Chin-hua Chia

Chin-hua Chia
Univeriti Kebangsaan Malaysia (National University of Malaysia) · Department of Applied Physics

Ph.D.

About

240
Publications
84,164
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5,127
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Introduction
Chin-Hua Chia is a Professor in the Materials Science Program, Universiti Kebangsaan Malaysia (UKM). His core research interests include developing nanomaterials. Chia is currently Editor of Sains Malaysiana. He received the Young Scientist Award from the Malaysian Solid State Science and Technology (MASS) in November 2014 and the Distinguished Lectureship Award 2017 by Chemical Society of Japan.
Additional affiliations
April 2008 - present
Universiti Kebangsaan Malaysia
Position
  • Professor

Publications

Publications (240)
Article
Full-text available
Owing to environmental pollution and increasingly strict regulations, heavy metals have attracted the attention of many researchers in various disciplines. Alginate and chitosan derivatives have gained popularity as biosorbents for water treatment. An increase in the number of publications on modified biosorbents for the biosorption of toxic compou...
Article
Full-text available
Rice straw activated carbon (RSAC) was produced and used to decolorize palm oil mill effluent (POME) via adsorption processes. Rice straw was carbonized and activated using potassium hydroxide (KOH) and sodium hydroxide (NaOH) to produce activated carbon. The properties of activated carbon (AC) were studied through surface analysis. The regeneratio...
Article
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Three-Dimentional (3-D) printing is currently a popular printing technique that is used in many sectors. Potentially, this technology is expected to replace conventional manufacturing in the coming years. It is accelerating in gaining attention due to its design freedom where objects can be produced without imagination boundaries. The review presen...
Article
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In this study, a fast and simple dissolution and coagulation method was adopted to produce polyethylenimine (PEI)-incorporated chitosan beads. The beads were characterized using FESEM, BET, TGA, and FTIR analysis. Evaluation of adsorption isotherms, adsorption kinetics, and thermodynamics support that the beads exhibit chemisorption, which process...
Article
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Functionalization is a promising approach to modify the physical and chemical properties of graphene quantum dots (GQDs). However, the synthesis of functionalized GQDs (F-GQDs) is usually conducted with strong acids. Thus, the sustainable synthesis route of F-GQDs remains a challenge. This is important for suitable optimization of GQDs to be applie...
Article
Graphene quantum dots (GQDs) are known for their low toxicity, strong fluorescence, high surface area, large solubility, and tunable band gaps. However, the change in their properties depends on the preparation processes of GQDs. Thus, certain types of preparation lead to certain defects, such as surface defect, edge defects, Stone–Wales defect. Th...
Article
One of the current trending devices running the market leads to photovoltaic (PV) applications. Their potentials have been well exploited over the years to attain the best output out of them. Moreover, the concept of introducing 2D graphene derivative, graphene quantum dots (GQDs) in such applications is much preferable nowadays, as it has extensiv...
Article
Full-text available
In this study, a cellulose membrane (CM) was chemically treated with phenolic (PF) resin to improve its performance as a polymeric insulator. The CM was prepared from kenaf pulp, and the PF was synthesized from oil palm empty fruit (EFB) fibre. Four different concentrations of synthesized PF resin (5, 10, 15, and 20 wt.%) were impregnated under wet...
Article
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Supercapacitors (SCs) have been widely investigated in the realm of energy resulting from their superior long lifespan and remarkable power density. However, their practical usage is limited because of the high effective resistance and relatively low energy density. Electrode material is crucial for determining the performance of SCs, so the innova...
Article
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Dye-sensitized solar cells (DSSCs) are more attractive than silicon solar cells due to their low dependency on light intensity so that they can perform both indoor and outdoor with low-level lightings. DSSC's global revenue exceeded 16 million USD in 2014 for emerging portable charging, solar bags, and wireless keyboards. However, on-grid DSSC modu...
