Article
Materials Science, Ceramics
M. L. Puga, J. Venturini, W. C. Guaglianoni, T. L. Ruwer, T. B. Wermuth, C. P. Bergmann
Summary: This study successfully synthesized aluminum-doped TiO2 nanotubes via a single-step anodization method, achieving microstructural control by changing the anodization potential and effectively inserting aluminum into the anatase lattice to enhance optical absorption and photoelectrochemical performance.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
O. Zakir, A. Ait-Karra, R. Idouhli, M. Khadiri, B. Dikici, A. Aityoub, A. Abouel, A. Outzourhit
Summary: Titanium dioxide nanotubes (TiO2 NTs) were synthesized by electrochemical anodizing of pure titanium in glycerol-water solution with ammonium fluoride. The properties of the NTs, including diameter and length, were controlled through the anodization time. Characterization techniques like SEM, XPS, XRD, Raman spectroscopy, and EIS were used to analyze the synthesized NTs. The results showed that the internal diameter of the NTs could be adjusted from 30 to 130 nm, while the length increased progressively up to a maximum of approximately 3.32 μm after 90 minutes. XPS analysis confirmed the formation of TiO2 with an oxidation state of +4, and XRD and Raman spectroscopy revealed a mixture of anatase and rutile phases. The TiO2 NTs exhibited n-type semiconductor behavior according to Mott-Schottky analysis. Photocatalytic testing of the TiO2 NTs demonstrated that the length of the NTs had a significant impact on the photocatalytic efficiency, with NTs of 2.55 μm length showing an excellent efficiency of approximately 79.69% with a kinetic rate of 0.0051 min-1. Increasing the solution pH from 3 to 12 resulted in an increase in degradation efficiency from 31.6% to 93.1%.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Environmental Sciences
Yadala Venkata Divyasri, Nagappagari Lakshmana Reddy, Kiyoung Lee, M. Sakar, Vempuluru Navakoteswara Rao, Vemula Venkatramu, Muthukonda Venkatakrishnan Shankar, Nallagondu Chinna Gangi Reddy
Summary: This study optimized nitrogen doping in TiO2 nanotubes to achieve enhanced photocatalytic efficiency for dye degradation and hydrogen production under solar light exposure. By controlling the nitrogen doping concentration, the N-doped TiO2 nanotubes showed efficient photocatalytic performance and stable recyclability.
ENVIRONMENTAL POLLUTION
(2021)
Article
Materials Science, Multidisciplinary
Phuong Dao, Kang Du, Guohua Liu, Gang Li, Muhammad Tayyib, Kaiying Wang
Summary: This study presents the synthesis and photocatalytic properties of Silicon-doped TiO2 nanotubes (TNTs) using the hydrothermal method. The doping level of Silicon was varied within the range of 1-30%, leading to enhanced crystallinity and purity of the anatase phase. The doping also resulted in a redshifted absorption spectra and improved photocatalytic activity.
