Yuly Kusumawati

Institut Teknologi Sepuluh Nopember | ITS · Department of Chemistry

Mesoporous heterojunction MOF-derived α-Fe 2 O 3 /ZnO composites were prepared by a simple calcination of α-Fe 2 O 3 /ZIF-8 as a sacrificial template.

In this research, the adsorption of methylene blue (MB) and methyl orange (MO) on ZnO and nickel-doped ZnO (Ni-ZnO) clusters was investigated through the density functional theory (DFT). The study included the interaction with ionized MB, neutral MB, ionized MO and neutral MO. In the case of Ni-doped ZnO, the two probabilities of nickel multiplicit...

This study investigated the biotransformation of methylene blue (MB) by mixed fungal cultures of Gloeophyllum trabeum and Aspergillus oryzae. Equal volumes of A. oryzae and G. trabeum cultures were applied to Erlenmeyer containing MB and incubated at 30°C for 7 days. The change in absorbance of the MB control solution and the solution after applica...

The selection of the solvent during the membrane preparation process significantly affects the characteristics of the resulting membrane. The large number of organic solvents available for dissolving polymers renders this experimental approach ineffective. A computational approach can select a solvent using the solvation energy value approach. In a...

Photocatalytic degradation of Methylene Blue (MB) by zinc oxide/zeolite socony mobile-5 (ZnO/ZSM-5) composites was investigated. The ZSM-5 material was synthesized from red mud by a two-step hydrothermal method to which ZnO loadings at different mass ratios were subsequently performed. Characterizations using X-ray diffraction (XRD), Fourier transf...

Zinc oxide nanoparticles (ZnO NPs) were synthesized using the polyol and the coprecipitation method. ZnO NPs were characterized and analyzed by XRD, SEM, UV-DRS, and BET Surface area. The XRD results showed that both synthesis methods have successfully produced ZnO with a hexagonal crystal structure. The results of SEM micrographs show that the ZnO...

The increasing demand for products that use the electroplating process has caused the growth of the electroplating industry in various countries to increase. This growth was followed by an increase in the amount of toxic and hazardous chromium waste in the water. Continuous technology development is needed to overcome these problems. One of the tec...

Two-dimensional hybrid organic-inorganic perovskites (2D-HOIPs) possess intriguing structural properties which makes them promising materials for diverse optical, electronic and scintillation applications. Recently, several classes of hybrid perovskites exhibit potential candidate for radiation detection. However, the scintillation properties of co...

This study aimed to get an insight into the adsorption of three synthetic dyes onto chitin using experimental and computational approaches. The successful preparation of α–chitin was confirmed using the Fourier Transform Infrared (FTIR) and X-Ray Diffraction (XRD). In addition, the presence of porous and fiber on the surface of the extracted chitin...

The development of the textile industry in Indonesia is rapid. It cause serious environmental problems because the dyes used in the textile industry are synthetic that is azo dyes. Azo dyes are non-biodegradable substances that pollute the environment if not processed. One of the azo dyes that is often used in the textile industry is Methyl Orange....

The rapid development of membrane technology in various applications requires new membrane materials to achieve good separation performance. Materials in great demand are low in cost, easy to prepare, sustainable, and have good separation performance. In addition, consideration of environmental aspects is also crucial in the selection of membrane m...

Ionic liquid cations (ILCs) have been utilized in hybrid organic-inorganic perovskites (HOIPs) to enhance their photoluminescence performance. However, the high number of possible cations and anions needed to form ILCs makes the experimental measurement time and cost consuming. Computational methods that could assist the selection of ILCs for this...

Red mud wastes have been converted into mesoporous zeolite socony mobile-5 (ZSM-5) followed by deposited titanium dioxide (TiO2) nanoparticles to generate synergy adsorption-photodegradation for removal of dye removal in waste water. The amount of TiO2 loading was varied to achieve optimum photocatalytic activity while maintaining the mesoporosity...

