Article
Engineering, Environmental
Yeonjoon Kim, Mohammed A. Jabed, David M. Price, Dmitri Kilin, Seonah Kim
Summary: This study provides rational design guidelines for supported V2O5 catalysts in the catalytic upgrading of lignocellulosic biomass, particularly in the conversion of guaiacol to phenol. The tilt angle of the aryl group in the hydrogen migration transition state is identified as a key descriptor in determining the catalytic activity of phenol formation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Zhongwen Luo, Jiahan Xie, Nicholas Kaylor, Diane A. Dickie, Hannah E. Ketcham, Robert J. Davis, T. Brent Gunnoe
Summary: Silica-supported Pd, Rh, and Pt metal nanoparticles catalyze the hydrogenolysis of the Pt-OPh bond of ((t)bpy)Pt(OPh)Cl to release PhOH. Kinetic studies show that Pd exhibits higher reactivity compared to Rh and Pt. The results of kinetic studies with Pd/SiO2 are consistent with a first-order dependence on the catalyst and the molecular Pt(II) complex ((t)bpy)Pt(OPh)Cl. TEM-EDS mapping and ICP-OES measurements reveal approximately 10-16% Pt deposition on the surface of Pd/SiO2 after 1 hour of hydrogenolysis of ((t)bpy)Pt(OPh)Cl.
Article
Chemistry, Applied
Byeongju Song, Jeongmyeong Kim, Iljun Chung, Yongju Yun
Summary: The catalytic properties of Pt catalysts supported on mesoporous silica were studied in the enantio-selective hydrogenation of ethyl pyruvate. The results showed that the pore structure and size of the m-SiO2 supports significantly influenced both the activity and enantioselectivity. The use of specific modifiers and H-2 pressure further improved the performance of the catalysts.
Article
Chemistry, Physical
Lucas Warmuth, Gulperi Nails, Maria Casapu, Sheng Wang, Silke Behrens, Jan-Dierk Grunwaldt, Claus Feldmann
Summary: Titania nanotubes (TNTs) impregnated with Pd and Pt nanoparticles were evaluated as heterogeneous catalysts in CO oxidation and H2O2 direct synthesis. The results showed that long TNTs outperformed short TNTs in both reactions, with promising performance in catalytic CO oxidation and H2O2 generation.
Article
Chemistry, Multidisciplinary
Mingyue Cui, Manjing Li, Jinhua Wang, Runzhi Chen, Zhaojian Xu, Jingyang Wang, Junfei Han, Guyue Hu, Rong Sun, Xin Jiang, Bin Song, Yao He
Summary: Zinc-doped silica nanospheres prepared using a hydrothermal synthetic strategy exhibit stable fluorescence and long-lived room-temperature phosphorescence properties, with high water solubility and excellent stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Naresh Nalajala, Kranti N. Salgaonkar, Inderjeet Chauhan, Siva Prasad Mekala, Chinnakonda S. Gopinath
Summary: The study synthesized facet-controlled Pd nanoparticles with different morphologies and Pt-coated Pd nanoparticles, finding that Pt-coating enhances catalytic activity, with 0.5θ(Pt)-Pd-TO/P25 showing the highest methanol conversion rate and formaldehyde selectivity. The results highlight the importance of surface properties in heterogeneous catalysis and suggest that a small amount of Pt can simulate the activity equivalent to bulk Pt.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Panchao Zhao, Bosheng Zhang, Xiaodong Hao, Wei Yi, Jialin Chen, Qigao Cao
Summary: A facile and adjustable synthetic technique combining spray-drying with thermal decomposition reduction has been employed to synthesize three-dimensional nanoframework nanomaterials with super-large surface areas. The as-synthesized Pt 3D-nanoframework showed improved electrocatalytic performance, and the addition of Pt element decreased the reduction temperature of other metals, resulting in the successful preparation of Pt-based multimetallic and HEA 3D-nanoframeworks.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Chenguang Li, Nannan Wu, Yumeng Qi, Jiaoqin Liu, Xiaoxue Pan, Jiali Ge, Siyuan Wang, Ruijuan Qu, Zunyao Wang
Summary: In this study, nitrogen-doped silica was successfully synthesized for the photocatalytic degradation of PCB-209, showing promising results in terms of efficiency and effectiveness. Various factors affecting the catalytic efficiency were investigated, providing valuable insights for further applications in organic pollutant removal.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Analytical
Baojun Long, Yuanmeng Zhao, Peiyu Cao, Wen Wei, Yan Mo, Juejing Liu, Cheng-Jun Sun, Xiaofeng Guo, Changsheng Shan, Ming-Hua Zeng
Summary: The researchers designed a catalyst composed of single-atom Pt supported on Ni(OH)(2) nanoplates/nitrogen-doped graphene for constructing an electrochemical nonenzymatic glucose sensor. The catalyst exhibited low anode peak potential and high sensitivity, with excellent selectivity, short response time, and high stability. The improved performance of the catalyst was attributed to the stronger binding strength of glucose on the single-atom Pt active centers and their surrounding Ni atoms, as well as the fast electron transfer ability of the conductive graphene.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Jung-Min Ji, Chang Ki Kim, Hwan Kyu Kim