Article
Nanoscience & Nanotechnology
S. Bhowmick, C. P. Saini, B. Santra, L. Walczak, A. Semisalova, M. Gupta, A. Kanjilal
Summary: The engineering of work function in metal-oxide nanostructures through doping of impurities is complicated due to the introduction of multiple defects. In this study, the modulation of Fermi levels in nitrogen-doped TiO2 nanotubes (TNTs) is investigated for visible-range photocatalytic applications. Nitrogen ions are implanted in TNTs with varying fluence levels, and the effects on the crystalline quality and work function are analyzed using various techniques. The results show that nitrogen ion implantation leads to the formation of electrochemically active states near the conduction band minimum and the valence band maximum, resulting in enhanced visible-light-assisted dye degradation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Sang Yeon Lee, Il -Han Yoo, Ranveer Singh, Young Jae Lee, Shankara S. Kalanur, Hyungtak Seo
Summary: Band structure engineering is employed to enhance photocatalytic properties of TiO2 for H-2 production and dye degradation reactions through fluorine doping, resulting in high energy carriers. Nanoscale imaging reveals insights into the enhanced photocatalytic activity of doped TiO2, particularly in the presence of Ti-F bonding in the sequential doped Pd loaded TiO2 nanorod.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Chunli Wu, Xiaohao Dong, Lan Wang, Lei Zhang, Xiaotong Liu
Summary: The impact of nitric acid on N-TiO2/SiO2 photocatalytic composites was studied, and the optimal nitric acid/butyl titanate volume ratio was found to be 1/6. The synthesized composite showed excellent visible light catalytic activity.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Haichun Xiang, Biyang Tuo, Jinwang Tian, Keming Hu, Jianli Wang, Jiangguo Cheng, Yun Tang
Summary: In this study, Bi-doped TiO2/montmorillonite composites were prepared using the sol-gel method to enhance the photocatalytic treatment of dye wastewater. The results showed that the doping of Bi3+ ions effectively inhibited the recombination of electron-hole pairs, leading to a significant improvement in photocatalytic activity. The highest degradation extent of rhodamine B reached 90.60% under visible-light irradiation when the molar ratio of Bi:Ti was 7%.
Article
Chemistry, Physical
Dawoon Jang, Suyeon Lee, Nam Hee Kwon, Taehoon Kim, Sangjoon Park, Kyung Yeon Jang, Eojin Yoon, Seungjoo Choi, Juheon Han, Tae-Woo Lee, Jeongho Kim, Seong-Ju Hwang, Sungjin Park
Summary: In this work, one-dimensional P-doped carbon nitride nanotubes have been successfully synthesized using supramolecular self-assembly. These nanotubes exhibit great potential as an eco-friendly, visible-light-active photocatalyst for hydrogen evolution reaction. The addition of an ionic liquid improves the uniformity of the nanotubes. Thorough structural and photophysical characterizations reveal that the nanotubes possess larger surface areas, more amine bridges, better crystallinity, and higher visible-light-absorption ability, which contribute to their enhanced photocatalytic performance.
Article
Environmental Sciences
Burak Yuzer, Muhammed Iberia Aydin, Ahmet Hilmi Con, Hatice Inan, Safiye Can, Huseyin Selcuk, Yassine Kadmi
Summary: Cu(II)-doped TiO2 nanoparticles were found to impart self-cleaning and antibacterial properties to cotton fabric, showing significant removal of coffee stains, especially under UV illumination. Additionally, textiles modified with Cu-doped TiO2 NPs exhibited antibacterial activity against E. coli.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Polymer Science
Kyeong-Han Na, Bo-Sung Kim, Han-Sol Yoon, Tae-Hyeob Song, Sung-Wook Kim, Churl-Hee Cho, Won-Youl Choi
Summary: The Fe-doped TiO2 nanofibers prepared through electrospinning and calcination were characterized for their crystal phase, morphology, and photocatalytic performance. The results showed that under both UV and visible light irradiation, the Fe-doped TiO2 nanofibers exhibited excellent photodegradation rates in comparison to the pure TiO2 nanofibers. Further research on Fe dopant concentration control is necessary for improved photocatalytic activity.
Article
Chemistry, Multidisciplinary
Oscar R. Andrade, Veronica Rodriguez, Rafael Camarillo, Fabiola Martinez, Carlos Jimenez, Jesusa Rincon
Summary: The effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles was analyzed in this study. The results showed that the photocatalytic performance of the prepared catalysts was enhanced due to the synergistic effect of N doping and carbon support.