Article
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The synthesis of esters is one of the most fundamental and significant subjects in organic chemistry and chemical industry because they are used in high-value products such as cosmetics, biofuel, pharmaceuticals, surfactants, and food ingredients. In this study, an efficient, economic, sustainable, and green protocol for oxidative esterification re...
Article
Poly(methyl methacrylate), poly(p,p-isopropylidenebisphenyl carbonate), and poly(ethylene terephthalate) are recently attracted more as cover and window materials from various advanced technology fields (smartphones, foldable and rollable smartphones, displays, various sensors in driverless automobiles, etc.) because of their high optical transpare...
Article
A bio-based polybenzoxazine demonstrating excellent thermal properties was synthesized using phenolic and its derivatives derived from liquefaction of empty fruit bunch (EFB) fibres to fulfill green chemistry principles. The liquefied EFB was reacted with furfurylamine and paraformaldehyde through a Mannich condensation reaction. For comparison pur...
Article
Unambiguously layer by layer (LBL) assembly of graphene quantum dots (GQDs), and dye (GQDs/dye) on TiO2 photoanode is the traditional and straightforward approach in the fabrication of graphene quantum dot-cosensitized solar cells (QDSSCs). Unfortunately, limited light absorption and low affinity of GQDs to TiO2 surface shadow the advantages of LBL...
Article
In this paper, the development of regenerated cotton linter cellulose membranes embedded with ZnO nanoparticles was conducted using the dissolution‐regeneration process. The physical and chemical properties of composite membranes were characterized using X‐ray diffraction, field‐emission scanning electron microscopy, Fourier‐transform infrared spec...
Article
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Doping heteroatoms is an effective means of modifying the electrochemical properties of reduced graphene oxide (rGO). In this work, we propose the modification of rGO via microwave-assisted synthesis with different concentrations of sulfur at 140 °C for 30 min. Characterization using X-ray diffraction, Fourier-transform infrared, and Raman spectros...
Article
This study reports the first structure and morphology details of octakis(acryloyloxypropyl)-octasilsesquioxane (POSS-Acryl8), a reactive inorganic-organic hybrid molecule, before and after photochemically crosslinked. POSS-Acryl8 was confirmed as an oblate ellipsoidal nanoparticle consisting of inorganic cage core (0.774 nm diameter) and chemically...
Article
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Development of polyurethane foam (PUF) containing bio-based components is a complex process that requires extensive studies. This work reports on the production of rigid PUFs from polyol obtained via liquefaction of oil palm empty fruit bunch (EFB) biomass with different isocyanate (NCO) indexes. The effect of the NCO index on the physical, chemica...
Article
Fine chemicals derived from renewable carbon feedstocks can be potentially used as various platform chemicals in the production of fuel additives, polymers, green solvents, foods, and cosmetics. Batch reactions are widely used for the conversion of lignocellulosic biomass into fine chemicals, which possess several drawbacks. Therefore, we investiga...
Article
One of the pioneering materials nowadays is graphene quantum dot (GQD), which possesses outstanding electrical, thermal, and mechanical properties followed by less toxicity and robust photoluminescence. These commendable properties allow GQD to be suitable enough to apply in dye-sensitized solar cells, incapacitating current material limits. Nevert...
Article
Free‐standing titanium dioxide (TiO2) nanowires (TNW) with great photocatalysis performances were formed by using a simple hydrothermal method. Pre‐cool rapid dissolution technique was used to dissolve cellulose, and the regenerated cellulose (RC) beads were used as a portable host for absorption and photocatalytic reaction. Comparisons were made b...
Article
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A large amount of sago pith waste (SPW) produced by the growing sago industry has become an environmental concern. Instead of disposing as waste, SPW could be converted into a hydrogel and used as a seed germination medium. In this study, a hydrogel was prepared from SPW cellulose fibres via crosslinking with epichlorohydrin (ECH). Fourier transfor...
