Article
Chemistry, Physical
Fahriye Donmez, Nezihe Ayas
Summary: In this study, Ni/TiO2 catalysts were synthesized using the sol-gel technique and characterized through various methods, while the effects of different factors on hydrogen production performance were investigated. It was found that high hydrogen yield and production rate could be achieved under specific reaction conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Irshad Ahmad, Shazia Shukrullah, Muhammad Yasin Naz, Muhammad Athar Rasheed, Mukhtar Ahmad, Ejaz Ahmed, Muhammad Shoaib Akhtar, N. R. Khalid, Abid Hussain, Sadia Khalid
Summary: Decorating carbon nanotubes onto Sr doped ZnO nanoparticles resulted in a highly efficient photocatalyst for hydrogen evolution under visible light illumination. The improved hydrogen evolution activity of Sr doped ZnO/CNTs is attributed to high surface area, Sr doping, and construction of heterojunction, extending light absorption and improving charge separation. The proposed photocatalytic mechanism is based on Mott-Schottky study, explaining the interfacial charge transfer process from ZnO to CNTs and Sr.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Jitpisut Poolwong, Silvano Del Gobbo, Valerio D'Elia
Summary: Catalytic transesterification of glycerol with dimethyl carbonate using perovskites and perovskite-based mixed metal oxides (PBMMOs) was explored in this study. PBMMOs prepared via non-hydrolytic sol gel method exhibited higher surface areas and stronger basic sites compared to those produced by calcination. The most basic PBMMOs (SrTiO3-200, YNbO4-200, BaCeO3-200) showed the highest catalytic activity, with SrTiO3-200 achieving quantitative conversion of glycerol to glycerol carbonate under optimized conditions.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Environmental
Nhung Thi-Tuyet Hoang, Anh Thi-Kim Tran, Thanh-An Le, D. Duc Nguyen
Summary: The study evaluated the photocatalytic performance of a TiO2-SiO2 film combined with glycerol in degrading methyl orange dye. The optimized conditions resulted in 91% dye removal efficiency, demonstrating the enhanced efficiency of the film in degrading the dye.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Sipei Zhang, Ying Xu, Wen Zhang, Peng Cao
Summary: Cu and Y co-doped TiO2 nanoparticles were prepared using an acid-catalytic sol-gel process, resulting in a single anatase phase with reduced crystallite size. SEM observations showed uniform nanospheres being synthesized under the proposed conditions. XPS results demonstrated the presence of Cu+ and Y3+ ions. The photoactivity of the co-doped TiO2 was improved due to effective separation of electron-hole pairs, increased formation of active radicals, and increased surface area.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Thermodynamics
Jeanina Pandele-Cusu, Simona Petrescu, Silviu Preda, Gabriela Petcu, Madalina Ciobanu, Luminita Predoana
Summary: A comparative thermal analysis study was conducted on TiO2 system using TG/DTG/DTA and DSC. The results showed that microwave-assisted sol-gel method facilitated the amorphous-to-anatase transition in comparison with the sol-gel derived samples. The Ti-Bu-SG sample exhibited the highest photocatalytic activity towards the degradation of methyl orange.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Applied
Juan Carlos Escamilla-Mejia, Jesus Hidalgo-Carrillo, Juan Martin-Gomez, Francisco J. Lopez-Tenllado, Rafael C. Estevez-Toledano, Alberto Marinas, Francisco J. Urbano
Summary: Platinum was incorporated onto titania-mesoporous carbon composite and tested for glycerol photoreforming. The high surface area of the mesoporous carbon promoted the dispersion of titania, while photodeposition led to preferential incorporation of platinum onto titania. The Pt/TiO2-MCH catalyst, with 18.4 wt% titania and 1.3 wt% platinum, showed a hydrogen production three times higher than the Pt/TiO2 catalyst after 12 hours.
Article
Chemistry, Physical
G. Iervolino, V. Vaiano, J. J. Murcia, A. E. Lara, J. S. Hernandez, H. Rojas, J. A. Navio, M. C. Hidalgo
Summary: Platinized mixed oxides were tested for photocatalytic hydrogen production from glycerol solution under UV light. The Ti:Nb ratio, Pt nanoparticle distribution, Pt species formation, and niobia content all played a role in the efficiency of the photocatalyst. Water molecules were confirmed to have an important role in the photocatalytic production of hydrogen in an aqueous glycerol solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
A. Boulahouache, M. Benlembarek, N. Salhi, A. M. Djaballah, Cherifa Rabia, M. Trari
Summary: Perovskite-type LaFeO3 is a successful photocatalyst for H-2 production. Characterization of the prepared material showed a cubic structure with high magnetism, a narrow band gap, and stability in alkaline electrolyte. The photocatalytic activity resulted in optimal H-2 production under visible light irradiation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Applied
Sergio Belda-Marco, Maria Angeles Lillo-Rodenas, Maria Carmen Roman-Martinez
Summary: TiO2-Cu photocatalysts containing different copper species were used for the photoreforming of cellulose in water at room temperature with UV light. Copper was found to have a positive effect, with a mixture of Cu(I) and Cu(II) species favoring the process. Among the catalysts, the one prepared by simple impregnation without heat treatment showed the highest hydrogen production.