Article
Materials Science, Ceramics
Marcela Sepulveda, Ivan Saldan, Alijani Mahnaz, Veronika Cicmancova, Jan Michalicka, Ludek Hromadko, Roman Bulanek, Hanna Sopha, Jan M. Macak
Summary: For the first time, this study investigated the influence of annealing temperature, crystallinity, and tubular morphology on the photocatalytic decomposition of model organic dye using magnetically guidable anodic TiO2 nanotubes in the form of single tube powders. The powders were prepared from anodic TiO2 nanotube layers grown on Ti by etching, detachment, and annealing in a wide range of temperatures. The best photocatalytic performance was achieved at annealing temperatures of 600 and 700 degrees C for TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders, respectively. The synergistic effects of annealing, crystallite size, and specific surface area enhanced the photocatalytic activity of the powders under UV light.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
T. L. Soundarya, R. Harini, K. Manjunath, B. Udayabhanu, B. Nirmala, G. Nagaraju
Summary: Hydrogen production is crucial in the energy sector, and electrochemical sensing is a sensitive application for trace analyte detection. In this study, Pt-doped TiO2 nanotubes were synthesized and showed superior performance in hydrogen generation, nitrite detection, and supercapacitor applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Rafik Melki, Nadia Aicha Laoufi, Abdelkader Mouheb
Summary: The study investigated the effect of Fe2+ and Fe3+ as TiO2 cocatalysts, with Fe3+ showing higher efficiency due to the production of hydroxyl radicals through an intermediate reaction. TiO2 underwent modification to enhance its structural, optical, and adsorption properties, leading to improved photocatalytic performance. Different Fe ion doping methods were explored, with hydrothermal doping showing promising results in increasing specific surface area and eliminating pollutants. Fe3+ as a cocatalyst may be more effective than as a dopant in certain cases, enhancing TiO2 activity.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Biodiversity Conservation
Yongdong Zhang, Yaling Su, Zhengwen Liu, Yingxun Du, Jinlei Yu, Miao Jin
ECOLOGICAL INDICATORS
(2019)
Article
Environmental Sciences
Yingxun Du, Qiaoying Zhang, Zhengwen Liu, Hu He, Miquel Lurling, Musong Chen, Yunlin Zhang
ENVIRONMENTAL POLLUTION
(2019)
Article
Environmental Sciences
Yongdong Zhang, Jinlei Yu, Yaling Su, Yingxun Du, Zhengwen Liu
Article
Geochemistry & Geophysics
Yongdong Zhang, Jinlei Yu, Yaling Su, Yingxun Du, Zhengwen Liu
ORGANIC GEOCHEMISTRY
(2020)
Article
Engineering, Environmental
Dong Liu, Yingxun Du, Shujie Yu, Juhua Luo, Hongtao Duan
Article
Biodiversity Conservation
Yongdong Zhang, Ting Peng, Yaling Su, Jinlei Yu, Yingxun Du, Zhengwen Liu
ECOLOGICAL INDICATORS
(2020)
Article
Engineering, Environmental
Huacheng Xu, Yani Li, Jin Liu, Haiyan Du, Yingxun Du, Yaling Su, Helong Jiang
Article
Environmental Sciences
YingXun Du, YueHan Lu, J. Alan Roebuck, Dong Liu, FeiZhou Chen, QingFei Zeng, Kang Xiao, Hu He, ZhengWen Liu, YunLin Zhang, Rudolf Jaffe
Summary: The study demonstrates that autochthonous production plays a key role in mediating dissolved organic carbon and chromophoric DOM in lakes, while fluorescent DOM parameters are more sensitive to anthropogenic sources. By combining environmental monitoring with the PLS-PM model, we can better unravel the direct and indirect effects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
ChunYan Luo, ShuaiLong Wen, ShiLin An, YueHan Lu, YingXun Du
Summary: This study investigated the impact of phosphate on the adsorption of different pools of organic matter onto minerals. The results showed that phosphate can alter the chemical composition of organic matter and influence its burial and fractionation at the mineral-water interface.