Article
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This paper discusses the preparation of polyvinyl alcohol/cellulose nanofibril (PVA–CNF) aerogel nanocomposites loaded with zinc oxide (ZnO) particles via the freeze-thaw process, followed by subsequent in-situ synthesis of ZnO particles using zinc chloride and ammonium solution. Aerogel samples were characterized using scanning electron microscopy...
Article
In this study, we reports the first quantification details of the pencil hardness, eraser abrasion resistance and steel wool abrasion resistance of optically-transparent and biaxially-oriented poly(ethylene terephthalate) (PET) films in various thicknesses before and after hard coating (HC) and/or optically clear adhesive (OCA) coating. Surprisingl...
Article
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With the sharp rise in global interest in sustainability and environmental concerns, there is a growing demand in replacing petroleum-derived raw materials with renewable plant-based raw materials in the production of polymers. In this study, two palm fatty acid polyesters were synthesized from palmitic and stearic acids. Their chemical structures...
Preprint
Full-text available
Unambiguously layer by layer (LBL) assembly of graphene quantum dots (GQDs) and dye (GQDs/dye) on TiO 2 photoanode is the traditional and straightforward approach in the fabrication of graphene quantum dot-sensitized solar cells (QDSSCs). Unfortunately, limited light absorption and low affinity of GQDs to TiO 2 surface shadow the advantages of LBL...
Article
Here, we demonstrate a fast and facile method for rapid production of reduced graphene oxide (rGO) through a microwave-assisted reaction using the green reducing agent sodium cholate at temperatures between 120-180 °C for 1 hr. Characterization with ultraviolet-visible, Fourier-transform infrared, and Raman spectroscopy confirmed that reduction occ...
Article
In this study, synchrotron X-ray scattering and quantitative data analysis were performed on a series of 33-armed polystyrenes with four different arm molecular weights in cyclohexane (CHX, Θ solvent) and tetrahydrofuran (THF, good solvent). The quantitative scattering analysis was successfully done, providing molecular structure details and their...
Article
This study reports the first morphology and crystalline structure details of iron oxide nanoparticles in a comprehensive manner. A series of iron oxide nanoparticles were synthesized in 1-octadecene from iron(III) acetylacetonate with the aid of oleic acid surfactant and then followed by post thermal processes. Quantitative small and wide angle X-r...
Article
Bimetallic oxide/graphene nanocomposite has been recognised as a promising electrode material owing to its admirable electrochemical activity and excellent electrical conductivity. Herein, a distinctive approach has been applied on exploiting the graphene/MnV2O6 nanomaterial as a promising electrode for supercapacitor. In order to achieve fascinati...
Conference Paper
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Rice cultivation is the second-largest agricultural activity in the aftermath of the palm oil industry in Malaysia. The area of rice cultivation will be 689,810 hectares in 2018. Rice production, on the other hand, showed positive growth of 2 138 788 tonnes in 1994 to 3 064 822 tonnes in 2018. National Agricultural Policy 2011-2020 outlined that ef...
Article
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Star-shaped polymers are very attractive because of their potential application ability in various technological areas due to their unique molecular topology. Thus, information on the molecular structure and chain characteristics of star polymers is essential for gaining insights into their properties and finding better applications. In this study,...
Article
Cellulosic pulps from oil palm empty fruit bunches (EFB) and kenaf core were bleached and characterized with regard to their sugar content, crystallinity, molecular weight, carboxyl group content and solubility in NaOH/urea. The sugar content results showed glucose, mannose and xylose in EFB pulp and only glucose and xylose in the kenaf core cellul...
Article
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: Hydrogen (H2) is a clean energy carrier which can help to solve environmental issues with the depletion of fossil fuels. Sodium borohydride (NaBH4) is a promising candidate material for solid state hydrogen storage due to its huge hydrogen storage capacity and nontoxicity. However, the hydrolysis of NaBH4 usually requires expensive noble metal ca...