Article
Materials Science, Ceramics
Ningna Bai, Xiangchun Liu, Zhengguang Li, Xinyu Ke, Kai Zhang, Qi Wu
Summary: TiO2/ZnO nanocomposites with different Ti/Zn ratios were successfully synthesized by sol-gel and hydrothermal methods, exhibiting excellent photocatalytic performance. The degradation rate of methylene blue by TiO2/ZnO nanocomposites with a Ti/Zn ratio of 2:1 was close to 100%, outperforming other samples. The improved catalytic performance was attributed to the ability to separate holes and electrons.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Charitha Thambiliyagodage, Shanitha Mirihana
Summary: This study successfully synthesized Fe and Cu co-doped TiO2 nanoparticles and investigated their photocatalytic activity. Doping with Fe and Cu can enhance the visible light sensitivity of TiO2, but increasing dopant concentration leads to a decrease in photocatalytic activity.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Marcos Gonzalez-Tejero, Joyce G. Villachica-Llamosas, Alba Ruiz-Aguirre, Gerardo Colon
Summary: Cu/TiO2/SrTiO3 hybrid structures were synthesized by impregnation method from Cu/TiO2 and SrTiO3 systems. The composites effectively covered SrTiO3 with Cu/TiO2, leading to an outstanding improvement of photoactivity for hydrogen production from methanol photoreforming. The optimal 30wt% SrTiO3 heterojunction achieved a photoproduction of 81.7 mmol/g H2 after 6 hours, 1.7 times higher than bare Cu/TiO2.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Ceramics
Jaroslav Cihlar, Lizeth Katherine Tinoco Navarro, Jaroslav Cihlar, Vit Kasparek, Jan Michalicka, Klara Castkova, Istvan Lazar, Jaroslav Kastyl, Ladislav Celko, Michal Vesely, Petr Dzik
Summary: Anatase/brookite nanoparticles were synthesized using low-temperature hydrolysis and polycondensation of titanium isopropoxide in the presence of acetic acid derivatives. The modified acetic acids formed bridges between neighboring titanium species, facilitating their condensation and the formation of Ti-O-Ti bonds. The resulting heterophase junctions between anatase and brookite exhibited high photocatalytic activity for hydrogen production when combined with a Pt cocatalyst. The photocatalysts had a mesoporous structure and large specific surface area, contributing to their high performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
N. V. Besprozvannykh, O. Yu Sinel'shchikova, N. A. Morozov, S. K. Kuchaeva, O. L. Galankina
Summary: This study synthesized complex oxides with hollandite-type structure using the wet chemistry method, and found that ceramics based on these materials showed significantly improved electrical conductivity, making them suitable for hydrogen sensors.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Nurul Tasnim Sahrin, Rab Nawaz, Chong Fai Kait, Siew Ling Lee, Mohd Dzul Hakim Wirzal
Article
Chemistry, Physical
Robabeh Bashiri, Muhammad Syahmi Irfan, Norani Muti Mohamed, Suriati Sufian, Liew Yi Ling, Nur Amirah Suhaimi, Mohamad Fakhrul Ridhwan Samsudin
Summary: The fabrication of SrTiO3@TiO2@Fe2O3 nanorod heterostructure for photocatalytic solar hydrogen production was demonstrated, optimizing the composition of Sr and Fe on the surface. The optimized heterostructure showed improved photoconversion efficiency and high hydrogen production. Manipulation of morphology and energy band alignment greatly influenced the physicochemical and photoelectrochemical properties of the materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Sonam Goyal, Maizatul Shima Shaharun, Ganaga Suriya Jayabal, Chong Fai Kait, Bawadi Abdullah, Lim Jun Wei
Summary: Novel photocatalysts, copper-zirconia imidazolate (CuZrIm) frameworks, were synthesized with different zirconia molar ratios and used for the photoreduction of CO2 to methanol. By optimizing the reaction parameters, the experimental results showed high agreement with the predicted results, indicating the highest methanol activity was achieved under the optimal conditions.
Article
Energy & Fuels
Wan Suzaini Wan Hamzah, Chong Fai Kait, Nurul Asyikin Baharuddin, Asyraf Hanim Abdul Rahim, Khairulazhar Jumbri, Cecilia Devi Wilfred, Zakaria Man, Alamin Idris
Summary: This study aims to optimize the parametric microwave conditions for the catalytic degradation of lignin model compounds, and found that microwave-assisted conversion in imidazolium-based ionic liquids is more promising than conventional methods.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Review
Chemistry, Physical
Krittika Chandran, Chong Fai Kait, Cecilia Devi Wilfred, Hayyiratul Fatimah Mohd Zaid
Summary: Solvents play a crucial role in green chemistry, with deep eutectic solvents (DESs) emerging as a promising new family of ionic fluids. DESs offer advantages such as low cost and environmental friendliness, making them increasingly popular in various research areas, especially in sulfur dioxide gas separation processes.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Multidisciplinary Sciences
Nurashina Abdul Rahman, Anita Ramli, Chong Fai Kait
Summary: In this study, the effects of hydrothermal temperature on TiO2 properties and its photocatalytic activity for biodiesel production from waste cooking oil were investigated. The synthesized catalysts showed a mixture of anatase and rutile phases, with the catalyst prepared at 160 degrees Celsius displaying the highest biodiesel yield.
