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All Journal Jurnal Inovasi Pendidikan Kimia Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) JPS Unimus J-PAI: Jurnal Pendidikan Agama Islam Chemistry in Education Indonesian Journal of Chemical Science JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) INKUIRI : Jurnal Pendidikan IPA ELSE (Elementary School Education Journal) : Jurnal Pendidikan dan Pembelajaran Sekolah Dasar Jurnal Pendidikan Fisika dan Keilmuan (JPFK) IJCER (International Journal of Chemistry Education Research) International Journal of Pedagogy and Teacher Education ABDIMAS SILIWANGI JMIE (Journal of Madrasah Ibtidaiyah Education) JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Fundadikdas (Fundamental Pendidikan Dasar) Cendekia : Jurnal Pengabdian Masyarakat Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Variabel At-Thullab : Jurnal Pendidikan Guru Madrasah Ibtidaiyah Awwaliyah Shihatuna : Jurnal Pengabdian Kesehatan Masyarakat Journal of Integrated Elementary Education PSEJ (Pancasakti Science Education Journal) UNESA Journal of Chemical Education Prosiding Seminar Nasional Pascasarjana Proceeding of International Conference on Science, Education, and Technology ZAHRA: Research and Tought Elementary School of Islam Journal Journal of Innovative and Creativity Al-Bidayah : jurnal pendidikan dasar Islam Unnes Science Education Journal Indonesian Journal of Chemical Science Jurnal Abdimas MUDARRISA: Jurnal Kajian Pendidikan Islam Journal of Research on Community Engagement Jurnal Inovasi Pendidikan Kimia Jurnal Dharma Indonesia Chemistry in Education
Sigit Priatmoko
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Sintesis Ni-Tio2 Dan Nio-Tio2 Dan Aktivitasnya Dalam Degradasi Metilen Biru Priatmoko, Sigit; Subagja, Didi; Widiarti, Nuni
Indonesian Journal of Chemical Science Vol 6 No 1 (2017)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v6i1.14518

Abstract

Telah dilakukan sintesis Ni-TiO2 dan NiO-TiO2 dengan metode sol gel. Komposit Ni-TiO2 dan NiO-TiO2 disintesis dari prekursor Titanium Isopropoksida dan (Ni(NO3)2.6H2O. Proses kalsinasi dilakukan dengan variasi urutan proses oksidasi-reduksi dan temperatur kalsinasi. Proses oksidasi-reduksi menghasilkan material Ni-TiO2, proses reduksi-oksidasi menghasilkan material NiO-TiO2. Hasil analisis XRD menunjukan ukuran terkecil partikel Ni-TiO2 yaitu 7,44 nm dan NiO-TiO2 yaitu 8,53 nm. Penambahan dopan menyebabkan band gap TiO2 menjadi lebih kecil. Band gap terkecil akibat dopan Ni yaitu 2,68 eV sedangkan band gap terkecil akibat penambahan dopan NiO yaitu 2,81 eV. Hasil SEM-EDX menunjukan permukaan TiO2 terdopan Ni dan NiO lebih kecil dan halus dibandingkan TiO2 tanpa dopan. Material hasil sintesis kemudian digunakan untuk uji aktivitas fotokatalitik yaitu degradasi metilen biru. Degradasi metilen biru terbesar pada TiO2 terdopan Ni sebesar 76,93%, sedangkan degradasi metilen biru terbesar pada TiO2 terdopan NiO sebesar 80,63%.
Konversi Gondorukem menjadi Fine Chemicals melalui Reaksi Hydrocracking Menggunakan Katalis Ni-Mo/γ-Al2O3 Jayanti, Yeni Fitriana; Savitri, Savitri; Rinaldi, Nino; Priatmoko, Sigit; Jumaeri, Jumaeri
Indonesian Journal of Chemical Science Vol 6 No 3 (2017)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v6i3.16605

