Article
Biochemistry & Molecular Biology
Barbora Muzikova, Ivana Martiniakova, Eliska Mikyskova, Martin Mergl, Martin Kalbac, Radek Zouzelka, Jiri Rathousky
Summary: TiO2 is a highly studied photocatalyst due to its non-toxicity, chemical stability, and low cost. However, it has low activity in the visible region. This study focuses on preparing composite photocatalytic materials with altered light absorption properties and evaluates their ability to degrade NO in the gas phase.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2023)
Article
Engineering, Environmental
Lijun Yan, Qing Wang, Wenqiang Qu, Tingting Yan, Hongrui Li, Penglu Wang, Dengsong Zhang
Summary: This study successfully regulated the structure of Pt/TiO2 catalyst through reduction-oxidation treatment, forming Pt/TiO2-C catalyst with a special interface, which can efficiently photocatalytically degrade toluene and exhibit stronger oxidation capacity and mineralization rate.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Mingjing Fang, Longfan Peng, Yunyu Li, Yuxiao Cheng, Lu Zhan
Summary: This study presents a solution to degrade nitrogen oxides emitted by automobile exhausts using Nano-sized titanium dioxide mixed with road pavement coating materials. The degradation effect was evaluated through laboratory tests and statistical analysis. The results show that the pavement coating mixed with Nano-sized titanium dioxide has a good performance in degrading nitrogen oxides, with the degradation effect increasing with the content of Nano-sized titanium dioxide particles. However, there is a peak value in the degradation rate due to the agglomeration phenomenon when adding more Nano-sized titanium dioxide.
Article
Engineering, Environmental
Stepan Nosek, Tomas Duchacek, Pavol Magyar, Jan Prochazka
Summary: In this study, the effectiveness of photocatalytic titanium dioxide (TiO2) coatings in turbulent flow environments, such as street canyons, was investigated. Physical modeling principles were applied to simulate NOx photocatalysis in a polluted street canyon, and the results were compared with experiments in a standard laminar flow reactor (LFR). The study found that the LFR partially simulates photocatalysis in turbulent environments, but with a higher flow rate than recommended. The street canyon experiment showed that the performance of the photocatalyst was spatially dependent due to flow structures, and the removal efficiency was highest at the windward wall and lowest at the leeward wall. These findings provide valuable insights for the development and implementation of photocatalytic coatings in realistic urban pollution scenarios.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Hyeon Jin, Tae Min Lee, Hajin Choi, Kyo-Seon Kim
Summary: In this study, a double-layered photocatalytic mortar was prepared and the effects of various process variables on the photocatalytic conversion of NOX were investigated. The results showed that increasing the concentration of nano-TiO2 and UV-A radiation intensity, as well as decreasing the NOX gas flow rate and relative humidity, can enhance the NOX conversion efficiency. The prepared photocatalytic mortar efficiently converts NOX and provides basic data for its application in infrastructure.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Environmental Studies
Xue Zhang, Hui Li, John T. Harvey, Xiao Liang, Ning Xie, Ming Jia
Summary: This paper developed a photocatalytic water purification pavement coated with nano-TiO2 to improve the water purification performance of porous concrete. The study evaluated the removal rates of three typical pollutants and also examined the skid resistance and durability of the purification effect. Results showed that nano-TiO2 could significantly enhance the removal rates of COD, TP, and NH3-N on roads.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(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
Materials Science, Ceramics
Liudmila Khoroshko, Viktor Borisenko, Petr Baltrukovich, Suvonkul Nurmonov, Olim Ruzimuradov
Summary: Photocatalytically active TiO2 + CuO+Cu2O composite structures have been fabricated on copper foil and pre-oxidized copper grids using a novel one-step sol-gel synthesis. The composites consist of a granular oxide surface layer penetrated by CuO whiskers. X-ray diffraction analysis confirmed the presence of copper oxides (CuO and Cu2O) and titanium dioxide (TiO2) in the anatase phase. The composites displayed high photocatalytic activity for Rhodamine B in aqueous solution under UV-activation. This one-step fabrication method shows promise for improving water and air purification systems.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Ewoud Cosaert, Cedric Wolfs, Stephanie D. Lambert, Geraldine J. Heynderickx, Dirk Poelman
Summary: The study compared the photocatalytic degradation of ethanol on different stable layers on metallic substrates, showing that sol-gel-based TiO2 layers exhibited better photocatalytic activity compared to polymer TiO2 layers. Furthermore, the preparation methods used require minimal photocatalyst, equipment, and allow for easy upscaling.
