic. This study successfully fabricated HNT-embedded composite nanofiber filters using the electrospinning method, with the incorporation of TiO2 and ZnO nanoparticles. The results showed that the combination of HNTs and photocatalysts improved the filtration efficiency, mechanical properties, and antibacterial properties, making the nanofibers suitable for face masks and air filter materials.
Article
Chemistry, Multidisciplinary
Xinyu Wang, Shengnan Li, Ping Chen, Fengxiang Li, Xiaomin Hu, Tao Hua
Summary: Photocatalysis is studied for its potential to reduce chemical reagent use and energy consumption, while membrane technology combined with microbial, electrochemical, and catalytic processes can help address micro-pollutants and membrane fouling. However, high operating costs limit the practical applications of these technologies.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Environmental Sciences
Xiaotong Gu, Ning Qin, Guangfeng Wei, Yiqiong Hu, Ya-nan Zhang, Guohua Zhao
Summary: The study demonstrates a novel approach for completely removing lowly concentrated phthalic acid esters (PAEs) by utilizing a bi-functional {001}TiO2 surface. Through specific adsorption capability and enhanced oxidation ability, nearly 100% of DMP or DEP can be eliminated within 2 hours of illumination in simulated wastewater, showing significant improvement compared to pure TiO2. In municipal wastewater treatment, {001}TiO2 exhibits 3-6 fold higher removal efficiency for PAEs compared to pure TiO2.
Article
Engineering, Chemical
Xuan Li, Shoaib Anwer, Qiangshun Guan, Baosong Li, Vincent Chan, Giovanni Palmisano, Lianxi Zheng
Summary: This study fabricated an edge-connected MoS2/Au/TiO2 photocatalytic system using a selective photodeposition method and utilized a surface-diffusion mechanism to maximize the synergistic effects among the components. The photocatalytic system exhibited a Z-scheme structure with well separated redox reaction sites, leading to enhanced degradation efficiency and zero-order degradation kinetics for organic pollutants.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Environmental
Xiaohui Wei, Chunlai Wang, Sheng Ding, Kun Yang, Feng Tian, Fan Li
Summary: The silver nanoparticle/carbon dot/TiO2 nanotube array composite synthesized in this study demonstrated enhanced photocatalytic activity, durability, and high efficiency in degrading methylene blue under visible and UV light, making it a promising catalyst for wastewater treatment and environmental remediation applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Xilin Liao, Hai-Tao Ren, Baolei Shen, Jia-Horng Lin, Ching-Wen Lou, Ting -Ting Li
Summary: TiO2 nanofiber membrane with a complete surface microstructure was prepared by doping Zr to regulate the surface microstructure. The doping of Zr effectively improved the tensile strength, catalytic degradation efficiency, and stability of TiO2 nanofibers under simulated sunlight irradiation. Zr doping also limited the surface crack size and grain size of TiO2 nanofibers, enhanced the surface area effect and carrier transfer efficiency, and expanded the visible light response range.
