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All Journal SAINS TANAH - Journal of Soil Science and Agroclimatology Communications in Science and Technology Jurnal Kartika Kimia Journal of Fibers and Polymer Composites Jurnal Pengabdian Isola Jurnal Riset dan Praktik Pendidikan Kimia al Kimiya : Jurnal Ilmu Kimia dan Terapan
Nurhayati, Mita
Universitas Pendidikan Indonesia
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology Other

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Synthesis and Characterization of PES/PEG/PVA/SiO2 Nanocomposite Ultrafiltration Membrane Silvia Widiyanti; Mita Nurhayati; Hendrawan Hendrawan; Boon Seng Ooi; Fitri Khoerunnisa
Journal of Fibers and Polymer Composites Vol. 2 No. 2 (2023): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v2i2.120

Abstract

This study aims to synthesis and characterize PES/PEG/PVA/SiO2 composite membranes. The composite membranes were synthesized by phase inversion method with composition (% w/w) Polyethersulfone/ PES (17.25), Polyvinylalcohol/ PVA (3.58; 0.85; 1.43; 2.57; 3.57, Polyethylene glycol/ PEG (3.72), Silica/SiO2 (0.35; 0.85; 1.43; 2.57; 3.57), and Dimethyl acetamide/DMAc solvent. Composite membranes were characterized using FTIR spectroscopy, X-ray diffraction, Scanning Electron Microscopy (SEM), and water contact angle. The results showed that the interaction between PES, PVA, and SiO2 was indicated by a shift in the typical absorption spectrum of the FTIR. SEM cross-sectional photos showed that the addition of PVA and SiO2 caused significant changes in the morphology and pore structure of the PES membrane. The results of the X-ray diffractogram (X-Ray) showed a shift in the typical diffraction peaks of PES, PEG, PVA and the presence of new diffraction peaks of SiO2. The crystallinity of the membrane increased from 34.99% to 57.25% which indicated that the composite membrane was successfully synthesized. The addition of PEG/PVA/SiO2 also increased the hydrophilicity of the composite membrane. Based on these findings, it can be concluded that the PES/PEG/PVA/SiO2 composite membrane has been synthesized through the phase inversion method with the optimum composition of PES: PEG: PVA: SiO2 was 17.25%: 3.72%: 0.85%: 0.35%, respectively. The addition of PEG/PVA/SiO2 increased the hydrophilicity and modified the morphological structure of the PES membrane.
Analisis Kebutuhan Materi Kimia Untuk Siswa SMK Kompetensi Keahlian Agribisnis Tanaman Pangan dan Hortikultura Hera Herlina; Sjaeful Anwar; Mita Nurhayati
Jurnal Riset dan Praktik Pendidikan Kimia Vol 11, No 2 (2023)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jrppk.v11i2.64277

Abstract

Penelitian ini bertujuan untuk mengidentifikasi kebutuhan materi kimia siswa SMK kompetensi keahlian Agribisnis Tanaman Pangan dan Hortikultura (ATPH) yang diharapkan dapat menghasilkan outline bahan ajar kimia yang sesuai untuk siswa SMK kompetensi keahlian ATPH. Penelitian ini menerapkan metode penelitian deskriptif evaluatif dengan pendekatan kualitatif. Hasil penelitian menunjukan bahwa: 1) Materi kimia berdasarkan kurikulum 2013 sudah memenuhi kebutuhan materi kejuruan, namun perlu adanya penyesuaian dari kedalaman dan penguatan konsep pada masing-masing materi kimia. 2) Peta materi kimia yang dibutuhkan untuk menunjang kompetensi siswa SMK kompetensi keahlian ATPH memuat materi kimia dengan konteks ATPH yang relevan.3) Ruang lingkup materi kimia yang dibutuhkan untuk siswa SMK kompetensi keahlian ATPH dibuat berdasarkan materi kimia, materi prasyarat, dan konteks ATPH disusun dalam bentuk outline.
Thermodynamics Theoretical Investigation for Synthesis of Pyridine from Pyrylium Salt using Density Functional Theory Khoiriah, Selmi F.; Aprianto, Agil; Kania, Putri; Fauzi, Rafi N.; Nurhayati, Mita
Jurnal Kartika Kimia Vol 5 No 2 (2022): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v5i2.178

