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All Journal EKSAKTA: Journal of Sciences and Data Analysis Alchemy : Journal of Chemistry Prosiding Pendidikan Sains Jurnal Kimia dan Kemasan agriTECH IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Jurnal Kimia Terapan Indonesia Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Molluca Journal of Chemistry Education (MJoCE) Jurnal Kimia dan Kemasan Journal of Multidisciplinary Applied Natural Science Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Natural Jurnal Manusia dan Lingkungan Molekul: Jurnal Ilmiah Kimia JURNAL REKAYASA KIMIA & LINGKUNGAN
Nurul Hidayat Aprilita
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Gadjah Mada Sekip Utara, Yogyakarta 55281
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Neuroscience Physics Social Sciences

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Effect of Annealing and Etching Times on Anatase TiO2 Hollow Sphere Rakhman, Khusna Arif; Aprilita, Nurul Hidayat; Kartini, Indriana
Molekul Vol 18 No 2 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.2.7480

Abstract

The development of high-efficiency photocatalysts plays an important role in the application of solar energy conversion. Titanium dioxide (TiO2) with an anatase crystalline phase is well-known as semiconductor thin layers for solar cells. This work has constructed a novel TiO2 hollow sphere (HST) in a 2-step synthesis. The first step is coating the SiO2 template with TiO2 to build a core-shell of SiO2@TiO2 (CSST). The second step is etching via sonication to elute the SiO2 from CSST and construct the HST. The annealing of CSST for 1 to 6 hours and etching for 1 to 7 hours has resulted in the HST with different crystallite sizes and microstrains. The HST of ~90 nm has been fabricated with crystallite size of 9.53 to 20.54 nm and microstrain from 0.34 to 3.42. It was found that the optimum crystallite size and microstrain of HST obtained via annealing the CSST for 2 hours and etching for 5 hours has the best photooxidation of I- under UV irradiation. The optimum crystallite size and microstrain of HST via annealing and etching times can be recommended for the future of solar cell fabrication and applications.
Enhancement of TiO2 Photocatalyst Using Rare Earth Oxide (La2O3) via a Simple Preparation Method for Degradation of Methylene Blue under Visible Light Natsir, Taufik Abdillah; Pamungkas, Alam Reformasi Putra; Aprilita, Nurul Hidayat
Molekul Vol 19 No 1 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.1.8467

Abstract

The modification of TiO2 using rare earth oxide (La2O3) to increase the photodegradation activity of TiO2 under visible light has been conducted. The goal of this research is to identify the influence of La2O3 on the TiO2 to the photocatalytic activity of TiO2. The mixed oxide of TiO2/La2O3 was prepared using the precipitation method. The as-prepared catalyst was then calcined at 923 K. The photocatalyst was characterized using SRUV, XRD, FTIR, and SEM-EDX. The results showed that the photocatalyst activity of TiO2/La2O3-923 under visible light in the degradation of methylene blue was higher than pristine TiO2. The decrease in bandgap energy of TiO2/La2O3-923 from 3.2 eV to 3.01 eV was not the main factor in the increase of photocatalytic activity of TiO2/La2O3-923. The optimum condition of photodegradation of MB was obtained when the ratio of TiO2/La2O3 was 5, the concentration of MB was 10 ppm, the reaction time was 300 min, and the mass of the photocatalyst was 0.25 g. The reusability of TiO2/La2O3-923 was stable up to 3 sequent runs with the MB photodegradation of more than 90%. The mechanistic study of the mixed oxide TiO2/La2O3 showed that the hydroxyl radical played an important role in its high photocatalytic. Keywords: TiO2-La2O3, photocatalyst, visible light, methylene blue
Adsorption of Cationic Malachite Green Dye using Easily Separated Adsorbent of Magnetized Coal Fly Ash Romadhona, Miftakhul; Aprilita, Nurul Hidayat; Mudasir, Mudasir
Molekul Vol 19 No 3 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.3.11756

Abstract

A study on the synthesis of magnetized adsorbents from coal fly ash (FA) for the adsorption of malachite green (MG) dye has been conducted. The method involves acid activation and ferrite magnetization of FA. The activation of FA was performed by mixing it in an HCl solution, while the magnetization was carried out by the coprecipitation method using the molar ratio of 1:2 of Fe2+/Fe3+. The magnetized coal fly ash adsorbent (FA/Fe3O4) was then utilized to adsorb the MG dye, and the results were compared with that adsorbed by activated fly ash (AFA). Characterization of the materials was carried out using Atomic Absorption Spectroscopy (AAS), Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), and Vibrating Sample Magnetometer (VSM). The optimized parameters in the adsorption study were pH, adsorbent mass, contact time, and initial concentration. The optimum conditions for the adsorption of MG dye with AFA and FA/Fe3O4 are obtained at pH 7, the adsorbent mass of 0.1 and 0.25 g respectively, a contact time of 45 minutes, and the initial concentration of MG dye of 175 ppm. The MG adsorption on both adsorbents follows a pseudo-second-order kinetic model and can be best described by the Langmuir isotherm adsorption model. The synthesized adsorbent is prospective as it is low cost and easily separable from the solution using an external magnet after adsorption. Keywords: Adsorption, coal fly ash, magnetite, malachite green
Evaluation of Phenol Transport Using Polymer Inclusion Membrane (PIM) with Polyeugenol as a Carrier Febriasari, Arifina; Siswanta, Dwi; Kiswandono, Agung Abadi; Aprilita, Nurul Hidayat
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 2 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i2.5112

