Article
Nanoscience & Nanotechnology
L. Cano-Casanova, A. Anson-Casaos, J. Hernandez-Ferrer, A. M. Benito, W. K. Maser, N. Garro, M. A. Lillo-Rodenas, M. C. Roman-Martinez
Summary: In this study, a series of nanostructured boron-TiO2 photocatalysts were synthesized and the effects of boron loading and crystallization temperature on their properties and catalytic performance were investigated. The results showed that the presence of boric acid affected the formation of the nanostructure, and the best-performing catalysts had lower boron loading.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Chaehun Lim, Ha-Rim An, Seongmin Ha, Seongjae Myeong, Chung Gi Min, Hea-Jong Chung, Byoungchul Son, Chang-Yeon Kim, Ji-In Park, Hyeran Kim, Hyun Uk Lee, Young-Seak Lee
Summary: We propose an underwater plasma method to produce nanoporous N-doped TiO2 (N-TiO2) photocatalysts with high reactivity in the visible light range. The unique energy input of this technology enables the synthesis, crystallization, doping, and porosity of TiO2 within minutes. The resulting N-TiO2 demonstrates a nanoporous structure with doped N atoms, which leads to narrow bandgap, effective charge-carrier separation, and enhanced light absorbing ability. The N-TiO2 photocatalysts exhibit efficient photocatalytic activities and excellent antibacterial ability, making them suitable for environmental and biomedical applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Qianqian Hu, Yifan Liu, Weian Li, Yanqi Wang, Wenhua Liao, Hanxun Zou, Jianrong Li, Xiaoying Huang
Summary: This study presents a facile and environmentally friendly method for synthesizing C, N co-doped mesoporous TiO2 nanocrystals, using IL-assisted microwave synthesis, resulting in small-sized TiO2 with well-developed mesoporous structure and abundant C, N dopants. The material exhibits high specific-surface area, excellent hydrophilicity, elevated valence-band edges, abundant defect levels, and narrowed band-gap, leading to improved visible-light absorption, reduced photogenerated electron-hole recombination, and rapid charge transfer and surface-catalyzed reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Chuangwei Liu, Derek Hao, Jin Ye, Sheng Ye, Fengling Zhou, Hongbo Xie, Gaowu Qin, Jiating Xu, Jian Liu, Song Li, Chenghua Sun
Summary: The room-temperature nitrogen reduction reaction (NRR) has great importance in the fertilizer industry and fundamental catalysis science. This study demonstrates the knowledge-driven design of boron-doped TiO2 as a photocatalyst for NRR. Among 54 catalysts, boron-doped anatase TiO2(101) is identified as an exceptional NRR catalyst with strong visible-light absorption and excellent reactivity. Experimental validation shows that B-doped TiO2 nanosheet achieves high ammonia production under simulated sunlight, renewing the performance record for Ti-based photocatalysts for NRR. This work highlights the importance of dual active site catalysts for nitrogen activation and reduction and demonstrates the capacity of knowledge-driven catalyst design.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yaoxin Ding, Danni Xue, Hanzhou Yu, Jie Shen
Summary: Mo/N co-doped TiO2 nanotube array films were prepared using magnetron sputtering and anodization. The effects of doping concentration and nanotube morphology on the structure, morphology, elemental composition, light-absorption capacity, and optoelectronic properties of TiO2 nanotubes were investigated. The results showed that Mo primarily incorporated into the TiO2 lattice in the Mo6+ valence state, while N was mainly embedded into the lattice as interstitial atoms. Also, the Mo/N co-doped TiO2 nanotube array films exhibited the best photovoltaic performance with a photogenerated current of 0.50 μA/cm(2), which was 5.5 times higher than that of Mo-doped TiO2. This enhancement in photocatalytic efficiency can be attributed to the increased concentration of photogenerated electrons and holes, reduced band gap width, and intense light absorption within the visible spectrum.
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
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Tao Ke, Shuyi Shen, Krishnamoorthy Rajavel, Kun Yang, Daohui Lin
Summary: A novel hybrid of nitrogen-doped Ti3C2 nanosheets and TiO2 nanoparticles was developed for efficient photocatalysis. The heterojunction between nitrogen-doped Ti3C2 and TiO2, along with the nitrogen doping, played crucial roles in facilitating electron migration and inhibiting electron-hole pair recombination, resulting in enhanced degradation of methylene blue under UV-light.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Valentin G. Bessergenev, Jose F. Mariano, Maria Conceicao Mateus, Joao P. Lourenco, Adwaa Ahmed, Martin Hantusch, Eberhard Burkel, Ana Maria Botelho do Rego
Summary: The dielectric properties and spectral dependence of the photocatalytic constant of Co doped P25 Degussa powder were studied. The research showed a concentration limit for cobalt distribution in the TiO2 matrix before metallic clusters form, and the formation of CoTiO3 phases during annealing at high temperatures. The temperature dependence of the dielectric constant indicated relaxation processes at temperatures below 400 degrees C and Ti-O octahedron reorientation at higher temperatures. The spectral dependency of the photocatalytic constant revealed the presence of electronic states within the energy gap of TiO2 for all nanopowdered samples.
