Article
Chemistry, Multidisciplinary
Wei Liu, Mengting Li, Weiwei Li, Arturo A. Keller, Vera Slaveykova
Summary: This study investigates the metabolic perturbations in green alga C. reinhardtii exposed to different sizes and concentrations of nTiO(2). The results show that nTiO(2) exposure induces perturbations in amino acid, nucleotide, fatty acid metabolism, among others, but does not affect photosynthesis. The perturbations are size and concentration-dependent and also impact the overall nutrition of the microalgal cell.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Physical
Gagandeep Singh Dhillon, Guoqiang Cao, Nan Yi
Summary: In this study, nickel- and iron-modified titanium dioxide (Ni-Fe/TiO2) catalysts were investigated for the dry reforming of methane (DRM) at 550 degrees C. The addition of Fe was found to decrease the conversion of both CO2 and CH4, and XPS results showed changes in the surface nickel and iron species. Characterization techniques, including TGA and Raman spectroscopy, indicated that Fe addition greatly inhibited coke formation and in situ DRIFTS confirmed the formation of carbonate species, which aided in the removal of deposited coke.
Article
Biochemistry & Molecular Biology
Mozhgan Afshari-Kaveh, Roghayeh Abbasalipourkabir, Alireza Nourian, Nasrin Ziamajidi
Summary: The study showed that vitamin A and E can protect spleen tissues from oxidative stress induced by nTiO2, by reducing oxidative stress levels and increasing antioxidant enzyme activity, maintaining tissue function.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2021)
Article
Chemistry, Applied
Buse Sonmez, Emre Baser, Ozge Yilmaz Gel
Summary: This study aims to increase the photodecolourization efficiency of TiO2 on methylene blue by preparing TiO2 supported zeolite clinoptilolite catalysts. Metal-incorporated co-catalysts showed better performance than TiO2-ZC co-catalysts, with Fe-TiO2-ZC being the most efficient co-catalyst.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
L. G. Vernasqui, A. F. Sardinha, S. S. Oishi, N. G. Ferreira
Summary: This study successfully synthesized high-quality porous boron-doped ultrananocrystalline diamond by pre-treating the substrate using different seeding processes. Analysis of the BDD/B-UNCD films confirmed their quality and nano-scale control, demonstrating the effectiveness of the processes used.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Civil
Yao Li, Huaming Guo, Zhipeng Gao, Tiantian Ke, Zijie Zhu, Yuanyuan Cao, Xiaosi Su, Xiong Wu
Summary: This study explored the behaviour and mobilization mechanism of dissolved phosphorus (P) in a shallow sandy aquifer and a deep sand-gravel aquifer. The results showed that the enrichment of dissolved P in both aquifers was mainly related to organic matter degradation and reduction of Fe(III) oxides. The shallow aquifer had significantly higher total dissolved phosphorus concentrations compared to the deep aquifer, due to the stronger reductive dissolution of Fe(III) oxides with higher P/Fe molar ratio. The study highlights that geogenic enrichment of P in groundwater can occur in sand-gravel aquifers with high P and Fe(III) oxide contents under reducing conditions, and that the P/Fe molar ratio in Fe(III) oxides is the most important controlling factor for dissolved P in groundwater systems.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Environmental
Cheng-Yu Wu, Cam-Hoa Mac, Khanh Nguyen, Shih-Kai Lo, Yen Chang, Po-Liang Lai, Hsing-Wen Sung, Yu-Jung Lin, Tung-Han Yang
Summary: The study explores the use of TiO2 as a photocatalyst for combating tissue inflammation. By utilizing upconversion nanoparticles (UCNPs) and near-infrared (NIR) light, the developed TiO2-based system efficiently produces hydrogen and reduces inflammation by depleting lactate and scavenging reactive oxygen species (ROS) and pro-inflammatory cytokines.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Minming Cui, Segun Adebayo, Gary McPherson, Karen H. Johannesson