Abstract

A recovery study of phenol with Polymer Inclusion Membranes (PIMs) needs to be evaluated to determine values of transport kinetic parameter, level of stability, and selectivity of the membrane. This paper describes results of the evaluation of phenol transport using PIMs with polyeugenol as a carrier. PIMs were made by mixing polyeugenol, dibenzylether, and polyvinylchloride in a solvent (tetrahydrofuran) then printed in a container with diameter 4.5 cm and allowed to vaporize for 72 hours. Further evaluation studies are conducted at pH 4.5 with various parameters, among of them are various times that were taken to identify parameters of the transport kinetics of phenol, membrane stability, characterization, and testing of membrane selectivity by comparing transport of phenol with another compound, in this study chromium is used. This study results in calculation of values of transport kinetics of membrane permeability obtained at 8.8 x 10-5 m/s, flux value of 9.512 x 10-4 g/m2s, and diffusion coefficient of 3.826 x 10-11 m2/s. Repeating use over three times, 48 hours, indicates reduction in power of phenol transport by 70.81%. While selectivity test indicates that membrane is used more selectively against phenol than chromium metal. Based on study results, phenol transport effectiveness using PIM with polyeugenol as carrier is 91.4% in optimum condition.
Enhanced Visible-Light Photocatalytic Degradation of Amoxicillin using TiO2-Cu/N with Copper Sourced from Electroplating Wastewater Suwondo, Kusuma Putri; Wahyuni, Endang Tri; Aprilita, Nurul Hidayat; Jafaar, Nur Farhana; Alharissa, Early Zahwa
Journal of Multidisciplinary Applied Natural Science Articles in Press
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.353

Abstract

The growing prevalence of pharmaceutical contaminants, particularly amoxicillin (AMX), in aquatic environments poses serious threats to both ecosystems and public health. Addressing this issue requires the development of efficient photocatalysts capable of degrading such pollutants under visible-light irradiation. This study explores the enhanced photocatalytic degradation of AMX under visible light using copper and nitrogen co-doped titanium dioxide (TiO₂-Cu/N) synthesized utilizing copper recovered from electroplating wastewater. Comprehensive characterization through XRD, UV-Visible DRS, and TEM demonstrated that a Cu doping level of 0.60%, combined with 30% nitrogen co-doping and calcination at 500 °C, resulted in the most significant enhancement in photocatalytic activity under visible-light irradiation, attributed to the most effective bandgap narrowing. Notably, the TiO₂-Cu/N photocatalyst with optimized composition exhibited superior physicochemical properties and photocatalytic performance compared to its singly doped counterparts. The optimal condition of the AMX degradation was achieved using 100 mg of TiO₂-Cu/N to treat 100 mL of a 20 mg/L AMX solution at pH 6 under 2 h of visible-light irradiation, which was 90%. Furthermore, the Cu dopant in the TiO₂-Cu/N matrix remained stable during the photocatalytic process, as evidenced by the sustained activity even after three consecutive cycles. Additionally, the use of radical scavengers confirmed that hydroxyl radicals (•OH) were the predominant reactive species responsible for the degradation of amoxicillin. These findings highlight the promising potential of utilizing industrial wastewater as a dopant source for the sustainable development of high-performance photocatalysts in water treatment applications.
Co-Authors Adhitasari Suratman Agung Abadi Kiswandono Ahmad Nasir Pulungan Alharissa, Early Zahwa An Nissa F. Hayu An Nissa F. Hayu, An Nissa F. Bambang Rusdiarso Bambang Sutriyanto Bella Mellisani Beti Wulandari Candra Purnawan Christian W Huck Christian W Huck Dhian Nuri Bawani Dwi Siswanta Dwi Siswanta Dwi Siswanta Dwi Siswanta Eko Sri Kunarti Eko Suguharto Endang Tri Wahyuni Endang Tri Wahyuni Endang Tri Wahyuni Endang Tri Wahyuni Endang Tri Wahyuni Febriasari, Arifina Febriasari, Arifina Firda Ainun Nissa Fitrilia Silvianti Girsang, Ermi Guenther K Bonn Guenther K Bonn Hani Prima Rasydta Hasri Hasri Indriana Kartini Indriana Kartini Indriana Kartini Indriana Kartini Indriana Kartini Isna Nurhidayati Jafaar, Nur Farhana Juniva Laila Sihombing, Juniva Laila Khusna Arif Rakhman, Khusna Arif Kinichi Morita Kuntari Kuntari Kusuma Putri Suwondo Mai Anugrahwati Marcelina Marcelina Mardiyah Kurniasih Mudasir Mudasir Mudasir Mudasir Mudasir Mudasir Mudasir Mudasir Muhammad Syahrir Nindya Tri Muliawati Nuryono Nuryono Pamungkas, Alam Reformasi Putra Rambat Rambat Rambat, Rambat Rania Bakry Rania Bakry Romadhona, Miftakhul Roto Roto Roto Roto Sarwendah Ratnawati Hermanto Satriyo Krido Wahono Satriyo Krido Wahono Siti Nurhayati Siti Nurhayati Sofy Herawati Ratnaningtyas Sri Juari Santosa Sri Juari Santosa Sri Juari Santosa Suherman Suherman Suherman, Suherman Sunarti Sunarti Suratno Suratno Suratno Suratno Suwondo, Kusuma Putri Takashi Hayashita Takashi Hayashita Taufik Abdillah Natsir Tri Joko Raharjo Wina Akmarina Wulandari Sutiawan Yuniar Yuniar