Article
Materials Science, Multidisciplinary
Salam Hussein Alwan, Karrar Hazim Salem, Hassan Abbas Alshamsi
Summary: In this study, reduced graphene oxide coated titanium dioxide nanocomposites were prepared through a hydrothermal synthetic route. The nanocomposites were found to have good photocatalytic activity for Rhodamine B dye degradation. The composition, optical activity, morphology, and porosity of the nanomaterials were characterized using various techniques. The results showed that the nanocomposites exhibited high efficiency in photocatalytic degradation of the dye.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Elias Assayehegn, Abraha Tadese Gidey, Gebrehiwot Gebreslassie, Gebremedhin Gebremariam, Ananthakumar Solaiappan, Yonas Chebude, Esayas Alemayehu
Summary: This study successfully prepared N-doped titanium dioxide nanocrystals using a benign N-source. The annealing gas environment was found to significantly impact the crystal structure, optical properties, and photocatalytic activity of the N-TiO2 nanocrystals. The introduction of N led to improved photocatalytic performance, with the highest degradation performance achieved in air. The gas-driven synthesis of photocatalysts has practical applications in solar energy conversion systems.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Zhangwen Xie, Jun Yang, Kai Wang, Qingnan Meng, Yufei Tang, Kang Zhao
Summary: This study successfully prepared TiO2-SiO2-C composite with anatase/rutile heterostructure by a simple treatment method. The composite showed the best photocatalytic performance, mainly due to its lowest band gap and the enhanced sensitization of H(2)O(2;)by oxygen vacancies.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Purnesh Chattopadhyay, Maria Camila Ariza-Tarazona, Erika Iveth Cedillo-Gonzalez, Cristina Siligardi, Juliane Simmchen
Summary: Microplastics pose a significant environmental threat, compounded by the lack of efficient removal techniques. Photocatalytic semiconducting nanoparticles show promise in degrading micropollutants, including microplastics. This study presents a novel approach by integrating self-propulsion, phoretic assembly, and photocatalytic oxidation into a single Pac-Man TiO2 micromotor, allowing for active collection and degradation of microplastics. The experiments focus on polystyrene microspheres as model microplastics, correlating degradation with catalytic activity and evaluating timescales for the involved processes.
Article
Multidisciplinary Sciences
Enyang Liu, Xiaojian Bi
Summary: TiO2 nanotube arrays were prepared by anodization and their crystal structure was modified through calcination at different temperatures. The photocatalytic activity of the samples was evaluated by the degradation of rhodamine B under visible light. TiO2 nanotubes calcined at 600°C exhibited superior photocatalytic performance compared to other samples. Various characterization techniques were employed to study the catalyst, including X-ray diffraction, scanning electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, Raman spectroscopy, photoluminescence spectroscopy, and electrochemical testing. The improvement in catalytic activity was attributed to changes in crystal structure, surface morphology, and photoelectric properties, with the presence of anatase and rutile phases at 600°C calcination. The enhanced absorption of visible light, reduced charge transfer resistance, and suppressed electron-hole recombination were identified as contributing factors. It was also determined that h+ and •OH played key roles in the catalytic process.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2023)
Article
Chemistry, Physical
Zhongli Zhou, Hang Yin, Yuling Zhao, Jianmin Zhang, Yahui Li, Jinshi Yuan, Jie Tang, Fengyun Wang
Summary: By controlling the phosphate concentration, the recombination rate of electron-hole pairs can be reduced to enhance photocatalytic performance. The heterojunction between alpha-Fe2O3 and RT in the hollow nanospheres leads to excellent photocatalysis under visible light, significantly improving the degradation rate of rhodamine B.