Article
Chemistry, Physical
Zhen-Kun He, Yongxin Lu, Chenxi Zhao, Junjian Zhao, Zhida Gao, Yan-Yan Song
Summary: In this study, highly uniformed spaced TiO2 nanotube arrays were used as a robust ultrathin scaffold and current collector in an electrochemical storage capacitor, leading to the successful construction of an efficient assembled asymmetric supercapacitor. The supercapacitor exhibited high energy density and good cyclic stability in K2SO4 electrolyte.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Hanna Sopha, Zdenek Spotz, Marcela Sepulveda, Mahnaz Alijani, Martin Motola, Ludek Hromadko, Jan M. Macak
Summary: In this study, the crystallization process of TiO2 nanotube (TNT) layers was investigated through in-situ annealing in an XRD chamber. TNT layers of different thicknesses (1, 5, and 20 μm) and morphologies (double wall vs single wall) were annealed with two different annealing rates in the temperature range of room temperature to 500 degrees C. Three different annealing atmospheres (air, N2, and 5%H2/95%N2) were also explored. XRD patterns were measured at every 15 degrees C of the heating ramp, and the crystallite sizes of the anatase phase were calculated using the Scherer equation. The differences in crystallization behavior for different TNT layers and the influence of the annealing atmosphere on 5 μm thick TNT layers are described and discussed.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Timofey P. Savchuk, Ekaterina Kytina, Elizaveta A. Konstantinova, Vladimir G. Kytin, Olga Pinchuk, Andrey K. Tarhanov, Vladimir B. Zaitsev, Tomasz Maniecki
Summary: This study investigates the conversion of carbon dioxide (CO2) into energy-intensive hydrocarbon compounds using TiO2 nanotubes as photocatalysts. The results show that defects, such as Ti3+/oxygen vacancies, are present in single-walled TiO2 nanotubes, while Cu2+ centers and O-2(-) radicals are found in TiO2 nanotube-CuxO composites. The study suggests that TiO2-CuxO nanotube composites hold great promise as photocatalysts for CO2 conversion into hydrocarbon fuel precursors.
Article
Chemistry, Multidisciplinary
Fuao Jia, Hongru Zhou, Min Wang
Summary: Photocatalytic oxidation of bio-polyols is a promising approach for biomass valorization, but achieving selective conversion is challenging. In this study, we demonstrate a selective photocatalytic process to convert bio-polyols into formic acid (FA) or carbon monoxide (CO) by controlling the phase of TiO2. Through the phase control, high selectivity of FA or CO can be achieved from a wide range of bio-polyols. The phase-dependent selectivity is attributed to the difference in the adsorption configuration of FA. This work provides new insights for the design of photocatalytic systems for biomass conversion.
CHEMICAL COMMUNICATIONS
(2023)
Review
Biotechnology & Applied Microbiology
Ve Van Le, Quynh-Giao Tran, So-Ra Ko, Sang-Ah Lee, Hee-Mock Oh, Hee-Sik Kim, Chi-Yong Ahn
Summary: This review summarizes the effects of antibiotic pollution on freshwater microalgae and cyanobacteria, focusing on major biological processes such as photosynthesis, oxidative stress, and macromolecule metabolism. Adaptive mechanisms and antibiotic removal pathways by these organisms are also discussed.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2023)
Article
Psychology, Multidisciplinary
Sangwook Lee, Won-Ki Moon, Jae-Gil Lee, S. Shyam Sundar
Summary: Media systems that personalize their offerings by learning from user activities can enhance user experience when transparency is provided. Users tend to trust and find the system helpful when the machine learning process is explicitly conveyed, regardless of system performance. Privacy concerns were not found to be significant.
COMPUTERS IN HUMAN BEHAVIOR
(2023)
Article
Polymer Science
Di Jiang, Na Chu, Yue Zhang, Wei-Dong Wang, Fan-Long Jin, Soo-Jin Park
Summary: A silane coupling agent was used to modify the surface of expanded graphite, which was subsequently used as a thermally conductive filler to fabricate DGEBA/EG composites with high thermal conductivity. The addition of Si@EG significantly improved the thermal conductivity of the composites, but decreased the impact strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Hao Sun, Seul-Yi Lee, Soo-Jin Park
Summary: Photocatalytic technology is a promising alternative for water treatments, but its practical application is limited by low efficiency and selectivity. In this study, two-dimensional zinc oxide nanosheets decorated with copper-palladium bimetallic nanoparticles were synthesized for the degradation of organic dyes in water. The prepared composites showed superior photocatalytic performance compared to pristine ZnO nanosheets under visible-light irradiation, attributed to enhanced separation and transfer efficiency of charge carriers. The highest catalytic efficiency was achieved by CuPd/ZnO nanocomposite with 0.5 wt% CuPd, achieving 95.3% removal of methyl orange within 45 minutes. This study provides a new avenue for the design and fabrication of high-performance photocatalysts for water treatments.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ilhwan Yu, Vu Thi Quyen, Jaehyoung Ko, Dong Su Lee, Dae-Young Jeon, Yongho Joo
Summary: The research team has developed a method for recycling electronic devices using a water-floating system, which utilizes a water-compatible semiconductor as the active material. The device has high recyclability and stability, and has the potential to become an eco-friendly, cost-effective, and scalable device.
