Article
Chemistry, Physical
Alejandra Romero-Moran, Jose L. Sanchez-Salas, Joel Molina-Reyes
Summary: The study established the influence of the crystalline phase and agglomeration degree of TiO2 nanoparticles on photocatalytic hydroxyl radical formation and bacterial inactivation in TiO2/SiO2 composite coatings. A relationship between hydroxyl radicals' formation and charge carrier transfer mechanism between defect levels in SiO2 and TiO2 embedded nanoparticles was established through a simple spectroscopic method. This correlation complements the lack of mechanisms behind the photocatalytic activity in TiO2/SiO2 composites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Neslihan Akin, Hacer Mutlu Danaci
Summary: Urban development has a significant impact on the environment, with building materials used in construction affecting both the environment and human health. Nanotechnological building materials offer advantages in environmental impact, but potential drawbacks need further research, especially focusing on titanium dioxide (TiO2). This study investigates building materials containing TiO2 nanoparticles, finding advantages such as self-cleaning and antibacterial properties but also potential risks including pulmonary inflammations, intoxication of the blood-brain barrier, and allergic reactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Tri Rahmawati, Teera Butburee, Weradesh Sangkhun, Tuksadon Wutikhun, Jintara Padchasri, Pinit Kidkhunthod, Siripond Phromma, Tippabust Eksangsri, Wiyong Kangwansupamonkon, Pannee Leeladee, Chaweewan Sapcharoenkun
Summary: This study employed a reducing agent derived from turmeric extract to design a green and cost-effective method for producing silver-doped titanium dioxide (Ag-TiO2) for the photodegradation of methylene blue (MB). The optimal amount of Ag on TiO2 modification resulted in improved visible light absorption and increased photocatalytic efficiency. The 3 %Ag-TiO2 exhibited the highest photocatalytic activity, achieving 80% MB degradation under visible light for 9 hours. This method provides a straightforward and environmentally friendly route for the synthesis of visible-light-active Ag-TiO2 nanoparticles for wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Gustavo Boniatti Helene, Pedro de Souza Ono, Diogo Silva Pellosi
Summary: This study engineered the functionalization of titanium dioxide with silver nanoparticles to create TiO2/AgNP nanocomposites for smart photocatalytic purpose. The results showed that the nanocomposites were more efficient than pure TiO2, with anisotropic AgNPs promoting higher efficiencies. The mechanism evaluation revealed three main routes of photocatalysis, with anisotropic nanostructures corners playing a preferential role. Overall, this research highlights the importance of nanoparticle morphology in the photocatalytic power of TiO2/AgNP nanocomposites.
Review
Environmental Sciences
Nidhi Puri, Anjali Gupta
Summary: Various pesticides and organic compounds generated as a result of rapid industrialization and pharmaceutical companies pose a major threat to the environment. Novel photocatalysts based on zinc oxide and titanium oxide exhibit great potential towards absorption of these organic pollutants from wastewater. However, several limitations like poor affinity, particle agglomeration, high band gap, and recovery issues need to be addressed to enhance their efficiency and make them cost effective and sustainable.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Mairis Iesalnieks, Raivis Eglitis, Talis Juhna, Krisjanis Smits, Andris Sutka
Summary: This study successfully prepared a transparent titanium dioxide coating on plastic substrates and demonstrated its high performance in photocatalytic degradation of organic pollutants. The coating can be applied to polymer substrates and exhibits good stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Min Huang, Shuyi Zhang, Bo Wu, Xing Yu, Yongping Gan, Tiejun Lin, Fei Yu, Yuhan Sun, Liangshu Zhong
Summary: A tunable band structure W-doped TiO2 photocatalyst was designed for the photocatalytic oxidation of methane to C-1 oxygenates using O-2 at low temperature. The W-doping improved the photocatalytic performance, achieving a liquid oxygenates productivity of 12.2 mmol g(-1) and a selectivity of 99.4%. Additionally, the selectivity of COx was effectively decreased from 21.2% to 0.6%. W-doping not only enhanced light absorption but also promoted the separation of photo-generated carriers, improving methane conversion.
Article
Engineering, Environmental
Jing Zhu, Jingyu Wang, You-Peng Chen, Taiping Qing, Peng Zhang, Bo Feng
Summary: This study investigates the adaptive mechanism of bacteria to nanomaterials by analyzing the protein response and phosphorylation modification of bacteria exposed to nTiO(2). The results show that nTiO(2) stimulates iron acquisition, transcription and translation, and biofilm formation in E. coli. It also enhances the resistance of bacteria to antibiotics. Additionally, the use of an iron chelator effectively inhibits the biofilm development of bacteria exposed to nTiO(2). Overall, this work provides new insights into biofouling control and microbial adaptation to nanomaterials.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Environmental Sciences
S. Akash, Baskaran Sivaprakash, Natarajan Rajamohan, C. Muruga Pandiyan, Dai-Viet N. Vo
Summary: The excessive and unorganised utilisation of pesticides have negative impacts on soil and water. Photocatalytic method using nanomaterials shows potential as an alternative for the removal of pesticide pollutants. Specially synthesised nanoparticles have been found to be effective in the photocatalytic treatment of pesticides.