Abstract

A preliminary study of the conversion of rosin oil to fine chemicals through hydrocracking reactions using Ni-Mo/γ-Al2O3 catalysts has been studied. The purpose of this study was to determine the effect of temperature, initial pressure of hydrogen gas, and reaction time to the reaction of hydrocracking of rosin oil to produce fine chemicals. Hydrocracking of rosin oil is performed on a batch autoclave reactor by varying the reaction temperature (300-350 °C), hydrogen gas pressure (10-40 bar), and reaction time (60-240 min). The amount of Ni-Mo/γ-Al2O3 catalyst used is 1% w/w of rosin oil. The results showed that the compounds contained in rosin oil experienced hydrocracking reaction with the use of high reaction temperature. The use of low hydrogen gas pressure is able to split of rosin oil into fine chemicals, whereas the long reaction time results in the rosin oil being crushed producing more products. The hydrocracking reaction of rosin oil using Ni-Mo/γ-Al2O3 catalyst produces the optimum product if high temperatures used with low hydrogen gas usage and reaction time are used relatively long.
SINTESIS FOTOKATALIS Fe-N-TiO2 MENGGUNAKAN METODE SOL-GEL UNTUK DEKOMPOSISI AIR Sadewo, Ragil Pandu; Harjito, Harjito; Priatmoko, Sigit
Indonesian Journal of Chemical Science Vol 7 No 1 (2018)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v7i1.19199

Abstract

Fotokatalis Fe-N-TiO2 telah digunakan dalam dekomposisi air untuk memproduksi hidrogen. Modifikasi templating agent dan dopan bertujuan untuk mengetahui kompisisi optimum dengan karakterisasi terbaik dan laju produksi terbanyak pada cahaya tampak. Fe-N-TiO2 disintesis menggunakan metode sol-gel dengan persen berat PEG dan N bervariasi. Variasi PEG adalah 2, 3, dan 4% sedangkan N adalah 20, 25, dan 30%w/w. Fotokatalis dikarakterisasi menggunakan DR-UV untuk mengetahui band gap, XRD untuk mengetahui kristalinitas, dan FTIR untuk mengetahui gugus fungsi. Gas hidrogen dari dekomposisi air dianalisis menggunakan GC-TCD. Fe-N-TiO2 dengan N 20%w/w dapat menurunkan band gap hingga 2,56 eV. Fotokatalis dengan PEG 4% mempercepat waktu gelasi menjadi 164,33 jam. Perhitungan fase anatas PEG adalah 86,86% sedangkan ukuran kristalitnya 44,26 nm. Fe-N-TiO2 yang disintesis memiliki serapan utama pada 520 cm-1 yang merupakan daerah Ti-O. Dari uji aktivitas, Fe-N-TiO2 dengan PEG 2% dan N 20%w/w memproduksi hidrogen sebesar 0,076 µmol/jam.
PENGARUH KONSENTRASI SO42- DAN pH TERHADAP DEGRADASI CONGO RED MENGGUNAKAN FOTOKATALIS N-TiO2 UTOMO, WIDYO; Sumarni, Woro; Priatmoko, Sigit
Indonesian Journal of Chemical Science Vol 7 No 1 (2018)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v7i1.19890

Abstract

Congo Red merupakan salah satu zat warna yang terdapat pada limbah industri tekstil. Metode untuk menurunkan kadar Congo Red pada limbah cair adalah dengan metode fotodegradasi menggunakan fotokatalis TiO2. TiO2 memiliki energi gap yang besar, oleh karena hal tersebut TiO2 dimodifikasi dengan cara mendoping Nitrogen ke dalamnya guna menurunkan energi gap tersebut. N-TiO2 dibuat dengan metode Sol-Gel dari prekursor TiIPP, kemudian ditambah Urea ke dalamnya sebagai dopan N. Karakteristik katalis dianalisis menggunakan X-ray difraction, FTIR, dan SEM-EDX. Efektivitas fotodegradasi dilihat dari konsentrasi Congo Red setelah didegradasi pada variasi waktu kontak, penambahan ion sulfat (SO42-) dan pH larutan Congo Red. N-TiO2 efektif digunakan untuk fotodegradasi Congo Red pada waktu kontak 45 menit. Kemampuan fotokatalis N-TiO2 dalam mendegradasi Congo Red juga dapat ditingkatkan dengan penembahan anion sulfat. Semakin bertambahnya konsentrasi sulfat hingga 5000 mg/L dapat meningkatkan persentase degradasi hingga 79.75%. Pada pH asam kinerja fotokatalis N-TiO2 untuk mendegradasi Congo Red meningkat. Pada pH 5 dapat meningkatkan persentase deegradasi hingga 73.85%.
Pengaruh Jenis Elektrolit Support pada Penurunan Logam Cr dalam Limbah dengan Menggunakan Metode Elektrokoagulasi Amelia, Laksmi Rahmaning; Priatmoko, Sigit; Prasetya, Agung Tri
Indonesian Journal of Chemical Science Vol 8 No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v8i2.22666