Cationic and anionic dyes are frequently used in industrial sectors and cause many environmental and health problems. Orange peel has the potential to absorb dye as an adsorbent. This study aimed to explore the adsorption of methylene blue (MB) as a cationic dye and methyl orange (MO) as an anionic dye using orange peel (OP) and its modification us...

The numerous benefits provided by Zinc oxide have attracted attention. Therefore, plenty of ZnO synthesis methods have been developed. This study reported the phytosynthesis of ZnOs by Hibiscus tiliaceus leaf extract, the characterization of phytosynthesised ZnOs, and their antibacterial and antioxidant activities. The H. tiliaceus leaf extract was...

Pada program pengabdian masyarakat berbasis produk yang dilakukan Tim Abdimas Institut Teknologi Sepuluh Nopember (ITS) dihasilkan alat produksi air minum menggunakan perpaduan teknologi membran Reverse-Osmosis (RO), adsorben dan sinar UV yang sesuai dengan baku mutu air dari air sumur di Panti Asuhan Yatim Aisyiyah (PAY Aisyiyah). Kegiatan ini mel...

The adsorption simulation of acetic acid, methanol, and triacetin has been carried out on the ZnO and V-doped ZnO (V-ZnO) through computational study. The DFT/B3LYP method was applied using the Def2-TZVP basis set. The results show that the acetic acid adsorption on the ZnO surface was the most favorable among the others. The insertion of V atom in...

Red mud as industrial waste from bauxite was utilized as a precursor for the synthesis of mesoporous ZSM-5. A high concentration of iron oxide in red mud was successfully removed using alkali fusion treatment. Mesoporous ZSM-5 was synthesized using cetyltrimethylammonium bromide (CTABr) as a template via dual-hydrothermal method, and the effect of...

Direct synthesis of Al-HKUST-1 was successfully carried out using the solvothermal method. The Al2O3 added into the reaction mixture was varied at 10, 20, 40, and 80% with respect to the weight of HKUST-1. The diffractogram patterns of the synthesized HKUST-1 and Al-HKUST-1 displayed characteristic peaks at 2θ of 6.5, 9.3, 11.4 and 13.3°, where all...

In this research, a nickel (Ni) doped ZnO cluster was used to evaluate the adsorption interactions of methylene blue (MB). They have been studied through DFT calculation using the ORCA program. The adsorption interaction between MB and ZnO or Ni-doped ZnO has been investigated in terms of energy gap (Eg), bond length, Mulliken charge transfer, and...

Several alkali metalss (AM) are doped into ZnO nanoclusters (Zn12O12 NCs) has been studied in geometry optimization, energy and electronic properties by using density functional theory (DFT). It has been proven that adding alkali metal is an effective way to decrease energy gap to 0.985. The minimum energy gap of HOMO-LUMO is Rb-doped ZnO, and the...

The increased concentration of Nannochloropsis sp. microalgae during the harvesting process is of great importance economically. Separation of Nannochloropsis sp. using Polyvinylidene Fluoride (PVDF) polymeric membrane was studied with the addition of 2% LiCl to improve up-concentration performance. The Hermia model is used to predict the type of f...

Zinc oxide nanoparticles (ZnO NPs) were synthesized by polyol method with diethylene glycol (DEG) as the polyol. Synthesis was carried out with z = 0.5 mol/L, h ratio = 5 and b ratio = 0. The ZnO NPs were characterized by XRD, FTIR, and SEM Instruments. The characterization results showed that ZnO nanoparticles were successfully synthesized with he...

