Article
Environmental Sciences
Guy Didier Fanou, Mamadou Traore, Benjamin Kouassi Yao, Andrei Kanaev, Khay Chhor
Summary: A new composite photocatalyst was developed by grafting size-selected 5-nm titanium-oxo-alkoxo nanoparticles onto P25-TiO2 nanoparticles and incorporating HAP obtained by co-precipitation of salts. The photocatalytic yield was increased for the composite photocatalysts with the addition of HAP, likely due to a synergy between adsorption and photo-oxidation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Lixin Song, Xueyang Qi, Wanru Jing, Huizhen Ke, Wei-Hsiang Chen, Jie Xiong
Summary: The flexible nitrogen-doped carbon nanofibrous film, fabricated through electrospinning and annealing treatment, exhibited excellent photocatalytic performance. Nitrogen doping increased the light absorption and charge transfer capability of the film, leading to enhanced photocatalytic activity. The resulting photocatalytic fabric showed good reusability and easy separation from dye solution.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Hongquan Yu, Chenchen Huang, Yue Zhang, Yanbo Wu, Baojiu Chen, Jiashi Sun, Xiangping Li, Jinsu Zhang, Sai Xu, Lihong Cheng, Yong Zhang, Shimin Liu, Hong Zhao
Summary: In this study, well-aligned TiO2 fibers and N-doped TiO2 fibers were prepared using electrospinning technique and combined through calcination methods. The results showed that the N-doped TiO2 fibers exhibited better photocatalytic ability for nitrobenzene degradation under UV light irradiation compared to the pure TiO2 fibers, and both types of fibers demonstrated good photodegradation capability under UV light and visible light irradiation. The photodegradation mechanism of nitrobenzene was also discussed.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Madhavi D. Shete, J. B. Fernandes
Summary: In this study, TiO2 was synthesized using TiCl3, nitrilotriacetic acid, and HNO3. The synthesized TiO2 showed smaller particle size and higher surface area. XRD analysis confirmed the formation of mixed phases in the synthesized TiO2. The dielectric properties of the synthesized TiO2 were investigated for large domain signal frequencies. Compared to Degussa commercial TiO2 (DP-25), the synthesized TiO2 had higher dielectric constant and tangent loss. Point of zero charge (PZC) measurements were conducted to determine the charge on the catalyst surface. Nitrogen doping in the TC sample was confirmed by XPS spectrum. The photocatalytic activity of the synthesized TiO2 was studied using methylene blue dye as a common pollutant under sunlight. The catalyst TC, with nitrogen doping and anatase-rutile mixed phase, exhibited high photocatalytic activity. Nitrogen doping and the presence of a mixed phase inhibited the recombination of photoinduced carriers, thereby increasing the quantum efficiency of the TC photocatalyst.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Chemical
Zhengting Zhang, Guiyun Yi, Peng Li, Xiuxiu Zhang, Haiyang Fan, Xiaodong Wang, Chuanxiang Zhang, Yulong Zhang, Qi Sun
Summary: A novel synergistic cocatalyst (N-CDs/m-TiO2) was successfully synthesized by compounding m-TiO2 with N-CDs, exhibiting significantly enhanced photocatalytic performance. The unique 3D interconnected porous structure not only increased the surface area, but also provided a high density of accessible active sites, facilitating the mass and charge transfer process. The enhanced light absorption ability and reduced energy band gap of N-CDs/m-TiO2, combined with the synergistic effect between N-CDs sensitization and the unique porous structure, contributed to its remarkably improved photocatalytic performance in wastewater purification.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Polymer Science
Byung-Geon Park
Summary: In this study, TiO2 photocatalysts doped with metal ions and nitrogen were prepared using a sol-gel method. The N/Ni/TiO2 showed the highest photocatalytic activity and sterilization efficiency among the samples tested, due to its extended light absorption region and high optical intensity.
Article
Chemistry, Multidisciplinary
Yumatorn Mingmongkol, Dang Trung Tri Trinh, Patcharaporn Phuinthiang, Duangdao Channei, Khakhanang Ratananikom, Auppatham Nakaruk, Wilawan Khanitchaidecha
Summary: In this study, metal-doped titanium dioxide was synthesized to improve photocatalytic degradation and antimicrobial activities. The copper-doped TiO2 nanoparticles showed well-maintained anatase phase and a decreased band gap. The 0.1 wt.% Cu-doped TiO2 exhibited enhanced photocatalytic degradation and antibacterial ability, while the high Cu doping levels had negative impacts on surface charge and charge transfer.