Abstract

Pyridine is a heterocyclic compound that is widely used as an ingredient in medicines, vitamins, food flavors, pesticides, dyes, adhesives, and others. Currently, pyridine synthesis is carried out with coal tar as a raw material, which is a non-renewable natural resource. In this research, a theoretical study was carried out to evaluate the synthesis process of pyridine using pyrylium salt as an alternative raw material to displace coal tar. This study also aims to simulate the pyridine synthesis and the energy required or released in the process. Density Functional Theory (DFT) method was employed to calculate some thermodynamic properties of the species involved in the reaction such as enthalpy, entropy, and Gibbs free energy in a vacuum and solvated model in order to study the progress of the reaction and mechanism. Based on the calculation results, the lowest value of enthalpy, entropy, and free energy Gibbs is obtained when the reaction takes place in a vacuum. The change of entropy and free Gibbs energy of the reaction was not predominantly affected by the degree of polarity of the solvent. Meanwhile, the enthalpy of reaction simulated in water solvent is higher than in the ethanol solvent. The synthesis reaction of pyridine from pyrylium salt is exothermic and exergonic because it has a negative value of enthalpy change and Gibbs free energy at 298.15 K, which is potential to be done at room temperature without extreme condition control.
Synthesis and Characterization of Calcium Oxide Nanoparticles and Their Application in the Adsorption of Indigo Carmine Maharani, Brigitta Stacia; Khoerunnisa, Fitri; Anwar, Budiman; Hendrawan, Hendrawan; Hamidah, Ida; Nurhayati, Mita; Sanjaya, Eli Hendrik
Jurnal Kartika Kimia Vol 7 No 1 (2024): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v7i1.253

Abstract

This research aims to determine the optimum conditions for the synthesis of CaO nanoparticles using the coprecipitation method, determine the characteristics of the CaO nanoparticles synthesized, and determine the effect of the performance of CaO nanoparticles as an adsorbent for indigo carmine dyes. CaO nanoparticles were successfully synthesized using the coprecipitation method at the optimum conditions of 1 M NaOH concentration and formation temperature of 400+200℃ with the highest % yield reaching 74.56%. The successful formation of CaO nanoparticles was proven by the appearance of a 2-theta diffraction peak of 23.12°; 39.2°; 57.9°; and 67.2° which is identical to the lattice structure of CaO with hkl indices (200), (311), (422) and (600) and a crystal size of up to 4.96 nm. SEM images support the formation of CaO nanoparticles with an average particle size of 98.1 nm and a varying size distribution. The IR spectrum of the formation of CaO nanoparticles with the appearance of Ca-O peaks at wavelengths of 3640, 1400, 860, and 791 cm-1. The adsorption capacity of indigo carmine on CaO nanoparticles was greatest at an adsorbent dose of 10 mg, adsorbate concentration of 100 ppm and a contact time of 50 minutes. The most appropriate adsorption isotherm model and adsorption kinetics model was the Koble-Corrigan model and the pseudo second order model, respectively.
A Systematic Review: Chitosan/ Poly (vinyl alcohol) based Hydrogel composites for Drug Delivery Material Annifah, Riri Uswatun; Kadarohman, Asep; Khoerunnisa, Fitri; Nurhayati, Mita; Hendrawan, Hendrawan; Anwar, Budiman
Jurnal Kartika Kimia Vol 7 No 1 (2024): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v7i1.254