Synthesis of ZIF-8 using acetic acid (AA) as polar solvent produced uniform nanoparticles with enhanced adsorption properties for methylene blue removal. Morphology, structural properties and adsorption capacity of ZIF-8 nanoparticles were compared with ZIF-8 produced using N,N-dimethylformamide (DMF) solvent. ZIF-8 (AA) formed uniform nanoparticle...

span id="docs-internal-guid-710aacff-7fff-63c8-d621-c027e79f6f4f"> The present research studied about decolorization of methylene blue dye using photocatalyst ZnO/ZSM-5 under UV-LED lamp. ZnO/ZSM-5 was synthesized using the impregnation method by adding two grams ZSM-5 to Zn solution 0.3 M 10 mL. Photocatalyst was characterized using X-ray diffract...

span id="docs-internal-guid-710aacff-7fff-63c8-d621-c027e79f6f4f"> ABSTRACT. The present research studied about decolorization of methylene blue dye using photocatalyst ZnO/ZSM-5 under UV-LED lamp. ZnO/ZSM-5 was synthesized using the impregnation method by adding two grams ZSM-5 to Zn solution 0.3 M 10 mL. Photocatalyst was characterized using X-ra...

The sensitizer dye contacts onto the TiO 2 surface through an anchoring group in a Dye-Sensitized Solar Cells (DSSC). The thermal stability of the anchoring group and TiO 2 binding contact is important to be considered in order to obtain the cell stability. Phosphonic acid is an anchoring group that has a good binding-contact thermal stability with...

Brookite and anatase are two of polymorphs TiO2 that are pomising to be used as photoanode in Dye Sensitized Solar Cells (DSSC) application. The application of nitroxide radical compound as a redox couple for DSSC electrolyte is promising because they have a high standard reduction potential. Unfortunately, the couple of these compounds with the an...

ZSM-5 is a zeolite that widely used as adsorbent. The performance of ZSM-5 can be improved by modification of zeolite with metal growth. This research modified ZSM-5 with a transition metal nickel (Ni). The modification aims to provide photocatalytic activity of ZSM-5. The prepared-materials were analyzed with XRD, FTIR, FESEM-EDX, and BET techniqu...

Computational study on electronic properties of betanin and their derivatives has been explored using time-dependent density functional theory (TD-DFT) methods. The TD-DFT calculation result shows red shift on the absorbance spectrum on the protonated form of betanin, which is beneficial for Dye-Sensitized Solar Cells application due to the lower e...

Kinetic study of methylene blue photocatalytic decolorization using zinc oxide was carried out under UV-LED lamp irradiation. Zinc oxide was prepared by precipitation method. Zinc oxide was characterized by XRD, FESEM, and N2 adsorption-desorption. Characterization results show that zinc oxide has a hexagonal crystal face, particle size between 0.1...

The growth in textile and printing industries proven detrimental to the aquatic environment as the industrial waste containing dye seeped into the ecosystem. A high concentration of dye in water possess negative impacts on water ecosystem and harmful to human health. Removal of methylene blue (MB) dye from industrial waste via adsorption pathway ha...

The properties needed for photocatalytic applications, such as large specific surface area, controllable pore size and morphology, and high interparticle connectivity, are among that owed by mesoporous materials. These attributes have been attracted researcher to engineer for further enhancement of the surface and to provide diffusion, charge, or l...

Ionic liquids are considered as emergent pollutants as these compounds possess high persistent in aqueous solution and toxicity toward aquatic organism. In this work, the adsorption equilibrium of 27 ionic liquids, with different cation head group, alkyl chain length, and anion, onto ZSM-5 were measured experimentally at several composition and at...

Metal-organic frameworks (MOFs) are promising crystalline materials for various application due to their controllable porous structure and large specific surface area. Their properties can be further improved by several means, such as making a binary MOF comprising of two different MOFs. In this research, UiO-66/HKUST-1 composites have been synthes...

The comparison of photocatalytic decolorization of Methylene Blue and Methyl Orange using ZnO Semiconductor under UV-LED radiation has been studied at varied pH. ZnO have been synthesized using co-precipitation method. The Scanning Electron Microscopy (SEM) result showed that the synthesized ZnO has a hexagonal structure with the particle size rang...