MATERIALS HORIZONS
(2023)
Article
Nursing
Taewha Lee, Su Jeong Lee, Yea Seul Yoon, Hyunju Ji, Sookhee Yoon, SangA Lee, Yoonjung Ji
Summary: This study examines the influence of personal factors and clinical learning environment on the readiness for practice among nursing students. The results show that self-esteem, work-life balance satisfaction, and clinical learning environment significantly affect the readiness for practice. Improving self-esteem and work-life balance satisfaction, as well as providing sufficient educational and clinical support to enhance the clinical learning environment, can help nursing students transition smoothly into real-world practice.
ASIAN NURSING RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Indong Jun, Hyunki Cho, Sebastian E. Amos, Youngjun Choi, Yu Suk Choi, Chang Seon Ryu, Sang-Ah Lee, Dong-Wook Han, Hyung-Seop Han, Ji Hun Yang, Hyun-Woo Jeong, Honghyun Park, Young Jun Kim
Summary: The disruption of thyroid hormones due to chemical exposure is a significant societal problem. Recent breakthroughs in biotechnology have allowed for the evaluation of potential toxicity of chemicals using 3D cell cultures. This study focuses on the interactive effects of thyroid-friendly soft (TS) microspheres on thyroid cell aggregates and evaluates their potential as a reliable toxicity assessment tool.
Article
Multidisciplinary Sciences
Mostafa Vatani, Yasser Zare, Nima Gharib, Kyong Yop Rhee, Soo-Jin Park
Summary: This article introduces a novel model for predicting the efficient conductivity of graphene-polymer systems. Simple equations are used to determine the percolation start, the share of graphene and interphase pieces in the nets. The resistances of tunneling and interphase parts are correlated to graphene conductivity. Experimental data analysis and calculations validate the correctness of the model.
SCIENTIFIC REPORTS
(2023)
Review
Nanoscience & Nanotechnology
Srikanta Palei, G. Murali, Choong-Hee Kim, Insik In, Seul-Yi Lee, Soo-Jin Park
Summary: Perovskite solar cells (PSCs) with a power conversion efficiency of 25.7%, close to the Shockley-Queisser limit, are considered a strong candidate for next-generation energy harvesting. However, stability and reliability issues pose challenges for commercialization. MXenes, as two-dimensional materials, show promise in solar cell applications due to their conductivity, mobility, transparency, tunable work function, and mechanical properties. By using MXenes in different components, PSCs can achieve enhanced conductivity and stability.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jong-Hoon Lee, Seul-Yi Lee, Soo-Jin Park
Summary: In recent years, porous carbon materials have been developed for supercapacitor applications. Carbon aerogels with three-dimensional porous networks are promising for electrochemical energy storage. Physical activation using gaseous carbon dioxide provides controllable and eco-friendly processes, while chemical activation produces wastes. The activated carbon aerogels achieved a high specific surface area and large total pore volumes, leading to a high electrical double-layer capacitance. The specific gravimetric capacitance reached up to 89.1 F g(-1) with a high capacitance retention of 93.2% after 3000 cycles.
Article
Chemistry, Multidisciplinary
Seul-Yi Lee, Yeong-Hun Kim, Roop L. Mahajan, Soo-Jin Park
Summary: In this study, a novel approach to determine the London dispersive components of the surface free energy of ACFs was proposed using inverse gas chromatography. The results showed that our method provides more accurate and reliable values compared to the traditional method, making it a valuable tool for designing interface engineering in adsorption-related applications.