Article
Chemistry, Physical
Bo Yu, Lianhong Zhang, Hongbo Wu, Jie Wen, Arshid Mahmood Ali, Hui Zhang, Guoping Zhang, Mingwei Yu
Summary: The F modification of titanium dioxide was achieved for the first time through a plasma method, resulting in efficient degradation of dyes under visible light.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Engineering, Environmental
Rudzani Ratshiedana, Olayemi Jola Fakayode, Ajay Kumar Mishra, Alex Tawanda Kuvarega
Summary: The study focuses on the impact of silver ion doping on the photocatalytic activity of titanium dioxide for the degradation of tartrazine. Results show that optimal degradation of tartrazine can be achieved with a certain amount of doping, suggesting potential applications for removing similar organic pollutants from water.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Nadiah Sabihah Natar, Nureel Imanina Abdul Ghani, Siti Raihan Hamzah, Muhammad Afiq Rosli, Nur Aien Muhamad, Mohammad Saifulddin Azami, Mohd Azlan Mohd Ishak, Sharin Razak, Wan Izhan Nawawi
Summary: This study investigates the effect of N and Pt co-dopant on the modification of TiO2 photocatalyst and compares different mode preparations. The results show that the NPseq-TiO2 photocatalyst prepared in sequential mode exhibits higher photocatalytic activity than unmodified TiO2 and PNrev-TiO2 photocatalyst. This is attributed to the incorporation of N elements and the formation of oxygen vacancies defects, which enhance the surface properties of the photocatalyst.
Article
Materials Science, Multidisciplinary
Devagi Kanakaraju, Feniellia Diwvya anak Kutiang, Ying Chin Lim, Pei Sean Goh
Summary: This review primarily discusses and evaluates the recent progress in the modification of Ag/TiO2, focusing on co-doping with non-metals and transition metals and the synthesis strategies for engineering the materials. The effects of doping and co-doping on the induced chemical and physical properties, photocatalytic performance, stability, and recyclability aspects are highlighted. The potential improvement of Ag/TiO2 through the addition of green materials is also examined, and recommendations for further research opportunities, limitations, and challenges are suggested.
APPLIED MATERIALS TODAY
(2022)
Article
Environmental Sciences
Amalia Maria Sescu, Lidia Favier, Doina Lutic, Nicolas Soto-Donoso, Gabriela Ciobanu, Maria Harja
Summary: The study demonstrates that the synthesis method affects the photocatalytic activity of TiO2 doped with noble metal catalysts, with samples prepared by incipient wet impregnation showing higher photocatalytic activity. Experimental validation shows that TiO2-Pd/IWI exhibits high photocatalytic stability for the degradation of 2,4-DNP.
Article
Chemistry, Physical
Bo Yu, Lianhong Zhang, Guoping Zhang
Summary: In this study, a C/N co-doped rich-defect TiO2 photocatalyst (C/N/DBD-TiO2-x) was prepared for the first time by DBD plasma discharge treatment in the mixed atmosphere of CO, N2 and H2. The introduction of oxygen defects, C doping and N doping was successfully achieved through DBD plasma discharge treatment. This led to a reduction in the forbidden band width and efficient separation and transfer of electron hole pairs. Additionally, the DBD plasma discharge treatment increased the specific surface area, pore volume and pore size of TiO2. The visible light catalytic performance evaluation showed a degradation rate of 98.05% for MB solution. The new plasma discharge method overcomes the limitations of traditional modification methods, providing a new and more convenient technology for TiO2 modification.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Engineering, Environmental
Katabathini Narasimharao, Ganesh Kumar Reddy Angaru, Zahid Hussain Momin, Shaeel Al-Thabaiti, Mohamed Mokhtar, Abdulmohsen Alsheshri, Sulaiman Yahya Alfaifi, Janardhan Reddy Koduru, Yoon-Young Chang
Summary: In this study, a composite material consisting of orange waste biochar-magnesium silicate (OBMS) was prepared and utilized for the adsorption removal of hexavalent uranium (U(VI)) ions from water. The OBMS composite exhibited high adsorption capacity and stability due to the interaction between U(VI) ions and functional groups presented on the OBMS surface. This low-cost and easily synthesized adsorbent has great potential for the remediation of radioactive U(VI) ions in aquatic environments.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Xuan Gao, Yuhang Dai, Chengyi Zhang, Yixuan Zhang, Wei Zong, Wei Zhang, Ruwei Chen, Jiexin Zhu, Xueying Hu, Mingyue Wang, Ruizhe Chen, Zijuan Du, Fei Guo, Haobo Dong, Yiyang Liu, Hongzhen He, Siyu Zhao, Fangjia Zhao, Jianwei Li, Ivan P. Parkin, Claire J. Carmalt, Guanjie He
