Murni Handayani

• PhD
• Researcher at National Research and Innovation Agency (BRIN)

The photocatalytic properties of semiconductors play a crucial role in eliminating water pollutants helping to mitigate significant health risks to humans and ecosystems. This study aims to synthesize rGO/ZnO/NiO nanohybrids (RZN) using the hydrothermal method which demonstrates promising photocatalytic properties for environmental remediation. FES...

The versatility of Stereolithography (SLA) 3D printing opens new possibilities in the field of hot embossing manufacturing, particularly in producing the vital master mold. This advancement significantly contributes to industrial growth through the application of manufacturing innovation. However, despite its advantages, the inherent low mechanical...

This study investigates the electrochemical reduction of quinine (QN) detection using boron-doped diamond electrodes (BDD). Different pulse voltammetry (DPV) of QN in a 0.1 M PB solution exhibits reduction peaks at -0.86 V (vs. Ag/AgCl). Additionally, the effects of pH and scan rate were explored to investigate the reduction mechanism within a pote...

In this study, ZnO, CdS, ZnO/CdS, and ZnO/CdS/Co nanostructures were successfully synthesized using a simple chemical precipitation method. The formation of these nanostructures was confirmed through x-ray diffraction (XRD), but their morphological properties were analyzed using scanning electron microscopy (SEM) and transmission electron microscop...

The antibacterial effects of AgNO3 have been observed and utilized in various applications. However, only a few studies have examined its effects on the mechanical properties of a matrix when combined. In this study, AgNO3 was used as an additive and blended with PLA resin for 3D printing to study its impact on buckling behavior, which is critical...

A successful investigation was conducted on the in‐situ modification of MIL‐101(Fe)‐NH2 with quercetin and its controlled release under various pH conditions. MIL‐101(Fe)‐NH2 was synthesized using an electrochemical method at room temperature (15 volts, 30 minutes). The formation of the material was confirmed through comprehensive analyses, includi...

Hybrid composites using adhesive joints are gaining popularity in various industries 18 as their various material combinations can create certain advantages. This research focuses 19 on examining the mode I and mode II fracture toughness characteristics of the combined 20 laminate between Steel Plate Cold Rolled Commercial (SPCC) metal and Carbon F...

Gold nanodendrite (AuND) is a type of gold nanoparticles with dendritic or branching structures that offers advantages such as large surface area and high conductivity to improve electrocatalytic performance of electrochemical sensors. AuND structures can be synthesized using electrodeposition method utilizing cysteine as growth directing agent. Th...

Amodiaquine (AQ) is an essential medicine in treating malaria. Yet, the threat of drug resistance and toxicity necessitates accurate measurement of AQ in the human body. This research determines the amodiaquine (AQ) detection performance of boron-doped diamond (BDD) working electrodes. The study utilizes different pulse velocity (DPV) methods to an...

An innovative Z-scheme WO3/g-C3N4 composite was efficiently produced via a straightforward hydrothermal method and applied to the photodegradation of phenol. The physiochemical behaviours of WO3, g-C3N4, WO3/g-C3N4 composite was analyzed by various analytical instruments. Compared to WO3, g-C3N4 single counterparts WO3/g-C3N4 Composite exhibits sup...

In this article, we presented the development of fully modular microfluidic flow cells for an electrochemical using 3D printing. The proposed devices are potentially applied for electrochemical measurements using a small sample volume on a fully portable, reusable, fabricated, low-cost, PDMS-free, and leakage-free flow cell. This concept offers a s...

We synthesized Ag-doped CeO2/ZnO nanocomposites by means of a ethanolic dispersion technique. Several methodologies for characterization were applied to the study of these nanocomposites, such as transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectro...

In the development of biosensors, it is essential to have sensors that provide rapid responses, exhibit high sensitivity and selectivity, and are non-invasive, such as screen-printed carbon electrode-based biosensors. In this study, SPCE-based and fabric-based biosensors were fabricated by modifying the working electrode (WE) surface using function...

The study investigates the fabrication and analysis of nickel microparticle-reinforced composites fabricated using the digital light processing (DLP) technique. A slurry is prepared by incorporating Ni-micro particles into a resin vat; it is thoroughly mixed to achieve homogeneity. Turbidity fluctuations are observed, initially peaking at 50% withi...