Article
Materials Science, Multidisciplinary
Saurabh Khandelwal, Gyeong Hun Han, Sanghoon Kim, Kyong Yop Rhee
Summary: This study investigates the effect of high-temperature calcination on the thermal and mechanical properties of bentonite clay. It is found that the dehydration and amorphization process of bentonite clay at 800 degrees Celsius can improve the microstructure and thermal stability of basalt epoxy composites, leading to enhanced mechanical performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Vivek Dhand, Jiseok Lim, S. Bharadwaj, Sanghoon Kim, Kyongyop Rhee
Summary: We investigated the synthesis of ternary transition metal boride (TTMB) powders by auto-ignition based sol-gel approach and studied their magnetic property. The TTMB powders obtained showed different crystallinity and magnetic behavior, depending on the boron to metal ratio and the introduction of dysprosium. The TTMB powders can be potentially used in various applications such as sensors, environmental catalysts, radiation shielding, and contrasting agents.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nutrition & Dietetics
Hye-Jin Lee, Hui-Ji Choi, Sang-Ah Lee, Dong Hyuk Baek, Jong Beom Heo, Gyu Yong Song, Wonhwa Lee
Summary: Rare ginsenosides, specifically protopanaxatriol-type, can improve skeletal muscle atrophy by promoting myoblast differentiation and repair, and reducing the expression of muscle atrophy-related molecules.
Article
Nanoscience & Nanotechnology
Anushka Garg, Soumen Basu, Seul-Yi Lee, Roop L. Mahajan, Rajeev Mehta
Summary: This paper investigates the feasibility of synthesizing graphene oxide from coal using a one-pot process with nitric acid. The experiments demonstrate the optimal conditions for bituminous coal and semi-anthracite coal. Various characterization techniques were used to compare the properties of the synthesized graphene oxide with that derived from graphite. The results reveal similarities and differences in surface and structural properties between coal-derived and graphite-derived graphene oxides.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Honggyun Kim, Jamal Aziz, Vijay D. Chavan, Deok-kee Kim
Summary: Silicon nitride films were prepared using plasma enhanced chemical vapor deposition with different trap densities induced by adjusting the RF power ratio. It was found that the film's trap density was lowest under compressive stress and increased under tensile stress. This study has significant implications for the formation of durable nitride films in various electronic and optoelectronic applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Qiang Yu, Huwei Zhao, Yue Zhao
Summary: Zinc oxide thin films and Al-doped zinc oxide films were prepared and characterized in this study. The addition of Al ions was found to change the growth orientation, increase the grain size, and enhance the absorption intensity in the visible light region. Furthermore, the addition of Al ions also increased the forward current in the heterojunction.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Sang Woo Lee, Min Sun Park, Sangwon Wi, So Yeon Lim, Yeseul Lee, Jin-Seok Chung, Sang Mo Yang
Summary: In this study, we investigated the dynamics of domain switching in pristine and fatigued BiFeO3 capacitors through experimental observations and measurements. The results showed that the switching in the pristine capacitors was dominantly driven by domain growth, while the fatigued capacitors exhibited two different switching dynamics, in which nucleation played a critical role.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Boshi Wang, Tianyi Wang, Yufang Liu, Kun Yu
Summary: In this paper, a tunable and anisotropic perfect absorber composed of anisotropic black phosphorus (BP) and isotropic graphene is proposed. The structure exhibits high absorption and strong anisotropic plasma response. The resonance characteristics can be effectively controlled by adjusting geometric parameters and doping levels, offering potential applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaolan Liu, Chunyang Li, Tonghui Yang, Naiqiang Yin, Gangling Zhao
Summary: Water drop triboelectric nanogenerators (WD-TENGs) can harvest energy from raindrops and improve the output performance of TENGs.
CURRENT APPLIED PHYSICS
(2024)
