Article
Engineering, Civil
Humeyra Bolakar Tosun, Alper Alver, Emine Basturk
Summary: This study investigated the effectiveness of solar photocatalytic asphalt materials in reducing air pollution caused by vehicles. Through experiments, optimum conditions were determined and the efficiency of the material was compared with conventional asphalt pavements. It was concluded that photocatalysts can be functional in solving environmental problems, and solar radiation can be successfully utilized for nitrogen and oxide derivatives removal.
KSCE JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Ji Hye Park, Min Woo Hong, Wathone Oo, Jung Joon Park, Hee Ju Park, Kwang Bok Yi
Summary: TiO2 supported on Ca12Al14O33 (Mayenite) was synthesized and investigated for use as a photocatalytic concrete material. TiO2/Mayenite catalysts exhibited significantly enhanced photocatalytic activities compared to pure TiO2, with the NO removal efficiency increasing up to 10 wt% TiO2 loading and then decreasing. XPS analysis showed that low TiO2 loading TiO2/M catalysts contained Ti-OH on the catalyst surface. The unique crystal structure of Mayenite that supplies oxygen ions and electrons to the TiO2 layer played a critical role in enhancing the photocatalytic activity of the catalyst.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Adrian Pastor, Chunping Chen, Gustavo de Miguel, Francisco Martin, Manuel Cruz-Yusta, Dermot O'Hare, Ivana Pavlovic, Luis Sanchez
Summary: A Eu3+ doped Zn2Al-CO3 based layered double hydroxide (LDH) was developed as a photocatalyst for efficient NOx gas removal under visible light irradiation. The Eu3+ doping induced modifications in the electronic band structure and improved the NOx removal efficiency by 47%. The doped LDHs exhibited long-term photocatalytic stability and high selectivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Amin Mohammadi Nezhad, Amirreza Talaiekhozani, Amin Mojiri, Christian Sonne, Jinwoo Cho, Shahabaldin Rezania, Yasser Vasseghian
Summary: This study analyzed the efficiency of TiO2/MgO photocatalyst nanoparticles in removing ceftriaxone, and compared the results with other methods. The highest removal efficiency of ceftriaxone from synthetic wastewater was found to be 93.7% using TiO2/MgO nano photocatalyst. Future studies should focus on optimizing reactor conditions and improving reactor design for higher removal of ceftriaxone from wastewater.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
D. M. Tobaldi, D. Dvoranova, L. Lajaunie, N. Rozman, B. Figueiredo, M. P. Seabra, A. Sever Skapin, J. J. Calvino, V. Brezova, J. A. Labrincha
Summary: The study successfully coupled titanium dioxide with graphene to enhance the solar photocatalytic activity of the produced materials and assessed the degradation of hazardous air pollutants. The synthesized TiO2/graphene hybrid materials showed exceptional characteristics and a clear enhancement in photocatalytic removal of pollutants, with a degradation rate twice higher than unmodified titania, demonstrating great potential for environmental remediation applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Fugong Qi, Zhenwen Yang, Qiwen Qiu, Ying Wang, Huijun Li
Summary: In this study, molecular dynamics simulation was used to investigate the TiO2/Ti interfacial reaction. The simulation results revealed that a decrease in oxygen concentration in TiO2 and the formation of defective TiO2 occurred after the interfacial reaction. Based on these findings, defective TiO2 with a narrow band gap was successfully synthesized, and its outstanding photocatalytic activity was demonstrated.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Young In Jeon, You Jin Park, Jia Hong Pan, Wan In Lee
Summary: TiO2 microtubes with a pore size of around 1.6 μm were synthesized using a solvothermal reaction without templates, showing slightly lower photocatalytic activities than commercial TiO2 NP under UV-visible light but significantly higher activities under visible light after nitrogen-doping treatment.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Environmental Sciences
Bablu Basumatary, Rajmoni Basumatary, Anjalu Ramchiary, Dimpul Konwar
Summary: Methylene blue degradation in wastewater was achieved effectively through the photocatalytic activity of Ag@TiO2/WO3 nanocomposite, which was prepared by a modified sol-gel precipitation route. The enhanced photocatalytic performance was attributed to reduced bandgap, improved charge carrier transfer efficiency, and plasmonic sensitization of Ag, resulting in a 25 times higher degradation rate compared to commercial DP25 photocatalyst under visible light.
