Article
Engineering, Environmental
Alkadevi Verma, Shaili Pal, Jyoti Kuntail, Neha Kamal, R. K. Mandal, Indrajit Sinha
Summary: This study investigates the photocatalytic properties of Cu@Ag and Ag@Cu core-shell nanostructures for the reduction of p-nitrophenol by glycerol under dark and visible light conditions. The Cu@Ag nanoparticles showed significantly enhanced plasmonic photocatalytic activity compared to Ag@Cu nanoparticles. Density functional theory calculations and time-dependent density functional theory simulations were used to understand the electronic structure and mechanism of the core-shell nanostructures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Lokesh Saravanan, Ranjit A. Patil, Pangihutan Gultom, Brajesh Kumar, Arumugam Manikandan, Yen-Pei Fu, Yu-Lun Chueh, Chia-Liang Cheng, Wang-Chi Yeh, Yuan-Ron Ma
Summary: In this study, carbon-shelled titanium dioxide nanowires were successfully synthesized through chemical vapor deposition, with increased oxygen vacancies observed at higher growth temperatures, resulting in enhanced visible light absorption and improved photocatalytic degradation of methylene blue dye.
Article
Chemistry, Inorganic & Nuclear
Yuhan Xie, Boyu Dong, Xuemin Wang, Siyuan Wang, Jinxi Chen, Yongbing Lou
Summary: This study successfully fabricated visible-light-responsive three-dimensional core-shell CoSe2/ZnIn2S4 heterostructures and achieved attractive activity in photocatalytic hydrogen evolution. The presence of CoSe2 improved light absorption and accelerated charge transfer kinetics. The strong interaction between CoSe2 and ZnIn2S4 reduced charge recombination, further enhancing photocatalytic activity for hydrogen evolution.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Physical
Hongyuan Li, Bowen Zhang, Bo Zhang, Hari Bala, Xiangli An, Nian Sha, Zeyu Sun, Wei Zhang, Zhanying Zhang
Summary: All-inorganic perovskite materials with unique photoelectric properties have attracted attention in the field of photocatalysts. However, the poor stability of perovskite quantum dots hinders their practical applications. By coating CsPbBr3 quantum dots with Sn-TiO2, the stability of inorganic perovskite materials is improved. The resulting CsPbBr3/Sn-TiO2 nanocrystals show excellent dispersion and enhanced photocatalytic performance, making them suitable for environmental governance.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Sethumathavan Vadivel, Bappi Paul, Harshavardhan Mohan
Summary: In this study, a one-dimensional iron oxychloride (FeOCl) needles embedded on the surface of Bi5O7Br squares were successfully synthesized to form a core-shell structured FeOCl/Bi5O7Br heterojunction. Various analytical techniques confirmed the successful formation of core-shell FeOCl/Bi5O7Br nanocrystals. The core-shell structure significantly improved visible light absorption and charge separation efficiency, leading to enhanced photocatalytic degradation of tetracycline under visible light.
Article
Environmental Sciences
Khaled Benabbas, Nassira Zabat, Imene Hocini
Summary: A Fe3O4/CuO core-shell heterostructure photocatalyst was successfully synthesized via hydrothermal method, exhibiting excellent photodegradation activity for azo dye Direct Red 89 under visible light irradiation. The catalyst showed enhanced photocatalytic performance compared to pure Fe(3)O(4)or CuO, and maintained high activity even at high dye concentrations. Additionally, the catalyst's paramagnetic property facilitated its recovery and reuse.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Chemical
Lei Wang, Meng Sun, Shan Zhu, Mengzhu Zhang, Yingying Ma, Daxiang Xie, Shuzhen Li, Nchare Mominou, Chunyu Jing
Summary: The study successfully prepared Cu-Ni bimetallic single atoms loaded on TiO2@N-doped porous graphene core-shell materials using a precursor dilution strategy. The catalyst exhibited excellent desulfurization performance with the best activity achieved by the 1 wt% TiO2@Cu/Ni-NG catalyst. Experimental results showed that the desulfurization efficiency remained high even after multiple cycles, demonstrating the potential application prospect of TiO2@Cu/Ni-NG.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Feng Guo, Xiliu Huang, Zhihao Chen, Yuxing Shi, Haoran Sun, Xiaofang Cheng, Weilong Shi, Lizhuang Chen
Summary: The hollow core-shell heterostructure photocatalyst with ZnIn2S4 nanosheets grown in situ on ZnSnO3 cubes achieves efficient photocatalytic hydrogen evolution. The unique structure enhances light absorption, reduces charge transfer path, and provides abundant active sites for promoting photocatalytic water splitting efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Kexin Wei, Andac Armutlulu, Yinxu Wang, Gang Yao, Ruzhen Xie, Bo Lai
Summary: The development of a durable TLFO nanosphere as a heterojunction photocatalyst with PMS has shown efficient removal of ATZ. The TLFO heterojunction demonstrates outstanding herbicidal effects by enhancing charge separation rate and generating reactive oxidant species.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Zhibing Xu, Nian Liu, Qixin Wei, Haijun Liu, Pengfei Zhang, Yi Han
