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All Journal Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Kimia Riset Indonesian Journal of Chemistry Bubungan Tinggi: Jurnal Pengabdian Masyarakat Jurnal Layanan Masyarakat (Journal of Public Service) Greensphere: Journal of Environmental Chemistry Bulletin of Chemical Reaction Engineering & Catalysis Andan Jejama: Indonesian Journal Of Community Engagement
Alfa Akustia Widati
Department Of Chemistry, Faculty Of Science And Technology, Universitas Airlangga
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Environmental Science Public Health Social Sciences Other

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Pelapisan Superhidrofobik Metiltrimetoksisilan-Silika-Titania (MTMS-SIO2-TIO2) pada Batu Andesit Widati, Alfa Akustia; WAHYUNI, SITI NUR; ILHAMI, MUHAMMAD HAEKAL NUR
Greensphere: Journal of Environmental Chemistry Vol 3, No 2 (2023): Volume 3 Issue 2 Tahun 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gjec.2023.20949

Abstract

Permasalahan polutan dan kondisi lingkungan seperti cahaya, kelembaban, sinar matahari dapat merusak dan memperpendek usia bangunan yang tersusun oleh bebatuan. Dengan demikian, perlu adanya teknologi self cleaning untuk melindungi bangunan dari kerusakan. Dalam penelitian ini, digunakan MTMS-nanosilika-nanotitania sebagai material self cleaning superhidrofobik yang dilapiskan pada batu andesit. Nanotitania disintesis menggunakan metode sol gel. Nanosilika disintesis menggunakan metode Stöber. Metiltrimetoksisilan (MTMS) ditambahkan sebagai coupling agent dan agen hidrofobik. Metode pelapisan yang digunakan adalah dip coating. Karakterisasi nanotitaniadan nanosilika hasil sintesis dilakukan menggunakan X-Ray Diffraction (XRD) dan Particle Size Analyzer  (PSA). Batu andesit yang terlapisi di uji sudut kontak, dikarakterisasi menggunakan Spektroskopi Infra Merah (FTIR) dan Vickers, serta diuji kemampuan self cleaning. Penelitian menggunakan komposisi nanosilika/nanotitania 7:3 dan dengan waktu perendaman selama 5 menit. Kondisi optimum yang diperoleh untuk uji self cleaning adalah MTMS-nanosilika-nanotitaniakarena menghasilkan sifat superhidrofobik pada permukaan batu dengan sudut kontak 169,76˚. Batu andesit yang dilapisi MTMS-nanosilika-nanotitaniamemiliki kemampuan self cleaning dengan mendegradasi methyl orange sebesar 91,46%.
COMMUNITY DEVELOPMENT THROUGH EDUCATION ON THE PROCESSING OF HOUSEHOLD WASTE INTO COMMERCIAL PRODUCTS Widati, Alfa Akustia; Adiarto, Tokok; Zakki Fahmi, Mochamad; Budi Prasetyo, Antonius; Darmokoesoemo, Handoko; Supriyanto, Ganden; Sumarsih, Sri; Purwaningsih, Aning; Khasanah, Miratul; Hartati, Hartati; Baktir, Afaf; Hadi, Sofijan; Purkan, Purkan; Raharjo, Yanuardi; Khairunnisa, Fatiha; A'yuni, Qurrota; Tri Puspaningsih, Ni Nyoman; Hwei Voon, Lee
Jurnal Layanan Masyarakat (Journal of Public Services) Vol. 8 No. 3 (2024): JURNAL LAYANAN MASYARAKAT
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jlm.v8i3.2024.329-338

Abstract

Community empowerment and household waste processing are two issues that need to be resolved by the government. An independent and educated society is an important pillar to support the development of country. Meanwhile, waste that continues to accumulate without processing has a negative impact on health and the environment. Public education about household waste processing can be a solution to the two problems above. Education was carried out at Junior High School YBPK Surabaya and residents of Dukuh Kupang Surabaya, and other participants who joined in a hibrid meeting with a total of 116 participants. Activities at YBPK Surabaya took place on 25 March and 5 August 2023 and activities at Dukuh Kupang Surabaya took place on 27 May and 26 August 2023. The types of waste processed are organic waste and used cooking oil, which are then converted into eco-enzymes and used cooking oil Activities are divided into 2 stages. there are community education activities and program sustainability monitoring activities. The community education activities includes presentation and workshop were hold in March 2023 at YBPK Surabaya Middle School and May 2023 at Dukuh Kupang Surabaya. The evaluation of sustainability program including individual practice and monitoring of activities was carried out in August 2023 at Dukuh Kupang Surabaya. Methods for implementing activities include presentation, practice accompanied by a mentor, individual practice, and monitoring program sustainability. Based on the analysis of participants' ability, the participant scores before and after the activity was increase. It means that this training succeeded in increasing participants' knowledge and skills in processing waste, especially organic waste and used cooking oil waste. A total of 72 out of 116 participants (62%) had processed household waste either individually or in groups. Activity evaluation data shows that these activities are necessary and on target to create an independent and creative society.
Carbon Paste Electrode-Modified Imprinted Zeolite X and Its Performance as a Potentiometric and Voltammetric Sensor for Cholesterol Analysis Khasanah, Miratul; Widati, Alfa Akustia; Severia, Nadya Maya; Oktaviana, Citra Marantika Nur; Puspitasari, Evrillia; Ummah, Naftalia Wirdatul; Alviani, Ziana
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99700