Molten salt synthesis (MSS) represents an emerging green and environmentally friendly approach for engineering the structural and phase characteristics of multifunctional materials. In this study, we report the rapid synthesis of cobalt (Co)-based electrodes through MSS under 15 min with high yield. Our findings reveal that the selection of salt pr...

In this work, we reported the simple one-step wet impregnation method of g-C3N4/MnO2 nanocomposites aimed at improving the photocatalytic degradation efficiency of methylene blue dye. The synthesized catalysts underwent comprehensive characterization using various techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (...

Utilizing Aloe vera gel (AVG) extracts as reducing agents, the hydrothermal synthesis of dual-functional iron oxide nanoparticles (Fe2O3 NPs) offers a straightforward and environmentally friendly approach. AVG extract, rich in polyphenol complexes and antimicrobial compounds, serves both as a reducing agent for ferric chloride in aqueous solutions...

In this study, ceramic materials of Mg(Ti0.99Sn0.01)O3 were synthesized and decorated on reduced graphene oxide, forming a nanocomposite of rGO/Mg(Ti0.99Sn0.01)O3 (rGO/MTS001). The successful synthesis results were confirmed by XRD, UV–vis analysis, FT-IR, and SEM-EDS. The MTS001 has a flower-like morphology from scanning electron microscopy (SEM)...

Integration of gold nanoparticles onto electrochemical biosensor electrodes has been widely conducted to improve the performance of biosensors. Gold nanospikes (AuNS), as one of the gold nanoparticle morphologies, can be integrated into biosensors through electrodeposition and has the potential to immobilize bioreceptor on biosensors using the self...

In this work, reduced graphene oxide coupled silver molybdate binary nanocomposites (Ag2MoO4/rGO nanocomposites) have been prepared via ethanolic dispersion method. The crystalline character and surface properties of the developed Ag2MoO4/rGO nanocomposites were proved by X-ray diffractional (XRD), scanning electronic microscopic (SEM), and transit...

In this study, we demonstrate a facile, durable, and inexpensive technique of producing silver nanoparticles-decorated multi-walled carbon nanotubes (MWCNT/AgNP) on the easy-to-use screen-printed carbon electrodes (SPCE) for non-enzymatic detection of uric acid (UA) in an electrochemical sensor. The developed sensors show great durability for three...

Research on the application of graphene (G) and graphene quantum dots (GQDs) for biomedical engineering has attracted much attention over the last decade. Graphene and its derivatives have shown great biocompatibility, solubility, selectivity, large surface area, high purity, biofunctionalization, high drug loading capacity, and cell membrane penet...

We present the characteristics and mechanical strength of rGO-AgNPs nanocomposites in PLA-based 3D printing. The nanocomposites are characterized using X-ray diffraction and UV-Vis spectroscopy. The XRD spectrum reveals diffraction peaks at 38.14°, 44.30°, 64.50°, and 77.42°, corresponding to the (111), (200), (220), and (3111) planes of the Ag cry...

Modification in the manufacturing process of bio-adhesive need to be carried out to improve the properties of sorghum bagasse particleboard, such as adding nanocatalyst into the bio-based adhesive. This study was conducted to determine the effectiveness of nanocatalyst in enhancing the properties of sorghum bagasse particleboard. Each nanocatalyst,...

3D-printed nasopharyngeal swabs for medical sample collection have been manufactured via additive manufacturing (AM), evaluated, and characterized in the present study. A multi-part component of nasopharyngeal swabs was proposed, in which the swab and handle were manufactured separately to reach sustainable production and environmentally friendly p...

Graphene is a 2D material that attracts great attention from researchers worldwide due to its excellent properties such as large surface area, excellent chemical stability, high electron mobility and electrical conductivity. In this study, the synthesis of reduced graphene oxide (rGO), one of the derivatives of graphene materials, was performed by...

In recent years, measuring and monitoring analyte concentrations continuously, frequently, and periodically has been a vital necessity for certain individuals. We developed a cotton-based millifluidic fabric-based electrochemical device (mFED) to monitor glucose continuously and evaluate the effects of mechanical deformation on the device’s electro...

Carbon-based nanomaterials have gained the attention of researchers in decades because of their superior chemical, electrical, mechanical, optical, and thermal capabilities. These appealing features allow it to be used in various fields, including agriculture, waste treatment, energy, sensors, and biomedical. Carbon nanomaterials can be applied in...