Abstract

This review article aims to systematically describe the synthesis methods, characterization, and performances of CS/PVA based hydrogel composites as drug delivery materials. The literature review was conducted through ScienceDirect and Google Scholar, where the article selection is based on Scopus index in the Q1 and Q2 categories within the past 5 years. The synthesis of CS/PVA hydrogel was performed using various methods, including crosslinking, freeze-thaw, and sol-gel. The synthesis methods of hydrogel composites included crosslinking, freeze-thaw, and sol-gel. Characterization of hydrogel composites was conducted using FTIR spectroscopy, SEM, and swelling ratio measurement. CS/PVA-based hydrogel composites as drug delivery materials have been successfully synthesized using crosslinker, freeze-thaw and sol-gel methods. FTIR spectra indicated that drug was successfully loaded into CS/PVA based hydrogel composite matrix, involving the hydrogen bonding as predominant mechanism of interaction between precursors and drug functionalities. The best swelling capacity was obtained in the CS/PVA/Tetracycline based hydrogel composites, up to 949%. The SEM images indicated the homogeneous morphological structure and surface of hydrogel composites. The CS/PVA/Tetracycline based hydrogel composites exhibited the largest cumulative drug release of 99.44%. The drugs loaded CS/PVA hydrogel composites are promising as a drug delivery material.
A Review: Synthesis, Recent Application and Future Challenge of SiO2 Nanoparticles in Membrane Technology Widiyanti, Silvia; Iasha, Yurin Karunia Apsha Albaina; Ashfiya, Putri Sayyida; Khoerunnisa, Fitri; Nurhayati, Mita; Hendrawan, Hendrawan; Sonjaya, Yaya; Aziz, Hafiz Aji
Jurnal Kartika Kimia Vol 7 No 1 (2024): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v7i1.255

Abstract

Membrane processes are well-established methods in real water treatment, renowned for their compact size, exceptional treatment effectiveness, and substantial water permeation capacity. The emergence of nanomaterials has ushered in thrilling prospects and progress in the membrane technology. Silica nanoparticles (NPs SiO2), a high-purity amorphous silica powder, is a white fluffy material characterized by its small particle size, and it brings numerous benefits due to its distinctive attributes. With a large specific surface area, strong surface adsorption, considerable surface energy, high chemical purity, and excellent dispersion, it holds significant value in diverse areas like medicine, physics, chemistry, and biology. NPs-SiO2 can be categorized into hydrophilic and hydrophobic types, which offers difference application in the membrane technology. In this review, NPs-SiO2 contained membranes are specifically discussed. The main goal is to provide critical analysis on recent application of SiO2 in membrane technology. Apart from the introduction and conclusion, this review has three consecutive parts including The synthesis methods of NPs-SiO2 contained membrane including size of the NPs-SiO2 that is mostly used in membranes, the application of the hydrophobic and hydrophilic NPs-SiO2 in the membrane technology, and the future challenge of NPs-SiO2 used in membrane technology.
Workshop on Deepening Materials and Designing Learning Plans with Problem-Based Learning (PBL) Models on Thermochemical Materials [Workshop Pendalaman Materi dan Perancangan Rencana Pembelajaran dengan Model Problem-Based Learning (PBL) Pada Materi Termokimia] Yuliani, Galuh; Hendrawan, Hendrawan; Mulyani, Sri; Rohman, Ijang; Setiabudi, Agus; Nurhayati, Mita; Lathifah, Siti Maulani
Jurnal Pengabdian Isola Vol 1, No 2 (2022): JPI: VOLUME 1, ISSUE 2, 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpi.v1i2.52381