Review
Chemistry, Physical
Alessandro Lavacchi, Marco Bellini, Enrico Berretti, Yanxin Chen, Andrea Marchionni, Hamish Andrew Miller, Francesco Vizza
Summary: In the last two decades, researchers have developed various methods to obtain high surface area nanostructured titanium dioxide, which has been used as electrode supports in electrochemical energy conversion and storage devices. The unique properties of titanium dioxide, including stability, electronic conductivity, and synergistic effects with metal catalysts, make it appealing for these applications. Titanium dioxide nanomaterials can be divided into powders and embedded nanoarchitectures, with a focus on fuel cells, electrolysis, and carbon dioxide electroreduction as the latest applications explored. Further research is needed to support the exploration and utilization of titania in electrocatalysis for energy.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Martina B. Violatto, Giovanni Sitia, Laura Talamini, Annalisa Morelli, Ngoc Lan Tran, Qian Zhang, Atif Masood, Beatriz Pelaz, Indranath Chakraborty, Daxiang Cui, Wolfgang J. Parak, Mario Salmona, Neus G. Bastus, Victor Puntes, Paolo Bigini
Summary: Titanium dioxide nanoparticles (TiO2 NPs) are a major source of human exposure to nanoparticulate matter. Although potential toxic effects have been demonstrated, the correlation between NP properties and their interaction with biological targets is not fully understood. This study prepared engineered TiO2 NPs with different geometries and administered them intravenously in mice. The results showed that the accumulation of TiO2 NPs in organs was low, with a longer-lasting presence in the lungs. Rod-shaped NPs were the most toxic and could induce pulmonary alterations and hepatocellular injury. Small physico-chemical differences dramatically modified accumulation and safety.
Article
Biochemistry & Molecular Biology
Paulina Rokicka-Konieczna, Agata Markowska-Szczupak, Ewelina Kusiak-Nejman, Antoni W. Morawski
Summary: This study presents the characteristics of saccharose-modified TiO2 photocatalysts obtained through a low-temperature hydrothermal method. The influence of these photocatalysts on the survivability and enzyme activity of Escherichia coli and Staphylococcus epidermidis under UV-A and artificial solar light was examined. The TiO2-1%-S-100 photocatalysts were capable of achieving complete inactivation of the bacteria under artificial solar light irradiation in less than 1 hour. The study also discusses the impacts of sugars on the photocatalytic activity and disinfection performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Toxicology
Jun-ichi Akagi, Yasuko Mizuta, Hirotoshi Akane, Takeshi Toyoda, Kumiko Ogawa
Summary: The study found that 6 nm crystalline titanium dioxide nanoparticles are non-toxic and do not cause adverse effects in rats at doses up to 1000 mg/kg bw/day. There was no significant accumulation of titanium in the liver, kidneys, and spleen, and no abnormalities were observed in colonic crypts or DNA strand breaks and chromosomal aberrations.
PARTICLE AND FIBRE TOXICOLOGY
(2023)
Article
Materials Science, Coatings & Films
M. Coto, S. C. Troughton, P. Knight, R. Joshi, R. Francis, R. Kumar, T. W. Clyne
Summary: UV treatments are commonly used for pollutant removal in industrial water. Introducing a suitable photocatalyst can enhance energy efficiency by producing reactive oxygen species to degrade pollutants. TiO2 is a common photocatalyst for UV illumination, often created through Plasma Electrolytic Oxidation (PEO) of titanium substrates. High surface roughness and area on PEO samples enhance photocatalytic activity by disrupting fluid flow and increasing interaction between pollutants and the catalytic surface.
SURFACE & COATINGS TECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Belen Vaz, Moises Perez-Lorenzo
Summary: Porphyrins have been widely used as photosensitizers in the field of photovoltaics and photocatalysis due to their ability to transfer energy from light-collecting areas to reaction centers, similar to natural photosynthesis. However, while solar cell development has led to continuous improvement in the molecular design of these pigments, these innovations have not been efficiently applied to dye-sensitized photocatalysis. This review aims to explore recent advances in the role of porphyrin structural motifs as sensitizers in TiO2-mediated catalysis, providing valuable insights for the development of more efficient photocatalysts.