Summary: A facile approach to fabricate Ag3PO4@resin core-shell composite microspheres as visible-light-driven photocatalyst has been successfully established. The composite microspheres showed good potential in degrading methylene blue and phenol under visible light irradiation, while reducing their toxicities to soil microorganisms. The high decoloring efficiency of the prepared microspheres in degrading methylene blue solution highlights their promising application in environmental remediation.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Ziqiang Zheng, Ting Wang, Fang Han, Qing Yang, Benxia Li
Summary: The research developed a three-component Ni/(Au@CdS) core-shell nanostructured photocatalyst, which achieved selective transformation of benzyl alcohol with high yields of hydrogen (H-2) and benzaldehyde. Furthermore, the study revealed the synergistic effect of plasmonic effect and metal cocatalyst in enhancing photocatalysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yi Zhou, Weilong Ouyang, Yuejun Wang, Haiqiang Wang, Zhongbiao Wu
Summary: The study synthesized a core-shell structured MOF@TiO2 as an efficient photocatalyst for toluene degradation, exhibiting a higher degradation rate compared to pristine NH2-UiO-66. The NH2-UiO-66@TiO2 catalyst showed stable performance in repeated reuse experiments and a reactivation after washing with ethanol, with a photocatalytic mechanism involving efficient transfer of photogenerated holes and electrons to produce hydroxyl radicals and oxygen radicals for toluene oxidation. The construction of NH2-UiO-66@TiO2 is considered as an effective approach for the photocatalytic degradation of indoor air pollutants, providing new insights into core-shell structured MOF@photocatalysts design.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Lin Gu, Guozhi Deng, Ruting Huang, Xianyang Shi
Summary: This study improved the catalytic performance of Fe/Ni-MOFs for photocatalytic CO2 reduction using a bimetallic strategy. By synthesizing Fe/Ni-MOFs with a core-shell structure through a single-step approach combined with hydrothermal synthesis, Fe/Ni-T120 was successfully synthesized with efficient photocatalytic CO2 reduction. Fe/Ni-T120 showed high CO evolution rate and CO2 to CO selectivity, broad response range to visible light, high photocurrent intensity, good chemical stability, and strong photocatalytic efficiency. This study proposes a straightforward method for producing adaptable and stable MOFs for effective photocatalytic CO2 reduction driven by visible light.
Article
Chemistry, Physical
Fahime Abedini, Somaiyeh Allahyari, Nader Rahemi
Summary: Different amounts of BiOBr and g-C3N4 were loaded on MCM-41 to achieve efficient photo oxidation and adsorption of DBT. The optimal photocatalyst, BiOBr-C3N4/MCM-41 with 10% BiOBr, showed highest activity and lowest DBT concentration, attributed to the highest structural defects and strongest interaction. However, after four cycles, a decrease in activity was observed due to pores blockage by DBT sulfones.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Masoud Emami Mehr, Hossein Maleki-Ghaleh, Mohadeseh Yarahmadi, Majid Kavanlouei, M. Hossein Siadati
Summary: In this study, core/shell ZnO/TiO2 nanocomposite samples were prepared using the sol-gel method at different time spans. The sample prepared in the 15-minute time span (ZnTi15) exhibited the highest photocatalytic activity and charge carrier density, making it the optimal sample. The formation of a heterojunction at the ZnO/TiO2 interface could be attributed to the increased photocurrent density observed for the ZnTi15 sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Environmental Sciences
Nur Jannah Idris, Suriani Abu Bakar, Azmi Mohamed, Muqoyyanah Muqoyyanah, Mohd Hafiz Dzarfan Othman, Mohamad Hafiz Mamat, Mohd Khairul Ahmad, Muhammad Danang Birowosuto, Tetsuo Soga
Summary: By hybridizing with graphene oxide and multi-walled carbon nanotubes solution, the efficiency of photocatalytic degradation of dyes was improved. Experimental results showed that the composite photocatalyst containing zinc oxide nanorods and titanium dioxide nanorods achieved the highest methylene blue degradation rate under the influence of GO_MWCNTs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Ceramics
Muhamad Kamil Yaakob, Nur Miza Atikah Zulkafli, Muhd Firdaus Kasim, Mohamad Hafiz Mamat, Ahmad Azmin Mohamad, Li Lu, Muhd Zu Azhan Yahya
Summary: This study investigates the structural phase transformation of BiFeO3 thin films under lattice strain effects using the LDA+U method, revealing the sensitivity of crystal structure phases to volumetric and compressive/tensile lattice strain. The computational technique based on first principles calculations is accurate and can aid in the design of new materials with excellent multifunctional responses.