Abstract

Guru kimia disyaratkan untuk memiliki 4 kompetensi yang mencakup kompetensi pedagogik, kepribadian, sosial dan profesional. Beberapa keterbatasan guru yang telah teridentifikasi diantaranya adalah masih lemahnya literasi dan kemampuan berfikir kritis, yang menyebabkan pembelajaran kimia lebih bersifat teoritis. Hal ini menjadi salah satu penyebab rendahnya minat dan motivasi siswa untuk mempelajari kimia. Untuk mengatasi hal ini, perlu dilakukan kegiatan penyegaran dan pendalaman materi bagi guru, sehingga diharapkan guru menjadi lebih percaya diri dalam menyajikan pembelajaran kimia yang menarik dan relevan dengan kehidupan sehari-hari. Workshop dilakukan dengan mengadopsi model pembelajaran Problem-based Learning (PBL) untuk memberikan pengalaman kepada guru dalam bertindak sebagai fasilitator untuk memberikan rangsangan kepada siswa dalam mempelajari kimia. Materi termokimia dipilih karena merupakan stimulus yang baik dalam menyelesaikan masalah pada fenomena sehari-hari melalui pengetahuan kimia. Melalui workshop ini, dihasilkan luaran berupa analisis kurikulum serta strategi pembelajaran materi termokimia yang siap diaplikasikan oleh guru.Chemistry teachers are required to have four competencies which include pedagogic, personality, social and professional competencies. Some of the teacher's limitations that have been identified are weak literacy and critical thinking skills, which causes chemistry learning to be more theoretical. This is one of the causes of the low interest and motivation of students to study chemistry. To overcome this, it is necessary to conduct workshop and deepen the material for teachers, so that teachers are expected to become more confident in presenting chemistry lessons that are interesting and relevant to everyday life. The workshop was carried out by adopting a Problem-based Learning (PBL) learning model to provide experience for teachers as facilitators that stimulates students in chemistry learning. Thermochemistry topic was chosen because it is a good stimulus in solving problems in everyday phenomena through chemical knowledge. Through this workshop, outputs are produced in the form of curriculum analysis and learning strategies for thermochemical materials that are ready to be applied by teachers.
EVALUATION OF MINERAL-BASED HYDROXYAPATITE/ZnO COMPOSITES AS PHOTOCATALISTS FOR METHYLEN BLUE DEGRADATION Hardian, Arie; Nafisah, Aulia Zakiyatun; Karya, Teguh; Halim, Riyan; Murniati, Anceu; Syarif, Dani Gustaman; Noviyanti, Atiek Rostika; Nurhayati, Mita; Jasmansyah, Jasmansyah; Reza, Muhammad
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 11, No 2 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i2.37886

Abstract

The use of dyes in the textile industry has increased significantly, raising concerns about their potential to pollute the environment and harm human health. Methylene blue is a widely used synthetic dye, necessitating effective methods for its degradation. Photodegradation is a promising approach to decompose dyes into simpler, less harmful compounds. In this study, hydroxyapatite combined with ZnO was employed as a photocatalyst material to enhance photocatalytic performance. The research aims to degrade methylene blue using a Hydroxyapatite/ZnO (HAp/ZnO) nanocomposite through photodegradation. The optimization of the photodegradation process was investigated by varying irradiation time, methylene blue concentration, and pH. The optimum degradation of methylene blue was achieved using 20 mg of HAp/ZnO nanocomposite at an irradiation time of 120 minutes, an initial methylene blue concentration of 5 ppm, and pH 7. Adsorption isotherm modeling revealed that the process followed the Langmuir isotherm model, with a maximum adsorption capacity (qmax) of 0.3353 mg/g. The degradation followed pseudo-second-order kinetics with a reaction rate constant of 4.0026×105 L/mol·s.
Review on Synthesis, Properties, and Performances of Polymer/ Metal Organic Framework (MOF) composites membranes for water filtration application Ashfiya, Putri Sayyida; Khoerunnisa, Fitri; Nurhayati, Mita; Kadarohman, Asep; Sanjaya, Eli Hendrik; Hendrawan, Hendrawan; Sonjaya, Yaya; Aziz, Hafiz Aji; Annifah, Riri Uswatun; Iasya, Yurin Karunia Apsha Albaina
Jurnal Kartika Kimia Vol 8 No 1 (2025): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i1.871