The discharge of anionic and cationic synthetic dyes into the environment can cause significant health and environmental problems. Adsorption is promoted as one of the efficient methods to solve this issue. In this work, a metal-organic framework, namely Materials of Institut Lavoisier-100(Cr) denoted as MIL-100(Cr), was synthesized mechanochemical...

Tenaga Pendidik adalah sumber yang sangat penting bagi setiap sekolah dalam melangsungkan pendidikan anak bangsa, guru juga mempunyai tantangan sendiri bagi pihak pengelola lembaga pendidikan untuk dapat memberikan suatu keputusan yang terbaik, serta berkualiatas, guna membantu meningkatkan kualitas pendidikan dimasa yang akan datang. Namun SMPIT R...

The development of renewable energy is becoming a crucial aspect because fossil fuels are non-renewable energy and will run out in the near future. Since Indonesia is in the equator area which gets sunshine throughout the year, solar cell is one of the renewable energy which is very promising as renewable energy. The obstacle to develop solar cell...

Heavy metals are pollutants that are harmful to living things and the environment can be degraded by microbes or understood by other living things so that they can cause health problems. One of the heavy metals that is often found in wastewater is lead. Lead is widely used in the manufacture of batteries, metal products such as ammunition, cable co...

In this study, we reported the construction of Gold Nanospike (AuNS) structures on the surface of screen-printed carbon electrode (SPCE) used for non-enzymatic electrochemical detection. This modification was prepared with a one-step electrodeposition method by controlling the electrodeposition parameters, such as applied potential and deposition t...

In this article, we presented the development of fully modular microfluidic flow cells for an electrochemical using 3D printing. The proposed devices are potential for electrochemical measurements using a small sample volume on a fully portable, reusable, simply fabricated, low-cost, PDMS-free, and leakage-free flow cell. This concept offers a simp...

We demonstrated potential features of gold nanoparticle bipyramid (AuNB) for an electrochemical biosensor. The facile synthesis method and controllable shape and size of the AuNB are achieved through the optimization of cetyltrimethylammonium chloride (CTAC) surfactant over citric acid ratio determining the control of typically spherical Au seed si...

Titanium alloys have been widely used in biomedical applications, especially for orthopedic implants. Despite its excellent mechanical properties, the chance of corrosion and ion leakage from the alloy cannot be avoided. Corrosion and ion leakage could cause systemic irritation and inflammatory effects inside the human body. Thus, a surface coating...

We present a low-cost and simple method to fabricate a novel lock-and-key mixer microfluidics using an economic stereolithography (SLA) three-dimensional (3D) printer, which costs less than USD 400 for the investment. The proposed study is promising for a high throughput fabrication module, typically limited by conventional microfluidics fabricatio...

We present a low-cost and simple method to fabricate microfluidic modules directly on a submillimeter scale utilizing an economic stereolithography (SLA) three-dimensional (3D) printer, which only costs less than 400 USD for the investment. The proposed study is promising for a high throughput fabrication module, typically limited by conventional m...

Multi-walled carbon nanotubes (MWCNTs) are known as efficient drug carriers. To improve their interaction with other materials, surface modification of MWCNTs is necessary. In this work, MWCNTs were functionalized with acid and polysaccharides (chitosan and gelatin). The functionalization process was done via modification with acid solutions of nit...

MgB2 is a high possible superconducting material that can be applied quite practically with the functionalization of Mg-B materials. Material development is carried out by adding carbon, namely Graphene Oxide (GO), which is a single atom layered material. The Powder in Sealed Tube (PIST) method is practically used to reduce oxidation. This study ai...

Dopamine concentration abnormalities in the body can cause various disorders and diseases such as Parkinson's, Tourette's syndrome, and depression. In this study, graphene oxide (GO) was combined with Fe3O4 to sensitively and selectively detect dopamine. The performance was evaluated by cyclic voltammetry (CV) and differential pulse voltammetry (DP...

Understanding particle size analysis is essential for pharmaceutical, mining, environmental, coatings, and other industries. Although there are numerous technologies that can be utilized to take particle size measurements, the results of those measurements are presented automatically and are sometimes difficult to understand. In this study, using t...