CERAMICS INTERNATIONAL
(2021)
Article
Environmental Sciences
R. Mohamat, A. B. Suriani, A. Mohamed, Muqoyyanah, M. H. D. Othman, R. Rohani, M. H. Mamat, M. K. Ahmad, M. N. Azlan, M. A. Mohamed, M. D. Birowosuto, T. Soga
Summary: Customized surfactants were used to assist in the direct synthesis of graphene oxide, leading to the fabrication of polyvinylidene fluoride nanofiltration membranes with enhanced antifouling properties and water permeability. Higher surfactants' tail number resulted in improved performance of the fabricated membranes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
N. H. Sulimai, M. J. Salifairus, Z. Khusaimi, M. F. Malek, S. Abdullah, Haseeb Khan, Salman Al Rokayan, M. Rusop
Summary: This study successfully synthesized nanostructured calcite thin film using additive-free thermal chemical vapor deposition method, and discussed the influence of deposition temperature on its chemical reaction and composition. The nanostructured calcite thin film deposited at 400 degrees Celsius exhibited a single crystalline phase with a calculated crystallite size of 27.8 nanometers, providing a feasible basis for future applications in fields such as biosensors and photocatalysts.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
M. F. Malek, M. Robaiah, A. B. Suriani, M. H. Mamat, M. K. Ahmad, T. Soga, M. Rusop, S. Abdullah, Z. Khusaimi, M. Aslam, N. A. Asli
Summary: The waste cooking palm oil was utilized as a green carbon source for synthesizing graphene through double thermal chemical vapor deposition. The graphene synthesized at 1000 degrees C showed the highest quality with good crystallinity and hexagonal graphite structure. The presence of the graphene layer on Ni was confirmed by the highest reflectance in the visible light region shown in the UV-Vis result.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Muqoyyanah, A. B. Suriani, A. Mohamed, N. Hashim, M. H. Mamat, M. K. Ahmad, M. H. D. Othman, M. A. Mohamed, M. D. Nurhafizah, M. D. Birowosuto, T. Soga
Summary: The study investigated different titanium dioxide nanostructures and phases for photoanode film in dye-sensitized solar cells. Rutile TiO2 nanorods-microcauliflowers film showed higher energy conversion efficiency and short-circuit current density due to increased dye adsorption and enhanced electron excitation.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Joseph Sartho Immaculate Mercy, Muniyandi Maruthupandi, Mohamad Hafiz Bin Mamat, Nagamalai Vasimalai
Summary: This study presents the in-situ synthesis of polydopamine capped silver nanoparticles (PDA-AgNPs) and their applications as sensors for cysteamine (CYS) and tetracycline (TC) drugs. The PDA-AgNPs were characterized using various techniques, and their detection abilities for CYS and TC were demonstrated through spectrophotometry. The detection limits for CYS and TC were determined to be 180 nM and 17 nM, respectively, with the PDA-AgNPs showing high selectivity and successful detection in serum, urine, and drug samples. Additionally, a paper-based colorimetric kit for on-site monitoring of CYS and TC was developed.
JOURNAL OF CLUSTER SCIENCE
(2022)
Article
Chemistry, Physical
Mohd Faizal Md Nasir, Wan Ramli Wan Daud, Mohamad Hafiz Mamat, Saifollah Abdullah, Mohamad Rusop Mahmood
Summary: Surface-modified zinc ferrite nanocomposites were successfully prepared using kapok fiber as a bio-template through ultrasonic impregnation technique. The ranging ratio of precursors used for bio-templated zinc ferrite catalysts affects their surface structure and subsequently influences the photocurrent density performance in the photoelectrochemical system.