Article
Chemistry, Physical
C. Gomez-Polo, S. Larumbe, A. Gil, D. Munoz, L. Rodriguez Fernandez, L. Fernandez Barquin, A. Garcia-Prieto, M. L. Fdez-Gubieda, A. Muela
Summary: The study investigates the effects of Cr and N doping on the properties of TiO2 anatase nanoparticles, including adsorption capacity, photocatalytic performance, and antibacterial response. Doping with Cr and Cr/N enhances adsorption capacity and photocatalytic performance, with Cr-TiO2 nanoparticles exhibiting antibacterial activity under visible light. The differences in electrostatic charge and nanoparticle dispersion are suggested as the main reasons for the varied antibacterial response among the doped nanoparticles.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Ashok Kumar Chakraborty, Sumon Ganguli, Md Abdus Sabur
Summary: Photocatalysis is a promising technique that uses semiconductor metal oxides under solar energy to mineralize organics in air and water. Nitrogen-doped titanium dioxide (N-TiO2) has attracted attention due to its ability to absorb visible spectrum by lowering the band gap of pristine TiO2. Extensive research has been conducted on the synthesis methods, environmental application, and characterization techniques of N-TiO2.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Guopeng Zhu, Xiutao Yang, Yuxin Liu, Ying Zeng, Tianye Wang, Hongwen Yu
Summary: A brand-new catalyst of C-modified and N-doped TiO2 (T3FN1) was synthesized via the hydro-thermal method using Tetrabutyl titanate (TBOT) and feathers of chicken as the precursor. The catalyst exhibited a unique three-dimensional folded rod-shaped micron structure, thanks to the abundant distribution of TiO2 nanoparticles (anatase phase) around the outer surface of the feathers template. Under visible light illumination for 30 minutes, the degradation rate of TCH reached 89.8% with T3FN1, which was 1.52 times and 2.62 times higher than that of TiO2 without template (T-3) and P25, respectively. Mechanism studies revealed that the chicken feathers served as natural organic templates to enhance the dispersity of TiO2 and nitrogen in feathers was directly doped into TiO2 to improve the catalysts' response to visible light. Furthermore, the carbon in the chicken feathers acted as a transmission medium for electric charges, promoting the spatial separation of photo-induced carriers. Moreover, T3FN1 showed wide adaptability and stability within a pH range, with the degradation rate of TCH still reaching 83.15% after 5 cycles. Overall, due to its unique structure and photocatalytic performance, the catalyst holds great potential for practical wastewater treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Feiyan Lu, Kao Chen, Qingge Feng, Huidong Cai, Dachao Ma, Dongbo Wang, Xiang Li, Chen Zuo, Sinan Wang
Summary: The study focuses on the synthesis of TiO2-based materials for photocatalysis in water treatment, emphasizing the need to address issues related to catalyst separation and carrier recombination. The research introduces a novel magnetical core-shell Fe3O4@SiO2@Sn-TiO2 composite photocatalyst with enhanced performance in tetracycline hydrochloride degradation. Sn2+ doping increases TiO2 content, resulting in improved photocatalytic activity and recyclability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Shuo Zhou, Qiuyan Shen, Feng-Lei Yang, Wenwen Zhan, Xiaojun Wang, Xiguang Han
Summary: A cuboctahedral N-doped carbon-coated CuO/TiO2 p-n heterojunction was designed and fabricated successfully for the first time, demonstrating enhanced transport and separation of photoinduced e-h pairs. The nitrogen-doped carbon coating plays a pivotal role in promoting the overall performance and effectiveness of the reaction. The CuO-TiO2@N-C exhibits superior photocatalytic efficiency, cycle stability and substrate scope towards cross-dehydrogenative coupling reactions.
Article
Engineering, Environmental
Javed Ali Khan, Murtaza Sayed, Noor S. Shah, Sanaullah Khan, Ashfaq Ahmad Khan, Muhammad Sultan, Ammar M. Tighezza, Jibran Iqbal, Grzegorz Boczkaj
Summary: In this study, nitrogen-doped titanium dioxide (N-TiO2) nanoparticles were prepared using a modified sol-gel method, and their optical, structural, and morphological properties were characterized using state-of-the-art techniques. The results showed that nitrogen doping increased the surface area and decreased the bandgap energy of TiO2 nanoparticles, leading to enhanced photocatalytic activity and hydrogen production. This suggests that the visible/N-TiO2 photocatalytic system has economic viability and environmental sustainability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Md. Kamrul Hossain, Md. Mufazzal Hossain, Shamim Akhtar
Summary: TiO2 and Cr-TiO2 nanoparticles were synthesized using the sol-gel method and were found to have photocatalytic activity for the degradation of p-chlorophenol (PCP) under UV irradiation. The degradation efficiency of PCP was highest at the lowest initial concentration and the optimal conditions for TiO2 and Cr-TiO2 NPs were determined to be a catalyst dosage of 2.0 g/L, acidic pH, and UV irradiation for 90 min. The rate constants for the degradation reaction of PCP were found to be 0.0075 and 0.0122 min-1 for pure TiO2 and Cr-TiO2 NPs, respectively.
Article
Engineering, Chemical
Songtao Cao, Yu Zhou, Ruixin Wang, Weizhou Jiao
Summary: A hollow TiO2 composite with an N-doped carbon layer and evenly dispersed Pt nanoparticles on its inner surface was prepared, showing optimized photocatalytic hydrogen production and stability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)