Abstract

Telah dilakukan penelitian tentang penambahan elektrolit support untuk menurunkan logam Cr total dalam limbah dengan menggunakan metode elektrokoagulasi. Tujuan penelitian ini untuk menentukan proses elektrokoagulasi yang didapat secara optimum berdasarkan efisiensi penyisihan, energi dan waktu. Pada penelitian ini dilakukan proses elektrokoagulasi dengan K2CrO4 sebagai model limbah artifisial dan Al sebagai elektroda, sehingga diperoleh hasil bahwa elektrolit support paling efektif diantara NaCl, Na2SO4, Na3PO4, NaBr dan NaI adalah larutan NaCl dengan penurunan konsentrasi Cr pada limbah elektroplating sebesar 357,257 ppm dengan prosentase penyisihan 98,28%. Hal ini berbeda dengan hasil penurunan Cr total dari proses elektrokoagulasi K2CrO4 tanpa elektrolit support yaitu hanya sebesar 349,649 ppm dengan prosentase penyisihan 97,70%. Pada proses elektrokoagulasi ditentukan oleh waktu, tegangan serta pH optimal. Waktu optimal dalam proses elektrokoagulasi dalam penelitian ini yaitu dengan waktu operasi selama 180 menit dengan tegangan optimal sebesar 12 volt dan pH optimalnya 5.
PENERAPAN PENDEKATAN INDUKTIF-DEDUKTIF DALAM PEMBELAJARAN MATERI KELARUTAN DAN Ksp Sania, Ratna Zahrotus; Priatmoko, Sigit
Chemistry in Education Vol 3 No 1 (2014): Terbit bulan April 2014
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pembelajaran berpusat pada guru menyebabkan siswa tidak dapat membangun pengetahuannya sendiri sehingga menjadi pasif. Pendekatan induktif-deduktif merupakan pendekatan pembelajaran yang dapat mengaktifkan siswa dalam membangun pengetahuan. Penelitian dilakukan di MAN 1 Magelang pada materi kelarutan dan hasil kali kelarutan. Tujuan dari penelitian ini adalah untuk mengetahui efektivitas pembelajaran dengan pendekatan induktif-deduktif. Populasi penelitian ini adalah seluruh siswa kelas XI IPA MAN 1 Magelang tahun pelajaran 2012/2013. Desain penelitian yang digunakan adalah postest only control design. Teknik sampling yang digunakan yaitu cluster random sampling, dengan kelas XI IPA 4 sebagai kelas eksperimen dan kelas XI IPA 1 sebagai kelas kontrol. Pengujian hipotesis dilakukan menggunakan uji t terhadap nilai posttest. Dari hasil uji hipotesis tersebut diperoleh nilai thitung sebesar 4,99 dan nilai ttabel pada ? = 5% adalah 1,72, yang berarti nilai thitung > ttabel sehingga nilai postest kelas eksperimen sudah mencapai ketuntasan belajar. Pada pengujian proporsi ketuntasan klasikal kelas eksperimen mencapai 86,36% sedangkan pada kelas kontrol hanya 75%. Pada pengujian aspek afektif dan psikomotor, rata-rata nilai hasil belajar kelas eksperimen lebih baik dari kelas kontrol. Berdasarkan hasil penelitian disimpulkan bahwa pembelajaran dengan pendekatan induktif-deduktif efektif pada hasil belajar kimia siswa MAN 1 Magelang pada materi kelarutan dan hasil kali kelarutan.
The Validity of Colloid e-Module Based STEAM Integrated with Socio-scientific Issues Miftahul Ulum; Sudarmin Sudarmin; Sigit Priatmoko
Jurnal Pendidikan dan Pembelajaran Kimia Vol 10, No 3 (2021): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The need for chemistry teaching materials with technological nuances has become a priority learning resource in the current "freedom of learning" era. This study aimed to produce validity of colloid e-module based  STEAM integrated with socio-scientific issues. The method used was research and development (RD) with the ADDIE model (Analysis, Design, Development, Implementation, Evaluations). In this study, the ADDIE stage was only limited to the development stage, namely validity. The validity test was carried out by four raters consisting of two chemistry lecturers and two chemistry teachers. The data obtained were processed using Aiken's V formula. The results of this research are showed that: (1) The validity of colloid e-module in the media aspect obtained the average value of the Aiken' V index is 0.88 with a high category (2) The validity of colloid e-module in the aspect of content obtained the average value of the Aiken 'V index of 0.90 in the high category. It can be concluded that the colloid e-module based on STEAM integrated socio-scientific issue developed is valid. The next stage will be able to be implemented to find out the effectiveness of e-modules and the response of students during chemical learning.Keywords: Validity, Colloid E-Module, STEAM, Socio-scientific IssuesDOI: 10.23960/jppk.v10.i3.2021.12
Characterization of Spent Coffee Grounds in the Community as Supporting Materials for Renewable Energy Muslimah Susilayati; Putut Marwoto; Sigit Priatmoko
Jurnal Penelitian Pendidikan IPA Vol 8 No 2 (2022): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i2.1227