A preliminary study of the effect of magnesium-doped into betanine-sensitized TiO2 thin layers has been carried out computationally and experimentally. The computational calculation was performed to observe the effect of magnesium on the interaction molecular of betanine onto TiO2 surface, using Ti12O28H8 model cluster. It was found out that the di...

Nitroxide radical redox-couple compounds have the potentials to be applied as a redox couple in dye-sensitized solar cell applications since their standard reduction potential reached almost 1 V. Unfortunately, many reports revealed the limitations of nitroxide in dye-sensitized solar cell applications. This study investigates the interaction betwe...

The determination of redox potential (E°) was performed by computational study with variation of correlation-function B3LYP, CAM-B3LYP and ωb97-XD for pipiridine, azaadamantane and azaphenalene of nitroxide radical compounds with DFT method. The basis set of 6-13G(d) was used for geometry optimization and frequency calculation. The results showed t...

The effect of the addition electron donating moiety –OCH3, -NHCH3, -OC5H11 and –NH(C5H11) to the electronic properties of carbazole dye, CT2 have been studied using DFT and TDDFT method at CAM-B3LYP level theory and 6-31G* basis set. The optimized structure were obtained from DFT calculation, whilst electronic properties were obtained using single...

In this study, chitosan phthaloyl were introduced as matrices to improve the conductivity of membrane based on novel proton channelled by phthaloyl groups. The addition of phthaloyl groups was reduced methanol crossover and increased hydrophobic properties. Phthaloyl chitosan has been synthesized through reaction of chitosan with phthalic anhydride...

This introductory chapter discusses the rapid development of nanotechnology for the application of visible light-induced photocatalysis, which is driven by the unique material properties arising from the nanoscale dimensions. It includes the description of the carbon-based nanomaterials developed first in the early development such as fullerene, ca...

A combined computational and experimental study has been performed to investigate the best carbazole dyes for iodide- and cobalt-based DSSCs. TDDFT calculations have been implemented to figure out the electronic properties of three kinds of carbazole dyes, namely SD4, JM1 and JM2. These carbazole dyes have similar structures and their main differen...

Progresses in dye-sensitized solar cells (DSSCs) have revealed limitations due to Ī/I3̄ redox shuttle and the necessity of its replacement. Cobalt-complexe redox species are the most promising alternatives for the application. In the present work, we have optimized the preparation of solar cells based on a Co-complex redox shuttle and Z907 Ru-compl...

Trois types des ETLs ont été développés et étudiés dans cette travaille comme une photoélectrode dans la cellule solaire à colorant (DSSC). Ils sont composés de (1) deux types de nanoparticules de TiO2-brookite, (2) le composite d'anatase et graphène et (3) la nanoparticule de ZnO qui a nanobâtonnet structure, respectivement. Toutes photoélectrodes...

A ruthenium polypyridyl dye containing a hexasulfanyl-styryl modified bipyridyl group as ancillary ligand, coded TG6, is investigated as a sensitizer for ZnO-based dye-sensitized solar cells (DSSCs). The advantages of this dye are a broad wavelength absorption spectrum, a large loading in ZnO photoelectrodes, a significantly larger extinction coeff...

The photoactivity of the stable nanosized TiO2 polymorphs is challenging for many advanced applications. In the present work, brookite TiO2 nanoparticles with two different shapes have been used as building blocks for the preparation of pure brookite mesoporous layers. The layers have been characterized before and after sensitization. They have bee...

A simple and effective method has been developed to prepare a composite porous film that incorporates graphene sheets and anatase TiO2 nanoparticles. After sensitization, the films have been investigated as dye-sensitized solar cell photoelectrodes. The cell performances showed that the incorporation of an optimized graphene content of 1.2 wt % inc...

Forced hydrolysis in polyol medium is a versatile synthesis method for the preparation of metal oxide particles with controlled properties. We investigated the D149-dye-sensitized solar cell (DSSC) performance of ZnO film electrodes prepared with four different types of nanoparticles having various sizes and morphologies. The photoanode dye loading...