Summary: Engineered titanium dioxide nanoparticles have the potential to affect the speciation of molybdenum and tungsten in depositional environments. However, the current accumulation of these nanoparticles in estuarine sediments has a relatively minor impact on trace metal speciation. Nevertheless, increasing accumulations of titanium dioxide nanoparticles may have an impact on oxyanion cycling in the near future.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zhaowang Liu, Yali Feng, Haoran Li, Haosheng Li
Summary: A collaborative utilization process of wastewater and pyrolusite was studied to treat acidic titanium dioxide wastewater, which recovered both titanium and iron and saved sulfuric acid. The process has the advantages of high resource utilization, less pollution, simple operation, and wide application prospect.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Wei-Hsiang Huang, Chin-Jung Lin, Tsung-Han Huang, Chia-Yu Chang, Shu-Chih Haw, Hwo-Shuenn Sheu, Shih-Yun Chen, Chung-Li Dong, Krishna Kumar, Bing Joe Hwang, Wei-Nien Su, Chi-Liang Chen
Summary: In this study, Fe(III) ions were incorporated into TiO2 hollow submicrospheres, which served as an excellent photocatalyst. The experimental parameters such as flow rate, rotation speed, and contaminant concentration were found to improve the catalyst activity. Fe-TiO2 hollow submicrospheres with different Fe wt% were prepared, and it was discovered that 2.5 wt% Fe-TiO2 exhibited the best photocatalyst activity. The Fe(III) doping not only increased the interaction between transition metal (Fe and Ti) 3d orbitals in TiO2, but also promoted the Fe(III)/Fe(II) redox kinetics and the associated photo-Fenton degradation of acetaminophen.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Satya Veer Singh, Urwashi Gupta, Sajal Biring, Bratindranath Mukherjee, Bhola N. Pal
Summary: A nanoscale heterojunction thin film of Cu2S-TiO2 has been grown using sol-gel technique and employed for efficient H-2 production. The photoelectrochemical performance of this Cu2S-TiO2 heterojunction thin film was studied and it showed significantly higher photocurrent compared to previous Cu2S (NP)-TiO2 nanocomposite photoanodes, attributed to reduced carrier recombination at the Cu2S-TiO2 interface.
SURFACES AND INTERFACES
(2022)
Article
Environmental Sciences
Wenjing Xue, Hongdou Liu, Jun Li, Xinyu Chen, Siqi Wen, Jiaming Guo, Xiaoyu Shi, Shan Cao, Yang Gao, Rongzhong Wang, Yiqun Xu
Summary: This study systematically discussed the performance and mechanisms of modified nanoscale zero-valent iron (NZVI) materials for the stabilization of Cd in contaminated river sediments. The results showed that the modified NZVI materials effectively reduced the leachable and extractable Cd concentrations through adsorption, complexation, and precipitation mechanisms. The findings are valuable for the remediation of Cd contaminated river sediments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Lucas Cordeiro, Larissa Muller, Silvana Manske Nunes, Luiza Wilges Kist, Mauricio Reis Bogo, Caroline Pires Ruas, Marcos Gelesky, Wilson Wasielesky, Daniele Fattorini, Francesco Regoli, Jose Maria Monserrat, Juliane Ventura-Lima
Summary: The study found that arsenic induces toxic effects in both tissues of shrimp, and co-exposure to nTiO(2) can enhance these effects and reduce the capacity to metabolize arsenic, leading to the accumulation of more toxic compounds.
DRUG AND CHEMICAL TOXICOLOGY
(2021)
Article
Engineering, Environmental
Xueying Cheng, Renquan Guan, Yunning Chen, Yudan Qian, Qingkun Shang, Yingnan Sun
Summary: In this study, the adsorption and photocatalytic degradation of oxytetracycline (OTC) were investigated using different metal-doped TiO2 nanocatalysts (M-TiO2, M = Fe, Co, Ni, Cr). The effects of different metal dopants on the adsorption and degradation abilities of TiO2 were studied. The photocatalytic performance of Fe-TiO2 was found to be excellent due to the synergy between the separation ability of photogenerated carriers and the adsorption ability of pollutants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Juan Martin-Gomez, Susana Reca-Exposito, Francisco J. Lopez-Tenllado, Jesus Hidalgo-Carrillo, Alberto Marinas, Francisco J. Urbano
Summary: By using plant biotemplating technology, new Fe-TiO2 and Cu-TiO2 photocatalysts were synthesized using olive leaves as biotemplates, achieving replication of leaf structure and improving hydrogen photoproduction efficiency.