Article
Green & Sustainable Science & Technology
Dong Xu, Hailing Ma
Summary: In this study, degradation of Rhodamine B in water by ultrasound-assisted TiO2 photocatalysis was investigated, and the optimal degradation conditions were determined by studying various factors. The results suggest that the ultrasound-assisted TiO2 photocatalysis method has great potential application value in the removal of organic pollution and environmental purification.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Nanoscience & Nanotechnology
Pin Lyu, Jian Zhu, Chongchong Han, Lei Qiang, Linlin Zhang, Bingbao Mei, Jiehong He, Xiaoyan Liu, Zhenfeng Bian, Hexing Li
Summary: The novel method introduces a way to activate O-2 spontaneously through interfacial oxygen vacancies on carbon-coated TiO2-x, generating reactive oxygen species with versatile applications. The reactive oxygen species exhibit excellent performance in oxidation reactions and inhibition of MCF-7 cancer cells, providing new insight into the effective utilization of O-2 via oxygen vacancies on metal oxides.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Bing Fu, Zhijiao Wu, Kai Guo, Lingyu Piao
Summary: A simple and environmentally friendly synthetic method was developed to synthesize regulable reductive and oxidative facets of rutile TiO2 single crystals. Sodium fluoride and glycolic acid played crucial roles in this process, serving as effective phase and facet controlling agents.
Article
Materials Science, Multidisciplinary
Tong Mou, Verena Kristin Gupta, Meisam Farzalipour Tabriz, Thomas Frauenheim, Peter Deak
Summary: Small electron polarons were detected in rutile-TiO2 experiments, while only large ones were found in anatase. However, using an accurate hybrid functional, it was shown that the large polaron in anatase is actually of medium size and can be obtained in a static calculation. These states are two-dimensional in the (001) plane and can get trapped at the (101) surface, similar to the existence of small polarons. The calculated binding energy and the simulated scanning tunneling microscopic image matched well with experimental observations. The efficient separation of photoexcited carriers due to trapping of holes in small polaron states in the bulk and the presence of electrons only at the surface contribute to the excellent photocatalytic behavior of anatase.
Article
Chemistry, Physical
Imane Ellouzi, Abdessalam Bouddouch, Bahcine Bakiz, Abdeljalil Benlhachemi, Hicham Abou Oualid
Summary: In this study, Silver-doped TiO2 composites with varying loading levels were prepared using glucose-assisted ball-milling. Characterization techniques including electron microscopy and X-ray diffraction were used to analyze the morphology and phases of the composites. The results showed that the photocatalytic degradation of Rhodamine B was most effective when using TiO2 doped with 3% of Ag, indicating an enhancement in performance with silver doping.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
N. K. Pandey, H. B. Li, L. Chudal, B. Bui, E. Amador, M. B. Zhang, H. M. Yu, M. L. Chen, X. Luo, W. Chen
Summary: Copper-cysteamine nanoparticles can produce reactive oxygen species for cancer and infectious disease treatments, as well as serve as an effective catalyst for wastewater treatment. This study demonstrates the use of Cu-Cy NPs with H2O2 in the oxidative degradation of organic contaminants, showing enhanced degradation rate with microwave activation and good stability and recyclability. The Cu-Cy/H2O2 system studied here shows potential for advanced oxidation processes in degrading organic pollutants.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Dong Liu, Chunling Li, Congyue Zhao, Er Nie, Jianqiao Wang, Jun Zhou, Qian Zhao
Summary: In this study, a highly efficient Bi-doped TiO2 photoanode was fabricated, which exhibited excellent stability and degradation performance under visible light irradiation. The enhanced visible light absorption and decreased charge recombination rate contributed to its superior photocatalytic properties.
Article
Materials Science, Ceramics
Xueyuan Wang, Lihong Bao, Jun Wang, Xiaojian Pan, TaNa Bao, Luo Meng Chao, Juming Liu, Zizhong Liu
Summary: In this study, a novel TaB2@TiO2 heterostructure was successfully constructed by a facile sol-gel method. The TaB2@TiO2 heterojunction exhibited suitable work function and B-O bonds at the interface, facilitating the migration of photogenerated carriers. The metallic nanocrystalline TaB2 also increased the specific surface area, leading to improved photocatalytic degradation performance compared to pristine TiO2 and commercial TiO2 (P25).