Abstract

Coffee grounds are a by-product of the coffee brewing process. Currently, coffee grounds in the community are still untapped waste. Whereas spent coffee grounds has the potential to be converted into various high value bio-products that are environmentally friendly. This study aims to characterize coffee grounds waste which is popular in the community as a supporting material for renewable energy. This study uses a comparative method of 3 samples of Arabica coffee grounds (SCG-A), Robusta (SCG-R), and the Arabica-Robusta blend (SCG-AR) from coffee brands that are popular in Indonesian. Quantitative analysis was carried out by comparing the percentage of residual yield of the three samples. Qualitative characterization of coffee grounds was carried out using the FTIR 8300/8700 Spectrophotometer. The results of the three samples showed different rendemen values, namely 70% SCG-A, 60% SCG-R, and 80% SCG-AR. The FTIR test results showed that the three spent coffee grounds had the same functional group characteristics in the frequency range of 650–3900 cm-1. The detection of the hydroxyl functional group (-OH), the asymmetric strain of the CH bond of the methyl group (-CH3), and the stretching vibration of CO in the COH bond found in coffee grounds waste shows its potential as a supporting material for renewable energy if a further process is carried out in the form of pyrolysis/calcination at room temperature. 700◦C. Utilization of spent coffee grounds in the community can be done by establishing a Spent Coffee Grounds Bank (SCG Bank), educating the public so that they are willing to donate spent coffee grounds, and managing SCG as a supporting material for renewable energy.
A Study of Sound Materials of Water Hyacinth (Eichhornia Crassipes) as Alternative STEAM Integrated Project-Based Learning Model (PjBL) M. Hidayatur Rohman; Putut Marwoto; Sigit Priatmoko
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 8 No 1 (2022): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 8 Issue 1, J
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.08102

Abstract

This study aims to find an alternative sound-absorbing material from nature that is cheap and environmentally friendly, namely the water hyacinth plant (Eichhornia crassipes). The experimental soundproofing tool from a glass box with a placemat skat was developed by integrating science, technology, engineering, arts, and mathematics (STEAM) elements as an alternative project-based learning model (PjBL) for students. The research method used is experimental. Water hyacinth was sun-dried, woven in the form of a placemat with two variations of the test samples at several frequencies of 250 Hz, 500 Hz, 750 Hz, 1000 Hz, and 1500 Hz. Six stages of PjBL are used, and elements of STEAM are integrated. The results of the study obtained the value of Noise Reduction (NR) of sound for test samples 1, test sample 2, or a combination of test samples 1 and 2. Each test sample is effective at 1500 Hz high frequency; namely, test NR 1 = 8.7 dB, test NR 2 = 8.3 dB, and NR Gab=9.3 dB. The combined test sample was also effective at frequencies of 500 Hz and 750 Hz, with NR Gab=4.3 dB and NR Gab=4.7 dB. Following the theory that changes in sound between 3 to 12 dB have effects that humans can feel. This study concludes that natural water hyacinth fiber has fairly good quality as an alternative sound-dampening material. This experimental tool can also be an alternative to the STEAM-integrated PjBL learning model.
Application of appropriate technology for making hand sanitizer with Citronella Oil Dante Alighiri; Sigit Priatmoko; Samuel Budi Wardhana Kusuma; Sri Nurini; Eko Budi Susatyo
Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Vol 7, No 1 (2022): February 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/abdimas.v7i1.5715