Article
Noble metal nanostructures have been widely explored as an effective method to increase photon absorption and charge separation in plasmonic photocatalysis. In this study, we integrated two different noble metals gold (Au) and silver (Ag) into Au/Ag bimetallic nanoparticles (BNPs) via solid-state thermal dewetting to investigate the room-temperatur...
Article
Full-text available
Activated carbon (AC) was produced from rice straw via a two-step method. Potassium hydroxide (KOH) and sodium hydroxide (NaOH) were used as activating agent. The activated carbon (AC) samples were used as adsorbent to remove methylene blue (MB) from aqueous solution. Characterizations using a scanning electron microscope (SEM), Brunauer-Emmett-Tel...
Article
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Activated carbon was produced from rice husk by activating with NaOH. Three types of samples were made at 850, 750, and 650 °C activation temperature. The properties of the samples were determined. The activated carbons have surface area of 429.82 m 2 /g from 850 °C activation, 121.39 m 2 /g (750 °C) and 93.89 m 2 /g (650 °C). The results were high...
Article
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3D lion’s mane like AlV3O9 microspheres deposited on the well-exfoliated graphene were successfully synthesised through a facile solvothermal method where the graphene sheet was prepared solely via the liquid phase exfoliation process. The highly electrical conductive graphene was introduced as a conductive substrate or backbone to support the diff...
Article
A series of silica nanoparticles (SNP-1, SNP-2, SNP-3, SNP-4, SNP-5 and SNP-6) were synthesized in ethanol by the hydrolysis and polycondensation reaction of tetraethoxysilane with the aids of water initiator and ammonia catalyst and then investigated in a comprehensive manner in terms of morphological structure by using synchrotron transmission sm...
Article
Full-text available
Cellulose cryogels crosslinked with epichlorohydrin (ECH) were successfully developed from kenaf core biomass via green urea/alkaline solvent system. The effect of ECH concentration (from 3 to 9 wt%) on the pore structure, density, morphology, thermal stability, mechanical properties, water absorption performance and acoustic insulation of cellulos...
Article
Full-text available
Acetosolv technique is considered as one of the best alternative way to extract technical lignin from biomass as it has high efficiency and environmentally friendly. In this study, microwave-assisted acetosolv technique were used to extract lignin from oil palm empty fruit bunch (OPEFB) in the presence of 3% sulfuric acid catalyst reacted at variou...
Article
In this study, a renewable phenolic component was synthesized using empty fruit bunch fibers via microwave-assisted liquefaction known as Liquefied Empty Fruit Bunch (L EFB ). L EFB can be used as phenolic derivative to replace petroleum-based phenol as it contains aromatic group in lignin that can be used as starting materials to synthesis polyben...
Article
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A series of polystyrene nanoparticles (PS-1, PS-2, PS-3, and PS-4) in aqueous solutions were investigated in terms of morphological structure, size, and size distribution. Synchrotron small-angle X-ray scattering analysis (SAXS) was carried out, providing morphology details, size and size distribution on the particles. PS-1, PS-2, and PS-3 were con...
Article
In situ growth of silver nanostructures (AgNSs) and reduction of graphene oxide (rGO) were successfully performed using a one-step segmented flow reaction system. The detailed crystal growth mechanism of the AgNSs on the rGO was discussed. The relationship between the presence of AgNSs (nanoparticles and nanowires) on the rGO and the rGO's electroc...
Article
Full-text available
In this work, sodium cholate (NaC) was used as novel green reducing agent for graphene oxide (GO) reduction at 90 °C and short synthesis time using a continuous segmented flow reaction system. As a comparison, we had used the common reducing agent which is glucose to study its chemical and electrochemical properties. The morphologies of GO and redu...
Article
We report the microwave synthesis of copper nanowires (CuNWs) by using alkylamine-mediated approach. The aspect ratio of CuNWs of this study was two–fold compared to the previous microwave-assisted synthesis study. In addition, we showed that microwave synthesis could produce high aspect ratio CuNWs in a much shorter time compared to conventional m...