Summary: The tellurium-doped carbon nanomaterial Te-MC(P) was developed through soft-templated carbonization, with tellurium atoms homogeneously dispersed in a three-dimensional mesoporous carbon matrix. Te-MC(P) exhibited superior electrocatalytic performance compared to Pt and tellurium-based materials, leading to enhanced photovoltaic efficiency.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Applied
Yasutomo Goto, Shinji Inagaki
Summary: In this study, the structural changes of BPy-PMO and Pt-BPy-PMO caused by thermal treatment were investigated, and nitrogen-doped porous carbon/silica composites with high nitrogen/carbon ratios and large pore diameters were successfully prepared. The pyrolyzed BPy-PMO contained abundant graphitic nitrogen and carbon species, along with a few oxygenated species. Moreover, Pt complexes on the pore surface of BPy-PMO transformed into Pt oxide nanoparticles and a small amount of Pt metal after heating.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Review
Engineering, Environmental
Marcin Janczarek, Lukasz Klapiszewski, Patryk Jedrzejczak, Izabela Klapiszewska, Agnieszka Slosarczyk, Teofil Jesionowski
Summary: The intensive development of construction in recent years has led to increasing attention from construction scientists towards new material solutions based on nanotechnology, such as the use of titanium dioxide in building materials. This article focuses on the modification of nanotitania to enhance its photocatalytic properties and analyzes its effects on self-cleaning, air-depolluting, and antibacterial properties of building materials, particularly cement-based composites. It also examines the mechanical and durability properties of TiO2-modified building materials, considering dispersion methods, rheological and mechanical parameters, and resistance to external factors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Ian L. Peczak, Robert M. Kennedy, Ryan A. Hackler, Rongyue Wang, Youngho Shin, Massimiliano Delferro, Kenneth R. Poeppelmeier
Summary: An improved hydrothermal synthesis method for shape-controlled and size-controlled STO NC supports was reported, enabling the scalable creation of Pt/STO catalysts for chemical conversion of waste polyolefins. The study demonstrated the importance of STO nucleation, SrCO3 formation, and solution pH in determining the formation of STO NCs. The Pt/STO catalyst produced through strong electrostatic adsorption showed promising results in high-density polyethylene hydrogenolysis.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Haonan Yu, Xiaofeng Yang, Hongbin Yang, Jinming Xu, Yanqiang Huang
Summary: A phosphorus and nitrogen co-doped graphene (PNG) was developed and used as a catalyst for the dehydrochlorination of 1,2-dichloroethane (EDC) to vinyl chloride monomer (VCM) production. The PNG showed a great improvement in catalytic performance, with PNG-900-6 exhibiting 4 times higher activity compared to nitrogen doped graphene (NG). The unique P-C coordination on the graphene was crucial in determining the catalytic performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Zhenhua Yao, Lei Li, Xuguang Liu, Kwun Nam Hui, Ling Shi, Furong Zhou, Maocong Hu, K. S. Hui
Summary: The study revealed that boron serves as an additional NO adsorption site in Pt/BG, while BG contributes to reducing Pt NPs size and promoting hydrogen spillover. The Langmuir-Hinshelwood dual-site kinetic model over Pt/BG was satisfied, showing activated NO adsorption on boron. This work sheds light on the mechanism of NO-H-2 reaction over Pt/BG and Pt/Gr catalysts, offering insights into the active sites' roles in catalyst design for NO abatement.
JOURNAL OF HAZARDOUS MATERIALS
(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
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)
Article
Chemistry, Multidisciplinary
Nur Munirah Safiay, Rozina Abdul Rani, Najwa Ezira Ahmed Azhar, Zuraida Khusaimi, Fazlena Hamzah, Mohamad Rusop
Summary: This research investigated the structural and optical properties of TiO2 thin films prepared by sol-gel spin coating process at different annealing temperatures. The films showed crystalline structure at 500 and 600 degrees C, with excellent UV absorption properties and optical band gap energy suitable for UV sensing device fabrication.
INDONESIAN JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
S. S. Taib, M. K. Ahmad, N. Nafarizal, C. F. Soon, N. J. Yaacob, J. Lias, N. M. Ramli, A. B. Suriani, A. Mohamed, M. H. Mamat, M. F. Malek, M. Shimomura
Summary: Rutile titanium oxide micro-rods and flower-like structures with hydrophobic properties were successfully fabricated on FTO glass substrate using hydrothermal synthesis. The samples were characterized using FE-SEM, WCA, and XRD, confirming the growth of TiO2 structures on the FTO surface.
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
N. Parimon, M. H. Mamat, I. B. Shameem Banu, N. Vasimalai, M. K. Ahmad, A. B. Suriani, A. Mohamed, M. Rusop
Summary: Manganese-doped nickel oxide nanosheet array films were prepared and annealed at various temperatures to study their properties, with the highest sensitivity and optimal performance observed at 500 degrees C annealing temperature.
NANOMATERIALS AND NANOTECHNOLOGY
(2021)
