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All Journal BERKALA FISIKA SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmiah Arena Tekstil Journal of Physics: Theories and Applications INDONESIAN JOURNAL OF APPLIED PHYSICS Indonesian Journal of Chemistry Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat SEMAR Equilibrium Journal of Chemical Engineering Bulletin of Chemical Reaction Engineering & Catalysis
Hendri Widiyandari
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Sebelas Maret
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Eco-Friendly Synthesis of ZnO/CQD Photocatalysts from Waste Milk for Myclobutanil Degradation under Visible Light Widiyandari, Hendri; Prilita, Orien; Parasdila, Hanaiyah; Suryana, Risa; Arutanti, Osi
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20532

Abstract

Pesticides play a vital role in maintaining the global food supply amid rising agricultural demand and the adverse effects of climate change on crop productivity. Among them, myclobutanil, a triazole-based compound, is commonly used to safeguard plants against fungal diseases. The chemical compounds produced from the high toxicity, mobility, and persistence of pesticides in water can have harmful environmental effects. Food/organic waste has recently gained attention for its potential use in material research, one of them is stale milk. Stale milk contains lactic acid, which can be utilized as a carbon precursor for preparing carbon quantum dot (CQD). In this study, a ZnO/CQD composite photocatalyst was successfully synthesized using CQD derived from stale milk through a green hydrothermal method. The photocatalytic activity of ZnO/CQD in degrading the pesticide myclobutanil was confirmed after 120 min, achieving a degradation efficiency of 30% while ZnO only 18% under visible light, demonstrating its potential as an excellent photocatalyst candidate for the removal of organic pollutants. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Microwave-assisted roasting time on Ilmenite Bangka Belitung extraction using hydrometallurgical method Mutakin, Ikbalul; Suryana, Risa; Septiani, Eka Lutfi; Arutanti, Osi; Widiyandari, Hendri
Journal of Physics: Theories and Applications Vol 8, No 1 (2024): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v8i1.90259

Abstract

Titanium Dioxide (TiO2) was extracted from Bangka Ilmenite through a hydrometallurgical process employing the microwave-assisted method using a 20% HCl solution. The highest crystallinity percentage in XRD result, reaching 75%, was achieved after a roasting duration of 25 minutes, with a corresponding crystallite size of  35.57 nm at the TiO2-Anatase phase's peak intensity of 25.24°. Analysis of the extracted ilmenite revealed alterations in its compound composition, notably an increase in TiO2 content. The most substantial increase in TiO2 content, rising to 69.7% from 33.76%, was observed after 25 minutes of roasting. UV–Vis spectroscopy revealed an energy band gap of 2.329 eV.
Pengaruh Penggunaan Binder terhadap Densitas dan Kalor Pembakaran Briket dari Limbah Sagu Widiyandari, Hendri; Setiabudi, Wahyu; Subagio, Agus; Haryanti, Sri; Siahaan, Parsaoran; Tjahjana, Heru
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 02 (2013): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i02.1270

Abstract

Biomass fuel such as briquette is one of an alternative energy regarded to the shortage of the fosil fuel and rising its prices. The byproduct of sago starch industry is the waste that remain the environmental problem because of the odor. However this agricultur waste such as trunk cortex and fibre has a potential application as a raw material for briquette.The fibre and trunk cortex act as matrix material of briquette. The utilizing of sago waste as a biomass briquette and the effect of ratio of matrix/binder to the density, time of compustion and gross heat of the briquette have been elucidated sistematically. The analyzing of gross heat using adiabatic calorimetry indicated that the briquette prepared with the ratio of binder/matrix of 3:4 (mass ratio) had the maximum value of 3929.5 kal/g. The duration of combusion was proposional with density of the briquette.
Polyvinylidene fluoride (PVDF) Nanofiber Modified Current Collector in Anode-Free Lithium Battery Widiyandari, Hendri; DinaPanuntun, Adama; Parasdila, Hanaiyah; Firdaus, Iqbal; Purwanto, Agus
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 1 (2024): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i1.78679

Abstract

In order to coat the layer of the Cu for an anode-free lithium battery (AFLB) and examine AFLB performance, PVDF nanofiber with electrospinning is used. The fabrication time and molecular weight of the nanofiber can be modified. In comparison to conventional models, the AFLB is one of the new model options that provides great energy density at the same battery size. The disadvantages of this new model battery include its limited electrochemical performance and the fact that it is still in its initial stages of manufacturing. Low Coulombic efficiency and uncontrolled dendritic growth are challenges in the growth of AFLB. For the fabrication of nanofiber membranes were synthesized with different types of PVDF Mw 1.300.000 and 534.000, PVDF Nanofibers were made using electrospinning with time variations of 5 hours, 7 hours, and 9 hours, and their thermal, mechanical, and porosity properties were examined. The PVDF Mw 1.300.000 sample had the greatest porosity percentage value which is 47.031% during a 9-hour time. The PVDF Mw 534.000 sample had the highest tensile strength results, with a variation of 2.33 MPa during a 9-hour time. The PVDF Mw 1.300.000 sample had the highest percentage elongation results, 39.7%. The average nanofiber size varies with processing time, with the PVDF Mw 1.300.000 sample having the smallest size at 167.9 nm.
Sosialisasi dan Kinerja Pemasangan CCTV Berbasis Panel Surya sebagai Pengaman Lingkungan di Desa Triyagan, Jawa Tengah Supriyanto, Agus; Suryana, Risa; Nurosyid, Fahru; Iriani, Yofentina; Kusumandari, Kusumandari; Widiyandari, Hendri; Khairuddin, Khairuddin; Nurmala, Dina Siti; Dewi, Galuh Anjani Kirana; Her Rekenalita, Imevia; Putri, Karini Kayala; Putri, Safitri Amalia
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 2 (2025): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i2.109479