Article
Full-text available
The electrochemical capability for the charge and energy storage of supercapacitors can be augmented by fabricating the hybrid and binder-free electrodes. In this work, the novel graphene/Co3V2O8 micro-pencils nanohybrids were successfully developed via the one-pot solvothermal method. The interactive effect between graphene and Co3V2O8 was investi...
Article
Full-text available
The recognition of cellulose nanofibrils (CNF) in the past years as a high prospect material has been prominent, but the impractical cellulose extraction method from biomass remained as a technological barrier for industrial practice. In this study, the telescopic approach on the fractionation of lignin and cellulose was performed by organosolv ext...
Article
Full-text available
Copper nanowires (CuNWs) with a high aspect ratio of ~2600 have been successfully synthesized by using a facile hydrothermal method. The reductions of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) and methylene blue (MB) to leucomethylene blue (LMB) by using sodium borohydride (NaBH4) were used as models to test the catalytic activity of CuNWs. We s...
Article
In this project, crystalline silver nanowires (AgNWs) are successfully grown using a continuous segmented flow process. The robust relationship among the structural, electrical and optical properties of the AgNWs in the function of the polyvinylpyrrolidone (PVP) chain length is elaborated. A concise carrier transport and a density mechanism are als...
Article
Full-text available
In this study, single wall carbon nanotubes (CNTs)/reduced graphene oxides (rGO) aerogels were prepared by a one-pot hydrothermal process without using a binder. The produced CNTs/rGO aerogel was used as cathode in electro-Fenton system for the decolouration of methylene blue (MB) and palm oil mill effluent (POME). The addition of CNTs increased th...
Article
Full-text available
Regenerated cellulose properties can be altered and manipulated by various methods and procedures. Coagulation steps in cellulose regeneration process is one of the most crucial step in determining the final properties of the regenerated cellulose products. This study was conducted to investigate the effect of different type of coagulant on the pro...
Preprint
Full-text available
We report the microwave synthesis of copper nanowires (Cu NWs) by using alkylamine-mediated approach. Cu NWs with aspect ratio ~612 was successfully synthesized at 120 °C for 4 h. Purification process of Cu NWs was done via a simple and fast centrifugation method using water-hydrophobic organic solvent system. The effect of purification on the perf...
Article
In order to improve the energy density of the supercapacitor, fabrication of next-generation materials with inimitable morphology and superior electrochemical performance is highly desired. Herein, a novel hybrid electrode material, namely graphene-Zn3V2O8 nanocomposites, were successfully prepared via facile solvothermal process followed by therma...
Article
Full-text available
ABSTRAK Elektrod superkapasitor elektrokimia dwi-lapisan telah dihasilkan menggunakan serbuk karbon monolit teraktif (KMT) sebagai bahan pemula dan grafen sebagai bahan tambah. Elektrod telah disediakan dengan mencampurkan serbuk KMT dan grafen dengan peratus berat yang berbeza (0, 5, 10, 20 dan 40 % bt.) yang ditambah larutan polivinilidena fluori...
Article
Full-text available
Core oil palm trunk (COPT) is a lignocellulosic waste that poses as an alternative carbon source in bio-chemical and bio-fuel production. The bulk of free sugar present in its sap renders COPT as a potential starting material in the synthesis of methyl levulinate (ML). In this study, the effect of different sap extractions on COPT and synthesised m...
Article
Full-text available
Liquefaction of lignocellulosic and cellulosic biomasses produces different polyol properties. Hence, direct comparative studies on the properties of both biomass liquefaction-derived polyols and polyurethane foams (PUFs) have been extensively performed. Optimization of oil palm empty fruit bunch fiber (EFB) and EFB-based cellulose (EFBC) liquefact...
Article
Full-text available
In this study, highly porous activated carbon was produced from rice straw by carbonization and followed by activation using potassium hydroxide (KOH). Activated carbon samples were prepared under different activation temperatures, i.e., 650, 750 and 850°C, and their physical and chemical properties were characterized accordingly. The BET surface a...