SURFACE AND INTERFACE ANALYSIS
(2021)
Article
Chemistry, Physical
N. A. Asli, N. E. A. Azhar, M. Z. Nurfazianawatie, K. M. Yusoff, H. Omar, N. F. Rosman, N. S. A. Malek, R. Md Akhir, I Buniyamin, M. J. Salifairus, F. S. Husairi, Z. Khusaimi, M. F. Malek, M. Rusop, S. Abdullah
Summary: The study proposed a growth mechanism of vertically aligned carbon nanotubes on a nanostructured porous silicon template based on experimental observations, optimizing the template and synthesis methods to propose different growth mechanism models, providing a foundation for further research.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2022)
Article
Engineering, Multidisciplinary
N. Parimon, M. H. Mamat, A. B. Suriani, A. Mohamed, M. K. Ahmad, I. B. Shameem Banu, N. Vasimalai, M. Rusop
Summary: The novel hematite (alpha-Fe2O3)/nickel oxide (NiO) heterostructures with varying NiO layers exhibited unique surface morphologies and crystal characteristics, with the 3-layer NiO sample showing the highest transmittance and lowest absorbance. Increasing the number of NiO layers was found to impact the lattice structure and optical properties of the heterostructures.
JURNAL TEKNOLOGI-SCIENCES & ENGINEERING
(2021)
Article
Physics, Applied
Abdullah Almohammedi, Yasser A. M. Ismail, Mohd T. Khan, Mohamed Benghanem, Saleh N. Alamri, Tetsuo Soga, Mohamad Rusop
Summary: In this study, a thin film of Sn metal was used as the back electrode for organic solar cells. The effects of post-thermal annealing on the performance parameters of the solar cell and the morphological and electrical properties of the Sn thin films were investigated. The results showed that appropriate post-annealing could improve the performance parameters of the solar cells.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Surulivel Gokul Eswaran, M. A. Ashkar, M. H. Mamat, S. Sahila, Venkataramanan Mahalingam, H. V. S. R. M. Koppisetti, N. Vasimalai
Summary: This work describes the synthesis of sebacic acid capped silver nanoparticles (SA-AgNPs) for detecting L-Histidine in biological samples. The nanoparticles were characterized to be stable spherical particles with a diameter of 11 nm, showing surface plasmon resonance at 420 nm. The addition of L-Histidine induced aggregation of SA-AgNPs, resulting in a color change and reduced SPR band absorbance for detection with a low limit of 122 nM.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Chemistry, Physical
Nur Amirah Jamaluddin, Azmi Mohamed, Suriani Abu Bakar, Tretya Ardyani, Masanobu Sagisaka, Haruka Saito, Mohamad Hafiz Mamat, Mohd Khairul Ahmad, H. P. S. Abdul Khalil, Stephen M. King, Sarah E. Rogers, Julian Eastoe
Summary: The chemical structure of surfactants was further optimized to synthesize high adsorption capacity BMIM-TC14 sEGO/NFC composites for effective dye removal in wastewater treatment, showing superior performance. Various analytical techniques were utilized to investigate the structure and morphology of the composites, providing important insights for the development of novel adsorbents in wastewater treatment.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Sofea Nabila Hazmin, Mohamad Hafiz Mamat, Nur Amalina Muhamad
Summary: Aluminium zinc oxide (AZO) thin film was fabricated using spray pyrolysis, with structural properties characterized by X-Ray Diffraction (XRD) and optical properties examined using UV-Vis-NIR spectrophotometer. The deposition of AZO thin films with different nozzle-substrate distances affects their preferred orientation and optical properties.
4TH INTERNATIONAL SCIENCES, TECHNOLOGY AND ENGINEERING CONFERENCE (ISTEC) 2020: EXPLORING MATERIALS FOR THE FUTURE
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Dayana Kamaruzaman, Norhayati Ahmad, Muhammad Aliff Rosly, Mohamad Hafiz Mamat
Summary: ZnO is considered a material with sufficient feasibility for flexible piezoelectric energy harvesting, offering advantages such as low cost, ease of synthesis, and flexibility. ZnO nanostructures can be applied in various fields, with the power generation mechanism relying on its piezoelectric and semiconducting properties.
4TH INTERNATIONAL SCIENCES, TECHNOLOGY AND ENGINEERING CONFERENCE (ISTEC) 2020: EXPLORING MATERIALS FOR THE FUTURE
(2021)