Abstract

Kegiatan sosialisasi kinerja Closed Circuit Television (CCTV) berbasis energi surya dilaksanakan di Desa Triyagan, kecamatan Mojolaban kabupaten Sukoharjo.  Kedgiatan ini sebagai upaya peningkatan keamanan lingkungan dengan teknologi yang efektif, efisien, dan ramah lingkungan. Tujuan utama kegiatan ini adalah memberikan pemahaman kepada masyarakat mengenai manfaat, cara kerja, dan keunggulan sistem CCTV yang menggunakan panel surya sebagai sumber energi utama. Teknologi ini memungkinkan sistem pengawasan lingkungan beroperasi secara mandiri tanpa ketergantungan terhadap pasokan listrik PLN.  Metode sosialisasi meliputi penyuluhan, demonstrasi langsung, dan diskusi interaktif bersama masyarakat dan aparat desa. Hasil kegiatan menunjukkan adanya peningkatan pengetahuan dan kesadaran masyarakat terhadap pentingnya penggunaan teknologi ramah lingkungan dalam menjaga keamanan desa. Program ini diharapkan menjadi model penerapan teknologi hijau untuk sistem keamanan lingkungan yang berkelanjutan di tingkat desa.
Edukasi Pengelolaan Sampah Organik di Yayasan Pendidikan Mutiara Insan Menuju Sekolah Berwawasan Mandiri Energi Kusumandari, Kusumandari; Suryana, Risa; Iriani, Yofentina; Nurosyid, Fahru; Widiyandari, Hendri; Khairuddin, Khairuddin
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 12, No 2 (2023): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v12i2.77098

Abstract

Sampah selalu menjadi permasalahan yang tak kunjung usai dan menjadi perhatian serius pemerintah Indonesia. Kesadaran masyarakat Indonesia dalam pengelolaan sampah masih harus terus ditingkatkan. Secara umum sampah dapat dikategorikan sebagai sampah organik dan non organik. Kedua jenis sampah tersebut sejatinya dapat dimanfaatkan lagi. Sebagai contoh dengan mendaur ulang sampah plastik menjadi barang-barang yang bermanfaat seperti vas bunga, pot, tempat pensil dan lain sebagainya Sedangkan sampah organik dapat dimanfaatkan untuk membuat pupuk kompos atau bahkan untuk sampah organik dalam jumlah banyak dapat dimanfaatkan sebagai sumber energi baru biogas. Oleh karenanya dalam usulan pengabdian ini, akan dilakukan edukasi pengelolaan sampah organik di Yayasan Pendidikan Mutiara Insan Sukoharjo. Yayasan Pendidikan Mutiara Insan membawahi beberapa institusi pendidikan yaitu SMPIT Mutiara Insan, SDIT Mutiara Insan dan TKIT/PAUD Mutiara Insan. Sebagai lembaga Pendidikan dengan kurikulum fullday, yayasan menerapkan kebijakan pemberian katering snack maupun makan siang setiap harinya. Selain berdampak positif, hal tersebut tentunya menimbulkan masalah karena banyaknya sampah organik yang berasal dari potongan sayuran maupun sisa makanan siswa. Berdasarkan latar belakang tersebut, maka diperlukan edukasi untuk membangun kesadaran pengelolaan sampah organik tersebut. Edukasi dengan pemberian materi in class tentang pengelolaan sampah menjadi energi alternatif biogas. Kegiatan diikuti oleh pemangku kebijakan dari Yayasan Mutiara Insan dan juga perwakilan pemerintah setempat. Dari hasil pelatihan, peserta merasa mendapatkan pencerahan mengenai sampah organik sebagai sumber energi alternatif dan siap mendukung penerapannya di Yayasan Mutiara Insan sebagai usaha mewujudkan sekolah yang berwawasan mandiir energi. Dari pengabdian ini diharapkan masyarakat mendapatkan kemanfaatan edukasi dan teknologi tepat guna dalam usaha pengelolaan sampah khususnya sampah organik. 
Pengembangan Energi Alternatif Biogas dari Sampah Organik di Desa Wonorejo Polokarto Sukoharjo Kusumandari, Kusumandari; Suryana, Risa; Iriani, Yofentina; Nurosyid, Fahru; Widiyandari, Hendri; Khairuddin, Khairuddin; Yunianto, Mohtar; Praptomo, Mokhamad Sahid
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 1 (2025): Mei
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i1.94019