Summary: The use of the isotope electrochemical effect (EEI) of water in Zn-ion batteries (ZIBs) electrolyte addresses the challenges of side reactions and gas production. The low diffusion and strong coordination of ions in D2O reduce the possibility of side reactions, resulting in a broader potential window, less pH change, and less zinc hydroxide sulfate (ZHS) generation during cycling. D2O also eliminates different ZHS phases caused by changes in bound water, leading to a stable electrode-electrolyte interface. Full cells with D2O-based electrolyte demonstrate stable cycling performance with high reversible efficiencies and wide voltage windows.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Julie Jalila Kalmoni, Frances L. Heale, Christopher S. Blackman, Ivan P. Parkin, Claire J. Carmalt
Summary: Robust fluorine-free superhydrophobic films were successfully prepared using a mixture of fatty acids, SiO2 nanoparticles, and polydimethylsiloxane. The films exhibited a highly textured morphology, with a water contact angle of 162 +/- 2 degrees and a sliding angle of <5 degrees. The superhydrophobicity of the films remained intact even after exposure to UV light, heat treatment, multiple tape peeling cycles, and various organic solvents.
Article
Chemistry, Physical
Sanjayan Sathasivam, Sapna D. Ponja, Seonghyeok Park, Clara Sanchez-Perez, Christopher Blackman, Ivan P. Parkin, Claire J. Carmalt
Summary: Alternatives to tin-doped indium oxide transparent electrodes are required. Tungsten-doped SnO2 thin films with low resistivities and high electron mobilities were obtained using chemical vapor deposition. The tungsten dopant had minimal distortion to the SnO2 unit cell and resulted in crystallographic preferential orientation in the [200] direction. X-ray photoelectron spectroscopy analysis indicated that tungsten was present in the +5 state, minimizing ionized impurity scattering and achieving high electron mobilities. The tungsten-doped films had an optical band gap of 3.7 eV, making them transparent to visible light.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Mingyue Wang, Raul Quesada-Cabrera, Sanjayan Sathasivam, Matthew O. Blunt, Joanna Borowiec, Claire J. Carmalt
Summary: This study fabricated visible-light-activated iodide-doped BiOBr thin films using aerosol-assisted chemical vapor deposition. The optimized material with 2.7% iodide dopant exhibited the highest photocatalytic performance under 450 nm irradiation, making it an excellent candidate for the photodegradation of volatile organic pollutants.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Shaeel Ahmed Al Thabaiti, Zaheer Khan, Khloud Saeed Al-Thubaiti, Salem Mohamed Bawaked, Soad Zahir Al-Sheheri, Mohamed Mokhtar, Maqsood Ahmad Malik, Katabathini Narasimharao
Summary: Pure Ce0.5Zr0.5O2 and Au (0.1-1.0 wt.%)-deposited Ce0.5Zr0.5O2 nanomaterials were successfully synthesized via hydrothermal and non-aqueous precipitation methods. The synthesized nanostructures exhibited enhanced photocatalytic activity for hydrogen production due to their low band gap and porous character.
Article
Chemistry, Multidisciplinary
Shaeel Ahmed Althabaiti, Zaheer Khan, Katabathini Narasimharao, Salem Mohamed Bawaked, Soad Zahir Al-Sheheri, Mohamed Mokhtar, Maqsood Ahmad Malik
Summary: An Ag-modified TiO2 nanomaterial was synthesized using a one-pot method. The structure and morphology of the synthesized material were determined using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that the addition of metallic Ag nanoparticles decreased the optical band gap and photoluminescence intensity of TiO2, while increasing the Raman peak intensity and absorbance. The Ag-modified TiO2 nanomaterial exhibited higher photocatalytic efficiency than bare TiO2 and Ag metal NPs, attributed to the synergistic effect between Ag metal and TiO2 structures.
Article
Chemistry, Multidisciplinary
Abeer Nasser Al-Romaizan, Salem M. Bawaked, Tamer S. Saleh, Mohamed Mokhtar M. Moustafa
Summary: An efficient, economical, and green synthesis method for fused azines has been developed using Mg-Al hydrotalcite under a high-pressure Q-Tube reactor. This method offers short reaction time, excellent yields, and the ability to reuse the catalyst without losing its catalytic activity for multiple cycles.