Abstract

Carbon paste electrode-modified imprinted zeolite X has been developed as a potentiometry and voltammetry sensor to monitor cholesterol levels in the body. This is crucial to detect early health risks caused by high cholesterol levels. The modified electrode was fabricated with a mass ratio of activated carbon, paraffin, and imprinted zeolite X of 12:7:1. Potentiometric measurement produced a linear dynamic range of 10−6–10−3 M, Nernst factor of 27.12 mV/decade, a detection limit of 1.12 × 10−6 M, precision of 99.7% (n = 3), and accuracy of 99.8% (n = 5). Using the electrode for up to 56 measurements over 6 weeks did not significantly decrease its performance. The presence of glucose did not interfere with cholesterol analysis by potentiometry. The modified electrode was applied to analyze cholesterol voltammetrically at the optimum deposition potential of 0.4 V, deposition time of 60 s, and a scan rate of 100 mV/s. Voltammetric analysis of cholesterol resulted in a detection limit of 7.2 mg/L (1.86 µM), precision of 96–99%, accuracy of 74–114%, sensitivity of 7.1 nA.L/mg/cm2, and recovery of 87.2% (n = 3). The glucose and urea in various concentrations cause less than 5% current deviations.
Enhancing Surface Properties Through the Applications of Silica Superhydrophobic Coating Widati, Alfa Akustia; Salsabilah, Andina Fitriyah; Aisyah, Aisyah; Rahmawati, Zeni; Wan Abdullah, Wan Nazwanie
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99793

Abstract

Superhydrophobic silica coatings have gained enormous attention due to their significant contribution to self-cleaning, anti-fouling, anti-icing, anti-corrosion, and moisture-resistance. This mini-review provides an overview of silica surface modification, including functionalization, roughness control, and deposition methods. Functionalization aims to reach hydrophobic properties by the application of low surface energy compounds. Surface roughness control at the micro- and nano-scale across different scales also results in various surface topographies. The type of deposition technique also influences the coating surface properties, including roughness texture, adhesion, and coating thickness. This paper also explains the challenges and gaps of research rarely reported by previous studies, such as the stability of coating in harsh environments, scalability, cost-effectiveness, and sustainability. Furthermore, this article also addresses promising future innovations in developing long-lasting coatings, multifunctional properties, and economic points of view.
Utilization of Coconut into Virgin Coconut Oil (VCO) to Improve the Economy of the Residents of Kalibatur Village, Tulungagung Widati, Alfa Akustia; Zakki Fahmi, Mochamad; Nanik Siti Aminah; Budi Prasetyo, Antonius; Adiarto, Tokok; Rico Ramadhan
ANDAN JEJAMA: Indonesian Journal of Community Engagement (IJCE) Vol. 4 No. 2 (2025): Indonesian Journal of Community Engagement (IJCE) ANDAN JEJAMA
Publisher : FMIPA Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ijceaj.v4i2.16

Abstract

The coastal community of Sine Beach, Kalibatur Village, Tulungagung, Indonesia, has long thrived on fishing activities. In response to this, a community development service explores the alternative utilization of coconut, particularly the production of Virgin Coconut Oil (VCO), as a means of economic diversification. By integrating scientific principles with local traditions, the community learned to extract VCO and create various coconut-based products. This initiative not only broadened economic horizons but also fostered environmental sustainability. The programs aims to give economic impact to residents in Pantai Sine Tulungagung.
Co-Authors A. Budi Prasetyo Abdulloh Abdulloh AFAF BAKTIR Ahlan Riwahyu Habibi Ahmadi Jaya Permana Aisyah Aisyah Alfinda Novi Kristanti Ali Rohman Alviani, Ziana Anik Fathur Rohmah Aning Purwaningsih Atik Widiyanti Aulianitha Salsabella Bahrotul Ilmiah Bambang Rusdiarso Budi Prasetyo, Antonius Dessy Puspa Aryanti Didik Prasetyoko Eko Sri Kunarti Faiz Tamamy Fatiha Khairunnisa Ganden Supriyanto Handoko Darmokoesoemo Harsasi Setyawati Hartati Hartati Hartati Hartati Hartati Hartati Hwei Voon, Lee ILHAMI, MUHAMMAD HAEKAL NUR Imam Siswanto Indriana Kartini Irene Dinda Oktavia Kariza Makanty Madjid Arie Wibowo Miratul Khasanah Mochamad Zakki Fahmi Muji Harsini Musbahu Adam Ahmad Nanik Siti Aminah Ni Nyoman Tri Puspaningsih Nuryono Nuryono Oktaviana, Citra Marantika Nur Purkan Purkan Purkan Purkan, Purkan Purwaningsih, Aning Puspitasari, Evrillia Qurrota A’yuni Rahmawati, Zeni Rico Ramadhan, Rico Rochadi Prasetya Salsabilah, Andina Fitriyah Satya Candra Wibawa Sakti Severia, Nadya Maya Siti Wafiroh Sofijan Hadi Sri Sumarsih Tanti Kartika Dewi Tokok Adiarto Tokok Ardiarto Ulfa Rahmah Ummah, Naftalia Wirdatul Usreg Sri Handajani WAHYUNI, SITI NUR Wan Abdullah, Wan Nazwanie Yanuardi Raharjo, Yanuardi