Abstract

The vision of the orphanage is to create a society that is physically and mentally prosperous through empowering underprivileged children, progressively and professionally to form a generation of Khaira Ummah. To support this, the community service team needs to equip the orphanage children with knowledge and skills that are expected to provide creative ideas in entrepreneurship through the application of appropriate technology for the production of hand sanitizer from citronella oil. The resulting hand sanitizer has two functions as a natural hand antiseptic and mosquito repellent. The stages of this community service activity had been carried out by the methods of lectures, discussions, demonstrations, and practices. After the activities were completed, assistance and evaluation of activities were carried out. Almost all participants had been a level of understanding of all community service activities ( 90%) which included knowledge, skills, perception, and motivation. The evaluation of the activities had been carried out by 95s of participants, satisfied with this community service activity. This community Service activity had been succeeded in equipping the orphanage children and supporting the vision of the orphanage of Khaira Ummah.
Co-Authors - Jumaeri Achmad Binadja Ade Yulia Kusuma Dewi, Ade Yulia Kusuma Adi Wijayanto Afwah, Apriliani Arifatul Agung Tri Prasetya Agus Mukti Wibowo Ahmad Minanur Rohim Ahmad Saputra Aini, Febrianti Al Inayah Alighiri, Dante Alika Rindangsari Nurrahmah Almira Syifa Amelia, Laksmi Rahmaning Anang Santoso Andin Vita Amalia, Andin Vita Angga Purnama Ani Rusilowati Antonius Tri Widodo Antuni Wiyarsi Aprilia, Nurkintan Artani, Amalina Ashfa, Ellisa Auliya Auliyansyah, Ach Afrian AZMI, NAUFAL LINA Barianto Nurasri Sudarmawan Basori Basori Cahyo Budi Utomo Damayanti, Yosephine Debbie Dewi Liesnoor Setyowati Dewi, Novi Ratna Didi Subagja, Didi Dimas Gilang Ramadhani, Dimas Gilang Edy Cahyono Eko Budi Susatyo Elisa Yuyun Sariana Endah Suci Amalina, Endah Suci Endang Susilaningsih Endang Susilaningsih Ersanghono Kusuma Fadlilah, Rizki Laili Fitriani, Feby Harits Atika Ariyanta Harjito - Harjono Harjono Harjono Harjono Harjono Hidayah Hidzyam Diniy, Hidayah Hidzyam Inayah, Syarifah Rahmatul Insih Wilujeng Intan Kusumawati Iva Maylana Devi Jayanti, Yeni Fitriana Jayanti, Yeni Fitriana Kasmui -, Kasmui Khoirunnisa Khoirunnisa Larasati, Dhatu Sekar Lestari, Fina Ayu Listiadji, Prasetyo Listiaji, Prasetyo M. Hidayatur Rohman Mahatmanti, F. ‪Widhi Maulida, Faradillah Laili Miftahul Ulum Miftakhudin - Muna, Nala Izzul Muslimah Susilayati Muslimin, Rinandar Mustakim, Siti Salina Binti Nafi’ah, Tsaniyah Nanik Wijayati Nanik Wijayati Nila Agustia Fatimatul Hidayah Nino Rinaldi Noor Rifaan Novia Frida Susgadarsukawati, Novia Frida Nuni Widiarti Nunung Nurhayati Nurma Siyamita Pertiwi Ayu Pamuji Kurniatun, Pertiwi Ayu Pamuji Prasetiyani, Nabila Puji Eka Rahayu Pujiastuti, Rr. Sri Endang Putut Marwoto Qorry Adilla Fikrina Radeni Sukma Indra Dewi Rahman, Sidqi Aulia Rahmawati, Nova Eka Rakainsa, Senda Kartika Ramadhan, Yusuf Rahmad Ratna Ekawati Ratna Zahrotus Sania, Ratna Zahrotus Ratna, Meylita Resti Ana Marsita Ririn Handayani Riyanti Riyanti Rizki Amelia Rosyada, Amroeni Sadewo, Ragil Pandu Sadewo, Ragil Pandu Salsabila, Agisha Salwa Salsabila, Salsabila Samuel Budi Wardhana Kusuma Saptorini Saptorini, Saptorini Saputra, Ahmad Sarwi Sarwi Sasmita, M. Satrio Bekti Uji Prambasto, Satrio Bekti Uji Sauny, Ananta Savitri Savitri, Savitri Seli Triana Putri Senda Kartika Rakainsa Shinta Zulfa Iffani Sholihah, Saidatus Siswahyudianto Siti Sundari Miswadi Soeprodjo - Sri Haryani Sri Kadarwati Sri Nurhayati Sri Nurini Sri Susilogati Sumarti Sri Wahyuni SRI WARDANI Stephani Diah Pamelasari, Stephani Diah Subhan Subhan Subiyanto Hadi Saputro Suci M.Hum SH Hartati Sudarmin Sudarmin Sudarmin Sudarmin Sudarmin Sudarmin Sudarmin Sudarmin Sudarmin Suharto Linuwih Sulistyani, Martin Syahroni, Moch Ilham Syaifuddin Syaifuddin Tjahyo Soebroto Triastuti Sulistyaningsih UTOMO, WIDYO UTOMO, WIDYO Warlan Sugiyo Wicaksono, Ibrahim Widhihastuti, Endah Wiku Aji Sugiri Woro Sumarni YOSEPHINE DEBBIE DAMAYANTI