Review
Biotechnology & Applied Microbiology
Rab Nawaz, Chong Fai Kait, Ho Yeek Chia, Mohamed Hasnain Isa, Lim Wen Huei, Nurul Tasnim Sahrin, Nasrullah Khan
Summary: Recent research interest has focused on developing effective remediation technologies for treated palm oil mill effluent (TPOME). Photocatalytic technology is considered attractive and sustainable, but challenges such as inefficient harvesting of visible/solar light and low remediation efficiency under visible light need to be addressed.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Physical
Farman Ullah, Robabeh Bashiri, Norani Muti Mohamed, Adriana Zaleska-Medynska, Chong Fai Kait, Usman Ghani, Muhammad Umair Shahid, Mohamed Shuaib Mohamed Saheed
Summary: The characteristics of the interface between one-dimensional titanium dioxide (1D TiO2) photoanodes and graphene quantum dots (GQDs) were studied using both density functional theory (DFT) and experimental methods. The results showed that the interface structure significantly enhanced the photocatalytic hydrogen production efficiency, with a five-fold increase in hydrogen production rate. Additionally, a mechanism for photogenerated electron transfer and energy-band-matching at the hybrid interface was proposed.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Rab Nawaz, Chong Fai Kait, Ho Yeek Chia, Mohamed Hasnain Isa, Lim Wen Huei, Nurul Tasnim Sahrin
Summary: This paper reports the synthesis, characterization, and comparative performance of Black-TiO2 and manganese-doped TiO2 (Mn-TiO2) nanoparticles for photocatalytic removal of phenolic compounds from treated palm oil mill effluent (TPOME). Both Black-TiO2 and Mn-TiO2 nanoparticles showed improved visible light absorption and photocatalytic performance compared to Pure-TiO2 nanoparticles. The Mn-TiO2 nanoparticles demonstrated better recyclability with negligible loss of photoactivity after repeated cycles.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Mohd Faridzuan Majid, Hayyiratul Fatimah Mohd Zaid, Chong Fai Kait, Azizan Ahmad, Khairulazhar Jumbri
Summary: This review highlights the characteristics and potential use of ionic liquid incorporated into a metal-organic framework (IL@MOF) as an electrolyte in a lithium-ion battery. The importance of computational methods in investigating the atomistic behavior of IL@MOF and its interaction in electrochemical environments is emphasized.
Article
Chemistry, Physical
Farman Ullah, Norani Muti Mohamed, Chong Fai Kait, Usman Ghani, Mohamed Shuaib Mohamed Saheed
Summary: This study presents a theoretically designed heterogeneous graphene quantum dots (GQD) modified titanium dioxide (TiO2) interface model and investigates its properties using simulation methods. The results show that the addition of GQD can decrease the bandgap energy of TiO2, enhance visible light response, reduce charge recombination rate, and significantly improve photocatalytic performance.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Rab Nawaz, Chong Fai Kait, Ho Yeek Chia, Mohamed Hasnain Isa, Lim Wen Huei, Nurul Tasnim Sahrin, Nasrullah Khan
Summary: The research found that increasing the Ti3+/Ti4+ ratio on the surface of colored TiO2 can significantly enhance visible light absorption and narrow the bandgap, improving photocatalytic performance; when the Ti3+/Ti4+ ratio exceeds 0.134, electron-hole pair recombination accelerates, leading to a decrease in degradation efficiency.
SURFACES AND INTERFACES
(2022)
Proceedings Paper
Nanoscience & Nanotechnology
Sara Maira Mohd Hizam, Nurul Izza Soaid, Mohamed Shuaib Mohamed Saheed, Norani Muti Mohamed, Chong Fai Kait
Summary: The study focused on the electrical conductivity of pyrrole-reduced graphene oxide and found that the conductivity depends on the water hardness, with treated water showing higher conductivity than untreated water. The research suggests that the conductivity of graphene oxide can be tuned by changing the condition of the water sample.
2021 IEEE INTERNATIONAL CONFERENCE ON SENSORS AND NANOTECHNOLOGY (SENNANO)
(2021)
Article
Environmental Sciences
Chiau Yuan Lim, Mohd Faridzuan Majid, Sarrthesvaarni Rajasuriyan, Hayyiratul Fatimah Mohd Zaid, Khairulazhar Jumbri, Fai Kait Chong
Article
Engineering, Chemical
Rab Nawaz, Chong Fai Kait, Ho Yeek Chia, Mohamed Hasnain Isa, Lim Wen Huei
DESALINATION AND WATER TREATMENT
(2020)