Abstract

Mixed matrix membranes (MMMs) have gained considerable attention as a cutting-edge filtration technology, leveraging the combined advantages of polymer and inorganic fillers. Metal-organic frameworks (MOFs), as a nanoporous materials, are regarded as highly effective fillers in MMM, significantly enhancing molecular separation efficiency. This article provides a comprehensive review of the synthesis, properties, and performance of polymer/MOFs-based MMMs. A comprehensive literature search was conducted using ScienceDirect and Google Scholar with keywords such as metal-organic framework, MMMs, polymers, filler, and membrane filtration. Polymer/MOFs-based MMMs are synthesized using techniques including in situ and layer-by-layer assembly methods. The MMMs exhibit porosity distribution ranges from57 to 78.3%, contact angle ranges from 45° to 75.27°. The MMMs have also demonstrated exceptional performance in water permeability and bovine serum albumin (BSA)/salts rejection reached up to 94.03 L/m2.h and 99.8%, respectively. These finding highlight the significant potential of polymer/MOFs-based MMMs for advanced water filtration application.
Synergetic effect of ZnO/NiO nanocomposite on the enhancement of photocatalytic degradation efficiency of dyes molecules Iasya, Yurin Karunia Apsha Albaina; Khoerunnisa, Fitri; Dwi, Sadina Sahitya; Putri, Restiani Alia; Nurhayati, Mita; Arrozi , Ubed Sonai Fahruddin; Permana, Yessi; Handayani, Murni; Astuti, Wijayanti Dwi; Da, Oh Wen; Irnanda, Istifhamy
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1583

Abstract

The discharge of organic dyes into water systems poses severe risks to human health and aquatic ecosystems. A remarkable technique that is increasingly recognized for dyes degradation is photocatalysis. This work aims to investigate the role of zinc oxide/nickel oxide (ZnO/NiO) nanocomposites in enhancing photocatalytic degradation efficiency of dyes molecules. The nanocomposites were prepared using a simple ultrasonication technique and analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The XRD pattern of the ZnO/NiO nanocomposites exhibited characteristic peaks aligned with the ZnO and NiO phases, referring to JCPDS standards. The SEM images of nanocomposites featured the rod and irregular flake-like structures with the average size of 80 nm. The nanocomposites showed the highest dye photodegradation efficiency (RB 93.65% and MO 94.82%) in view of a larger semicircular diameter and lowest band gap energy as verified by Nyquist plot and DFT calculation. These results emphasized the synergistic effect of ZnO/NiO nanocomposites in promoting dye photocatalytic degradation.
Co-Authors Agus Setiabudi Anceu Murniati Annifah, Riri Uswatun Aprianto, Agil Arie Hardian Arrozi , Ubed Sonai Fahruddin Asep Kadarohman Asep Suryatna Ashfiya, Putri Sayyida Astuti, Wijayanti Dwi Atiek Rostika Noviyanti Aziz, Hafiz Aji Boon Seng Ooi Budiman Anwar Da, Oh Wen Dani Gustaman Syarif Dwi, Sadina Sahitya Eli Hendrik Sanjaya Fauzi, Rafi N. Fitri Khoerunnisa Ganesan, Shangeetha Gebi Dwiyanti Halim, Riyan Hendrawan Hendrawan Hendrawan Hendrawan Hera Herlina Iasha, Yurin Karunia Apsha Albaina Iasya, Yurin Karunia Apsha Albaina Ida Hamidah Ijang Rohman Irnanda, Istifhamy Jasmansyah, Jasmansyah Karina, Suci Karya, Teguh Khoiriah, Selmi F. Lathifah, Siti Maulani Maharani, Brigitta Stacia Mollah, Mamun Mr Sjaeful Anwar Muhammad Reza Murni Handayani Mutiara, Siska Nafisah, Aulia Zakiyatun putri kania, putri Putri, Restiani Alia Silvia Widiyanti Sri Mulyani Widiyanti, Silvia Yaya Sonjaya Yessi Permana Yuliani, Galuh