Graphene has excellent properties which can be a promising material as nanocomposites for application in a drug delivery system (DDS). In this study, reduced graphene oxide/silver nanoparticles (rGO/AgNPs) nanocomposites was synthesized using a facile in-situ method for drug loading application of acetylsalicylic acid (ASA). The synthesis results w...

Nanoparticle utilization for the prevention, diagnostics, and treatment of diseases is widely known as one of the medicine branches, nanomedicine. The ability to penetrate the higher space between cells and cell walls makes nanoparticles have the potential to be used as a drug delivery system (DDS). Furthermore, various techniques can be combined w...

In this study, further processing of silica precipitated from sodium silicate was carried out using an ultrasonic transducer. The ultrasonication process was carried out with the aim to obtain smaller particles and uniform distribution of silica precipitated. The ultrasonication process was carried out using three solvents medium in water, ethanol,...

Silica in amorphous form is one of the fillers that is indispensable for the industrial world, especially for the superior material industry. Amorphous silica in the form of cristobalite compounds are inert, soft, and have high porosity which is suitable to be used as certain filler materials. This research describes about the characterization of a...

The ternary nanocomposite of reduced graphene oxide/chitosan/ZnO (RGO/Cs/ZnO) was synthesized by a facile one-step hydrothermal route. The structure-capacitive performance relationships and the effect of the prolonged time of hydrothermal process for supercapacitor applications are studied. In the prolonged hydrothermal process of 20 hours, the ter...

Multi-walled Carbon Nanotube (MWCNT) pure is easy to form aggregate, making it difficult to apply as a drug carrier since it can be toxic to the body. It can be overcome by functionalization using surfactants, like cetyltrimethyl ammonium trichloro-monobromo-cerate (CTACe) and polyethylene glycol (PEG). First, MWCNT was functionalized with CTACe su...

Electrochemical method is often chosen to analyze various bio-chemical reactions due to its operation simplicity with versatile applications. Thus, for this purpose, the procurement of potentiostat, an electrochemical-based analysis instrument, also needs to focus on the low price, but maintaining its rich analysis features. In this paper, we desig...

It is very important to develop green composite materials owing to increasing global environmental issues. One of the alternative raw materials for the production of green composites is biomass. Bagasse sorghum is a promising alternative raw material for the manufacturing of particleboard composites. The influence of sorghum accessions on the perfo...

Controlled-release feature is still a major challenge in the design of drug carriers, especially in cancer therapy. In our investigation, we successfully tailored the surface of magnetite embedded mesoporous silica ([email protected]2) with β-amino alcohol-based organosilane through a facile and one-pot method and further characterized using FTIR,...

It is very important to develop green composite materials owing to increasing global environmental issues. One of the alternative raw materials for the production of green composites is biomass. Bagasse sorghum is a promising alternative raw material for the manufacturing of particleboard composites. The influence of sorghum accessions on the perfo...

Graphene and silica are two materials that have wide uses and applications because of their unique properties. Graphene/silica hybrid composite, which is a combination of the two, has the good properties of a combination of graphene and silica while reducing the detrimental properties of both, so that it has promising future prospects in various fi...

Vanadium redox flow battery (VRB) is a renowned electrochemical energy storage device for large scale applications owing to its promising storage capability, long life and safety. However, the lower efficiency of VRB system combined with the non-renewable graphite-based electrodes have limited the widespread of VRB commercial market. This study inv...

Graphene oxide (GO) is a carbon-based material with good electronic, chemical, and fluorescence properties and high potential as biosensor applications. Graphene oxide was modified by strontium oxide (SrO-GO) and iron oxide (Fe3O4−GO) for screen-printed carbon electrode (SPCE) modification. The characterization of graphene oxide and nanocomposites...

In this work, the process of synthesis of graphene oxide was carried using modified Hummer’s method. Synthesizing graphene oxide was obtained by threating pure graphite using KMnO4 and H2SO4 as the oxidizing agent and sonicating the solution to separate the layers of the graphite. The result of the graphene oxide then reduced to reduce graphene oxi...

Graphene has many applications and is a promising material. Graphene synthesis methods include mechanical exfoliation, GO reduction, and chemical vapor deposition. In this work, the graphite synthesis to produce graphite oxide powder as a raw material for graphene oxide with a variation in oxidation time using the Hummers method was performed. Char...