Abstract

Permasalahan sampah di Indonesia menjadi perhatian serius pemerintah. Berbagai usaha pengelolaan sampah dilakukan untuk mengurangi penumpukan sampah. Salah satunya dengan pengelolaan sampah jenis organik menjadi sumber energi alternatif yaitu biogas. Dalam rangka kegiatan pengabdian kepada masyarakat, dilakukan pengolahan sampah organik menjadi energi alternatif Biogas. Kegiatan pengabdian dilakukan di Desa Wonorejo Polokarto Sukoharjo. Desa Wonorejo terdiri atas beberapa dukuh dengan total penduduk berjumlah 5783 orang. Selain rumah penduduk, di desa Wonorejo juga terdapat beberapa institusi Pendidikan mulai dari SD sampai SMA dan juga pondok pesantren dibawah Muhammadiyah. Oleh karenanya wilayah desa Wonorejo termasuk wilayah yang padat penduduk dengan beban sampah yang dihasilkan per hari yang cukup banyak. Sampah tersebut terdiri atas sampah organik dan non organik. Untuk sampah non organik warga dapat mengumpulkannya dan menjual ke pengepul sampah non organik. Tetapi untuk sampah organik, penduduk masih menghadapi kendala karena belum dapat mengolahnya menjadi sesuatu yang lebih bermanfaat. Oleh karenanya pengolahan limbah organik menjadi biogas menjadi salah satu alternatif untuk mengatasi masalah tersebut. Pengolahan dimulai dengan pembuatan biodigester sebagai reaktor tempat terbentuknya gas, kemudian pengisian dengan starter dan uji fungsional. Dari pengabdian ini diharapkan masyarakat mendapatkan kemanfaatan teknologi tepat guna untuk menunjang kehidupan dalam usaha pengelolaan sampah khususnya sampah organik.
Training of Electric Bike Assembly with Lithium Batteries at SMK Muhammadiyah 6 Karanganyar Paramitha, Tika; Dyartanti, Endah Retno; Widiyandari, Hendri; Jumari, Arif; Nur, Adrian; Inayati, Inayati; Budiman, Anatta Wahyu; Purwanto, Agus
Equilibrium Journal of Chemical Engineering Vol 5, No 1 (2021): Volume 5, No 1 July 2021
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v5i1.53965

Abstract

With the increasing development of the battery and electric vehicle industry, student's and teacher's understanding of lithium batteries and skills in assembling electric bikes are very important in competing for jobs in these fields. Educational activities regarding batteries and training on assembling electric bike are carried out at SMK Muhammadiyah 6 Karanganyar, because there were no facilities that support the learning and teaching process about electric vehicles and batteries. The method used in this training is lecture, discussion and practice method. The material presented was about the technology of making lithium batteries and electric bike components. While practical activities include the stages of converting conventional bikes into electric bikes with energy from lithium batteries. This activity shows that participants can understand batteries and can apply batteries to electric vehicles, especially electric bikes.
Co-Authors Adrian Nur Adrian Nur AGUS PURWANTO Agus Purwanto Agus Subagio Agus Supriyanto Ahmas Sudin, Ahmas Alfi Nur Aini Almas, Khanza Fadhilah Anatta Wahyu Budiman Aninda Artatriska Meilana Arif Jumari Arutanti, Osi Budiman, Anatta Wahyu Burhanudin Syam Cornelius Satria Yudha Cornelius Satria Yudha Dewi Ratnasari Dewi, Galuh Anjani Kirana Didik Setyo Widodo DinaPanuntun, Adama Endah Retno Dyartanti Endah Retno Dyartanti, Endah Retno Fahru Nurosyid Fahru Nurosyid Firdaus, Iqbal Her Rekenalita, Imevia Inayati Inayati Jumari, Arif Khairuddin - Khairul Anami Kusumandari Kusumandari Kusumandari, Kusumandari Linggar Tungga Gupita Luthfi Mufidatul Hasanah Luthfi Mufidatul Hasanah Metri Setyaningsih Mitha Dea Anggistia Mohtar Yunianto, Mohtar Muhammad Nashir Musni Ahyani, Musni Mutakin, Ikbalul Nurmala, Dina Siti Nurwijayanti Parasdila, Hanaiyah Pardoyo Pardoyo Parsaoran Siahaan Praptomo, Mokhamad Sahid Prilita, Orien Prisca Putri Elesta Purwanto, Agus Putri, Karini Kayala Putri, Safitri Amalia Ratna Balgis Redemtus Heru Tjahjana Risa Suryana Risa Suryana Septiani, Eka Lutfi Soraya Ulfa Muzayanha Soraya Ulfa Muzayanha Sri Haryanti Tatang Wahyudi, Tatang Tika Paramitha Tika Paramitha Wahyu Setia Budi Yayuk Astuti Yofentina Iriani Yofentina Iriani Zaenul Muhlisin