A5003732761- Advanced Cellulose Research Studies
- Electrospun Nanofibers in Biomedical Applications
- Carbon and Quantum Dots Applications
- Lignin and Wood Chemistry
- Nanocomposite Films for Food Packaging
- Catalysis and Hydrodesulfurization Studies
- biodegradable polymer synthesis and properties
- Biodiesel Production and Applications
- Supercapacitor Materials and Fabrication
- Biofuel production and bioconversion
- Wound Healing and Treatments
- Natural Fiber Reinforced Composites
- Polymer Nanocomposite Synthesis and Irradiation
- Advancements in Battery Materials
- Material Properties and Processing
- Polymer Nanocomposites and Properties
- Agricultural and Environmental Management
- Thermochemical Biomass Conversion Processes
- Graphene research and applications
- Food and Agricultural Sciences
- Graphene and Nanomaterials Applications
- Advanced Photocatalysis Techniques
- Natural Products and Applications
- Polysaccharides and Plant Cell Walls
- Catalysis for Biomass Conversion
University of North Sumatra
2011-2024
Rajagiri Hospital
2021
U.S. Air Force Institute of Technology
2021
Tsinghua University
2021
University of Technology Malaysia
2021
Weatherford College
2019
State University of Medan
2019
Hospital Universiti Sains Malaysia
2013
Queen Mary University of London
2007-2011
This study reports on successful synthesis of carbon dots (CDs), nitrogen-doped zinc oxide (N-ZnO), and N-ZnO/CD nanocomposites as photocatalysts for degradation methylene blue. The first part was the CDs utilizing a precursor from soybean ethylenediamine dopant by hydrothermal method. second N-ZnO with urea nitrogen carried out calcination method in furnace at 500 °C 2 h an N2 atmosphere (5 min-1). third nanocomposites. characteristics CDs, N-ZnO, were analyzed through Fourier transform...
The synthesis of zinc oxide (ZnO), with the support silver (Ag) and Graphene Oxide (GO), was carried out in several stages as a potential photocatalytic material. First, GO synthesized from commercial graphite using Hummers' method, ZnO Ag precursors were prepared. second stage electrospinning process, followed by calcination. solution to produce nanofibers, mixture polymer (polyvinyl alcohol), acetate, AgNO3, GO. fibres produced thermally treated at 500 C for 2 h. XRD FTIR analyses...
The electrospinning of acetylated lignin/polyvinyl alcohol (PVA) nanofibres was carried out to expand the application lignin materials obtained from oil palm empty fruit bunches (OPEFB). Lignin isolated by steam explosion method and subsequently precipitated using H2SO4. Acetylated produced mixing acetic anhydride pyridine at a 2:1 v/v ratio. Following acetylation process, FTIR analysis showed absorption C=O carbonyl group wavenumber 1714.6 cm-1. chemical structures were established 1H NMR...
Bacterial cellulose (BC), chitosan (Chi), and collagen (Col) are known as biopolymers which have met some properties that required wound dressing. This study focused on investigating the fabrication of BC-based dressing with collagen, since has red blood cells binding anti-bacterial properties, while can support cell tissue growth for skin wounds. The was prepared by impregnating BC fibers in and/or solution 24 h. FTIR used to confirm intermolecular interaction amine hydroxyl group...
This research was aimed to investigate the effect of Co and Co-Mo metal loaded on Sarulla Natural Zeolite which has been activated calcined (SNZ-Cal) as supports for better understanding characterization catalytic activity hydrocracking MEFA rubber seed oil. The added through a wet impregnation method using Co(NO3)2·6H2O (NH4)·6Mo7O24·4H2O precursor salts. catalyst oxidized at 500 °C 2 h within oxygen gas flow, followed by reduction process with H2 flow similar condition obtain catalysts....
Abstract One of the current challenges in biosensors is to develop a device with high biocatalytic activity, sensitivity, selectivity, low detection limit, fast response towards analyte, eco‐friendly and also low‐cost price. Bacterial cellulose (BC), pure mat nanosized fibres, represents an alternative development new materials for sensing applications. BC has surface area, porosity water absorbance, it biocompatible polymer. In order produce BC‐based devices, original network can be...
Cellulose nanofibers (CNFs), chitosan, and silver nanoparticles (AgNPs) are widely used to enhance the active functions antibacterial properties of wound dressings. This study was conducted prepare CNF/AgNP-chitosan using a straight incorporation method assess its antimicrobial activity. CNFs were isolated from oil palm empty fruit bunches (OPEFBs) pulping acid hydrolysis. AgNPs synthesized green synthesis method. The dressing produced by mixing 10% CNF solution in LiCl/DMAc AgNP-chitosan...
Bacterial cellulose (BC) is a biopolymer commonly used for wound dressing due to its high biocompatible properties either in-vitro or in-vivo. The three-dimensional fiber structure of BC becomes an advantage because it provides template the impregnation materials in order improve BC’s as dressing, since has not displayed any bioactivity properties. In this study, micro-colloidal Zanthoxylum acanthopodium (MZA) fruit was loaded into fibers via in-situ method. Z. known have anti-inflammatory,...
A study on isolation and characterisation of cellulose nanofibre (CNF) lignin was conducted to expand the application CNF from oil palm biomass. extracted by steam explosion by-product precipitated obtain using soda-pulping method. The concentrations NaOH used for precipitation were 2%, 4%, 6%. morphology characterised scanning electron microscopy (SEM). with dimension between 50 nm 100 investigated transmission (TEM). functional group observed Fourier-transform infrared (FTIR) spectroscopy,...
Bio-oil includes significant levels of oxygenate molecules, which might induce component instability and reduce its physicochemical qualities. To counteract this, the must undergo a hydrodeoxygenation (HDO) reaction. Due to presence acidic active sites, zeolites have been shown high hydrogenation deoxygenation capabilities. However, natural zeolite has large number impurities low acidity density. Consequently, before being employed as an HDO catalyst, pretreatments such preparation...
This research explores utilizing abundant, economical cassava as a raw material for producing cationic starch in Indonesia. Cationic was synthesized by etherifying with CHPTAC monomer at 50-90°C. Successful modification confirmed via FTIR and NMR spectra. Characterization revealed the 80°C product exhibited optimal properties: high degree of substitution (0.35) reaction efficiency (98±1.2%). Its amorphous morphology impacted thermal resistance compared to crystalline forms. economically...
Biodegradable bioplastics provide a promising solution to mitigate environmental harm from petroleum-based plastics. This study focuses on optimizing bioplastic films made oil palm trunk starch (OPTS), using glycerol (10, 20, and 30 % v/w) as plasticizer modified with citric-acid epoxidized (CEPO). The were formed the casting method analyzed for morphology, functional groups, diffraction peaks, thermal mechanical properties, degradation time, compostability. optimal conditions achieved...
Tar is a toxic polycyclic aromatic hydrocarbon (PAH) compound that can cause pipe clogging problems and engine damages. Thus, the purpose of this study to assess effectiveness coconut coir from shells (Cocos nucifera) as tar adsorbent integrated into pyrolysis reactor. The process occurred at 400 °C for 4 h in equipment consisted combustion reactor, filter reactor an adsorbent, condenser. results FTIR SEM analysis have shown could be effectively used adsorbent. GCMS test showed no PAH...