Article
Environmental Sciences
Yuan-yuan Ren, Cheng Liu, Zhen Cao, Cong-cong Li
Summary: The efficiency, transformation products, and mechanism of phycocyanin removal from water by simulated sunlight/Cu-decorated TiO2 photocatalyst treatment were investigated. The study found that after 360 mins of photocatalytic degradation, over 96% of phycocyanin was removed, and about 47% of dissolved organic nitrogen (DON) converted into NH4+-N, NO3-, and NO2-. The main active species causing degradation was center dot OH, which contributed approximately 55.7% to the phycocyanin degradation efficiency. The degradation process involved the attack of free radicals, leading to the disintegration of chromophore group PCB and apoprotein, and subsequent breakdown of the apoprotein peptide chain into small molecules. This resulted in the release of amino acids and their derivatives into the water. The Cu-TiO2 photocatalyst reduced the formation potential of CHCl3 but increased the production of dichloroacetamide (DCAcAm) and dichloroacetonitrile (DCAN).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Javier Fragoso, Davide Barreca, Lorenzo Bigiani, Alberto Gasparotto, Cinzia Sada, Oleg I. Lebedev, Evgeny Modin, Ivana Pavlovic, Luis Sanchez, Chiara Maccato
Summary: This study presents the use of heterostructures based on beta-Fe2O3 for De-NOx photocatalysis, fabricated by chemical vapor deposition of Fe2O3 and functionalized with CuO or WO3. The modulation of material performance by forming heterostructures enables efficient removal of nitrogen oxides. The improved photoactivity is attributed to matched band edges and increased oxygen defectivity in the target heterostructures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Harjinder Singh, Parteek Singh Thind, Sandeep Singh, Siby John
Summary: Vehicular emissions have a significant impact on urban-environmental pollution. Through experiments, it is found that covering asphalt pavements with titanium dioxide can degrade nitrogen dioxide and sulfur dioxide in the atmosphere. Further analysis shows that vehicular emissions contribute significantly to the NO2 concentration in Chandigarh.
CLEAN-SOIL AIR WATER
(2022)
Article
Construction & Building Technology
Javier Fragoso, Jose Balbuena, Manuel Cruz-Yusta, Ivana Pavlovic, Mercedes Sanchez, Luis Sanchez
Summary: Layer double hydroxide, Zn2Cr-CO3, is used as a photocatalytic additive for removing nitrogen oxides in building mortars. The additive, prepared by the AMOST method (ZnCr-AMO), showed a high NOx removal efficiency of 67%. It was easily scaled up and added to cement-based mortars in different percentages (0.5, 1, and 2 wt%) for DeNOx photocatalytic testing. The results revealed that the DeNOx activities of mortars containing ZnCr-LDH and commercial TiO2 were similar, around 50%, indicating a promising potential for LDH in building materials.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Chemical
Tong Wang, Wenhan Yang, Lu Chang, Hao Wang, Huan Wu, Jinrong Cao, Hua Fan, Jingquan Wang, Haitao Liu, Yunhu Hou, Ru Zhang, Zhimao Yang, Hao Zhu, Chuncai Kong
Summary: This study explored an effective method for removing NO from simulated flue gas at normal temperature using accordion-like MXene-derived TiO2@C/g-C3N4. The combination of photocatalysis and H2O2 oxidation achieved a high removal rate of 94.0% for NO. Furthermore, TiO2@C/g-C3N4 exhibited enhanced performance in accelerating the separation of electron-hole pairs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Myrthe Van Hal, Rui Campos, Silvia Lenaerts, Karolien De Wael, Sammy W. Verbruggen
Summary: Research has shown the potential of photofuel cells for waste water treatment and energy recovery. This study introduces an autonomously operating air purification device for sustainable electricity generation. Experiment results demonstrate that tungsten oxide-based photocatalysts outperform titanium dioxide-based ones in gas-phase PFC operation, achieving high fuel-to-electricity conversion rates.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)