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Junming Zhang, Jun Ma, Tej S. Choksi, Daojin Zhou, Shaobo Han, Yen-Fa Liao, Hong Bin Yang, Dong Liu, Zhiping Zeng, Wei Liu, Xiaoming Sun, Tianyu Zhang, Bin Liu
Summary: Noble metals play a crucial role in electrochemical reactions, but their usage is limited due to high overpotential and poor stability. By modulating strong metal-support interaction (SMSI) through mechanical milling, the overall performance of Pd electrocatalysts has been improved in terms of activity, selectivity, and stability. This approach can also be extended to other noble metal systems, showing great promise for the large-scale production of highly stable and tunable electrocatalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Biomedical
Erik Unosson, Daniel Rodriguez, Ken Welch, Hakan Engqvist
ACTA BIOMATERIALIA
(2015)
Article
Engineering, Biomedical
Erik Unosson, Matthias Morgenstern, Hakan Engqvist, Ken Welch
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2016)
Article
Materials Science, Ceramics
Le Fu, Chengtie Wu, Kathryn Grandfield, Erik Unosson, Jiang Chang, Hakan Engqyist, Wei Xia
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2016)
Article
Chemistry, Physical
Erik Unosson, Ken Welch, Cecilia Persson, Hakan Engqvist
APPLIED SURFACE SCIENCE
(2013)
Article
Engineering, Biomedical
Alejandro Lopez, Erik Unosson, Hakan Engqvist, Cecilia Persson
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2011)
Article
Engineering, Biomedical
Erik Unosson, Cecilia Persson, Ken Welch, Hakan Engqvist
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2012)
Article
Materials Science, Ceramics
Cecilia Persson, Erik Unosson, Ingrid Ajaxon, Johanna Engstrand, Hakan Engqvist, Wei Xia
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2012)
Article
Materials Science, Biomaterials
Camilla Berg, Erik Unosson, Hakan Engqvist, Wei Xia
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2020)
Article
Materials Science, Ceramics
Camilla Berg, Erik Unosson, Lars Riekehr, Wei Xia, Hakan Engqvist
CERAMICS INTERNATIONAL
(2020)
Article
Dentistry, Oral Surgery & Medicine
Erik Unosson, Yanling Cai, Xiyuan Jiang, Jesper Loof, Ken Welch, Haan Engqvist
INTERNATIONAL JOURNAL OF DENTISTRY
(2012)
Article
Dentistry, Oral Surgery & Medicine
Chang Zeng, Pei Hu, Colin P. Egan, Brian E. Bergeron, Franklin Tay, Jingzhi Ma
Summary: The study compared the bacteria debridement efficacy of the first and second generations of sonic root canal irrigant activation systems. The results showed that activation of 2% NaOCl with either EndoActivator or SmartLite Pro EndoActivator significantly reduced the overall intracanal bacterial load compared to syringe-side-vented needle delivery. However, delivering 2% NaOCl for 5 minutes using the syringe-side-vented needle produced better bacteria debridement than either sonic agitation system.
JOURNAL OF DENTISTRY
(2024)
Article
Dentistry, Oral Surgery & Medicine
Alaa Husni Qari, Raghad Mohammed Alharbi, Shahd Saud Alomiri, Banan Nasser Alandanusi, Lina Ayman Mirza, Mohammad Hasan Al-Harthy
Summary: The study compares the experience of patients seen using teledentistry with traditional Orofacial Pain and TMD visits. Results indicated a borderline difference in effectively using teledentistry for follow-ups among different age groups, but no significant differences were found in patients' experience between virtual and conventional visits. This suggests that high-quality dental care services can be provided remotely without adversely affecting patient experience or quality of care.
JOURNAL OF DENTISTRY
(2024)
Article
Dentistry, Oral Surgery & Medicine
Giovanna Iezzi, Barbara Zavan, Morena Petrini, Letizia Ferroni, Tania Vanessa Pierfelice, Ugo D'Amora, Alfredo Ronca, Emira D'Amico, Carlo Mangano
Summary: This study characterized the surface topography and evaluated the biological responses of various cells to a novel 3D-printed dental implant. The surface of the implant showed a highly interconnected porous architecture and roughness, leading to good adhesion and growth of human oral osteoblasts, gingival fibroblasts, mesenchymal stem cells, and monocytes. These findings suggest that this 3D-printed implant has excellent potential for clinical applications.
JOURNAL OF DENTISTRY
(2024)