APPLIED SCIENCES-BASEL
(2023)
Article
Nanoscience & Nanotechnology
Jiatong Huo, Cesar De Leon Reyes III, Julie Jalila Kalmoni, Seonghyeok Park, Gi Byoung Hwang, Sanjayan Sathasivam, Claire J. Carmalt
Summary: This study demonstrates the fabrication of fluorocarbon-free superhydrophobic coatings using a simple deposition method. The coatings consist of poly(butyl methacrylate) and nanostructured functionalized silica. Instrument measurements confirm the successful formation of the composite and its excellent contact and sliding angles, as well as moderate surface roughness. This research presents an environmentally friendly and efficient method for preparing PBMA-based superhydrophobic coatings.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Shaeel Ahmed Althabaiti, Zaheer Khan, Salem Mohamed Bawaked, Soad Zahir Al-Sheheri, Mohamed Mokhtar, Maqsood Ahmad Malik, Katabathini Narasimharao
Summary: TiO2 nanotubes, Fe3O4-ZnO, and nanocomposites of Fe3O4-ZnO and TiO2 were synthesized by varying the amount of Fe3O4-ZnO. PtOx nanoparticles were then decorated onto the surface of the nanocomposites using a green synthesis method. The synthesized samples were characterized through various spectroscopy and microscopy techniques, revealing strong interaction between Fe3O4-ZnO and TiO2 nanotubes. Deposition of PtOx resulted in a decrease in the bandgap, and Fe3O4-ZnO/TiO2 nanocomposites exhibited higher surface area and pore volume compared to Fe3O4-ZnO sample. The presence of PtOx species inhibited the recombination of e-/h+ pairs, leading to improved photocatalytic H2 production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Ahmad K. K. Badawi, Reda S. S. Salama, Mohamed Mokhtar M. Mostafa
Summary: Industrial wastewater is a major consumer of fresh water and a strong source of pollution. Coagulation-flocculation is an effective technique for removing contaminants from industrial effluents, but the potential of natural coagulants/flocculants (NC/Fs) remains underappreciated. This review explores the feasibility of using natural materials from various sources for industrial effluent treatment and highlights the successful use of magnetic-natural coagulants/flocculants (M-NC/Fs) in diverse industrial effluents. The review also discusses the potential for reprocessing spent materials as a renewable resource and suggests large-scale treatment systems.
Article
Chemistry, Inorganic & Nuclear
Mohamed Mokhtar M. Mostafa, Yining Li, Wael Halawani, Katabathini Narasimharao, Mohamed Abdel Salam, Abdulmohsen A. A. Alshehri, Nezar H. H. Khdary, Sulaiman Al-Faifi, Lin Gu, Abhishek Dutta Chowdhury
Summary: The increased awareness of carbon management has driven the scientific community to develop sustainable catalytic technologies for CO2 conversion. Copper-based multifunctional catalysts are commonly used for thermal hydrogenation and electrocatalytic reduction of CO2. This study synthesized Cu-Zn oxides combined with Al2O3 and ZrO2 through coprecipitation and annealing at different temperatures, revealing that the composition and pretreatment temperature of Cu-Zn oxides significantly affect electrocatalytic CO2 reduction performance. The findings provide insights for designing an efficient catalytic system for CO2 conversion.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Premrudee Promdet, Claire J. Carmalt, Ivan P. Parkin
Summary: ZnGa2O4 and ZnGa2O4-beta-Ga2O3 thin films were prepared using aerosol-assisted chemical vapor deposition. Amorphous ZnGa2O4 and Ga2O3 films were formed initially, and then converted to crystalline zinc gallate and heterostructure zinc gallate films through annealing. The ZnGa2O4-beta-Ga2O3 thin films exhibited enhanced photocatalytic activity due to the formation of type-II band alignment at the interfaces, resulting in improved photoinduced charge separation.
MATERIALS ADVANCES
(2023)
Review
Electrochemistry
Xuan Gao, Haobo Dong, Claire J. Carmalt, Guanjie He
Summary: This paper discusses the challenges of zinc-ion batteries and explores strategies for mitigating side reactions. The importance of further research is emphasized for improving the commercial viability of zinc-ion batteries.
Review
Chemistry, Multidisciplinary
Soumya Kumar Sinha, Pintu Ghosh, Shubhanshu Jain, Siddhartha Maiti, Shaeel A. Al-Thabati, Abdulmohsen Ali Alshehri, Mohamed Mokhtar, Debabrata Maiti
Summary: C-H activation plays a crucial role in the synthetic strategies for multi-step transformations, but its importance lies in its application in large-scale industrial processes and the synthesis of complex natural products. Recent advancements in C-H activation methodologies have led to the discovery of more efficient synthesis methods and accelerated the synthesis of complex organic compounds.
CHEMICAL SOCIETY REVIEWS
(2023)