JOURNAL OF SOILS AND SEDIMENTS
(2021)
Article
Environmental Sciences
YingXun Du, FeiZhou Chen, Kang Xiao, ChunQiao Song, Hu He, QiaoYing Zhang, YongQiang Zhou, Kyoung-Soon Jang, YiBo Zhang, Peng Xing, ZhengWen Liu, YunLin Zhang, YueHan Lu
Summary: The research found that water residence time and mean annual temperature are significant factors influencing the abundance of chromophoric DOM and fluorescent DOM in alpine lakes. Longer water residence time corresponds to DOM with lower molecular intensities, indicating that in-lake DOM processing dominates the regional variability of CDOM and FDOM. These findings suggest that under climate warming and lake enlargement, increased DOM could be processed and removed from Tibetan lakes.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Limnology
YingXun Du, ChunYan Luo, FeiZhou Chen, QiaoYing Zhang, YongQiang Zhou, Kyoung-Soon Jang, YiBo Zhang, ChunQiao Song, YongDong Zhang, YunLin Zhang, YueHan Lu
Summary: This study investigated the quantity and quality of sedimentary organic matter in alpine lakes on the Tibetan Plateau. The results showed that water depth, water transparency, and phosphorus concentration were important factors in regulating the quantity and quality of sedimentary organic matter.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Engineering, Environmental
YingXun Du, ShiLin An, Hu He, ShuaiLong Wen, Peng Xing, HongTao Duan
Summary: This study investigates the role of sediments in the biogeochemical transformation of organic matter during algal blooms in a shallow eutrophic lake in China. The results show that sediments have a significant positive effect on nutrients, metals, phytoplankton, particulate organic matter, and dissolved organic matter. The findings highlight the importance of sediments in the carbon cycle and organic carbon formation.
Article
Environmental Sciences
ShiLin An, ZhenDu Mao, Meilian Chen, XiuLin Huang, LiMei Shi, Peng Xing, LingYang Kong, YongQiang Zhou, YingXun Du, YunLin Zhang
Summary: Alpine lake habitats are transforming into subalpine lakes due to climate change, resulting in increased vegetation. The introduction of terrestrial dissolved organic matter (TDOM) from watershed soil into subalpine lakes undergoes photochemical reactions and can alter the composition of dissolved organic matter (DOM) and affect bacterial communities. In this study, Lake Tiancai was chosen as a typical subalpine lake to investigate the transformation of TDOM through photochemical and microbial processes. The results showed that both processes caused a decrease in dissolved organic carbon and light-absorbing components over 107 days, with the photochemical process promoting chemodiversity. The microbial process had a smaller impact on TDOM transformation compared to the photochemical process. It was also found that light promoted the production of certain molecules associated with Bacteroidota, suggesting a potential influence on bacterial communities. Carboxylic-rich alicyclic molecules were generated in both processes, indicating the conversion of TDOM into a stable pool over time. This study provides insights into the response of high-altitude lakes to climate change in terms of the carbon cycle and lake system structure.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Yingxun Du, Feizhou Chen, Yunlin Zhang, Hu He, Shuailong Wen, Xiulin Huang, Chunqiao Song, Kuanyi Li, Junbo Wang, David Keellings, Yuehan Lu
Summary: The composition of dissolved organic matter (DOM) in lakes is influenced by multiple environmental factors at a continental scale. The study conducted in China's 182 lakes revealed that land cover and societal development have a positive direct effect on the quantity of DOM in lakes. Climate, on the other hand, has both a warming effect on soil organic matter production and export, and an enhancing effect on in-lake transformation of DOM. Three indicators were proposed to assess the influence of biogeochemical drivers on lake DOM across different ecoclimatic zones.
Article
Environmental Sciences
XiuLin Huang, ShiLin An, Shuo Chen, JiaRu Dai, JingJing Liu, ShuaiLong Wen, TingZhen Li, Peng Xing, YingXun Du
Summary: This study investigated the transformation mechanism of algal-dissolved organic matter (ADOM) in natural water. The results showed that the photochemical and microbial processes had different effects on ADOM transformation, with the photochemical process causing more significant changes in certain optical parameters, and the microbial process being more effective in the degradation of DOC and CDOM.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