Article
Chemistry, Physical
Jiangpeng Wang, Yaoxun Fang, Wenxuan Zhang, Xuelian Yu, Lin Wang, Yihe Zhang
Summary: The TiO2/BiOBr 2D-2D heterojunction photocatalysts showed excellent photocatalytic nitrogen fixation activity with a maximum NH3 production rate of 1.43 mmol/g/h for the 15% TiO2/BiOBr catalyst, which was about 4 times higher than that of pure BiOBr. The enhanced performance can be attributed to the 2D interface between TiO2 and BiOBr nanosheets, which facilitates the transfer of photogenerated electrons and increases electron participation in the nitrogen fixation reaction. This study highlights the potential of 2D-2D heterojunctions as an effective strategy to enhance solar energy utilization.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Jong Won Lee, Sang Hyuk Lee, Young Il Jang, Hee Mun Park
Summary: The research focused on improving concrete block pavements with added TiO2 to reduce air pollution, and found that the use of NST can enhance the photocatalytic performance of TiO2, leading to a decrease in NO and SO2 concentrations.
Article
Construction & Building Technology
Yong Woo Song, Seong Eun Kim, Yong Gi Jung, Jae Yun Yoo, Jin Chul Park
Summary: The study demonstrates that TiO2 photocatalysts can effectively remove NOx in building ventilation systems, preventing the generation of particulate matter.
BUILDING AND ENVIRONMENT
(2021)
Article
Chemistry, Physical
Mohamed Esmat, Hamza El-Hosainy, Rafat Tahawy, Wipakorn Jevasuwan, Nao Tsunoji, Naoki Fukata, Yusuke Ide
Summary: Introducing oxygen vacancies (Vo) into TiO2 photocatalyst along with N doping is proposed as an alternative strategy for achieving efficient co-catalyst-free solar photocatalytic activity under less extreme conditions. The synthesized material exhibits good co-catalyst-free solar photocatalytic activity for hydrogen evolution via water splitting under irradiation with simulated solar light, showing higher efficiency compared to typical co-catalyst-free defective TiO2 materials. The introduced Vo is believed to play a role in facilitating charge separation and improving photocatalytic efficiency.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Samuel C. Capp, David A. G. Sawtell, Craig E. Banks, Peter J. Kelly, Zaenab Abd-Allah
Summary: The study investigated the effects of combining titanium dioxide with non-thermal plasma, leading to increased ozone and N2O5 production while reducing harmful byproducts like NO2 and N2O. The presence of TiO2 affected plasma chemistry by acting as a sink for atomic oxygen and altering the dielectric constant of the BaTiO3 particulates. Annealing the surface improved TiO2 photocatalytic activity, enabling enhanced ozone and N2O5 formation while decreasing NO2 and N2O production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Hayat Khan, Mohamed Gar Alalm, Marc Lalonde-Lavoie, Marcela Frias Ordonez, Marta Sartirana, Alessia Giordana, Giuseppina Cerrato, Claudia L. Bianchi, Daria Camilla Boffito
Summary: Ce-doped TiO2 showed good performance in the photocatalytic degradation of NOx and ethanol under visible light. Ce0.8T catalyst exhibited the lowest bandgap and the highest degradation rate among all prepared catalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Jong-Won Lee, Cheolmin Baek
Summary: The study evaluated the NOx reduction effect of surface treatment technology for road pavements and the effect of the photocatalytic reaction on asphalt pavements. The use of TiO2 and asphalt rejuvenator helped reduce NOx emissions in asphalt mixtures.
APPLIED SCIENCES-BASEL
(2021)