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All Journal Program Kreativitas Mahasiswa - Penelitian Alchemy Jurnal Penelitian Kimia Communications in Science and Technology Jurnal Abdi Masyarakat Indonesia Jurnal Abdimas Kartika Wijayakusuma Empowerment Society
Sayekti Wahyuningsih
Kimia Anorganik Material, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sebelas Maret
Humanities Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Public Health Social Sciences Other

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PENINGKATAN AKTIVITAS FOTOKATALITIK TiO2 MESOPORI DENGAN SENSITISASI TiO2 MENGGUNAKAN SENYAWA KOMPLEKS BERWARNA Wahyuningsih, Sayekti; Kartini, Indriana; Narsito, Narsito
Alchemy Jurnal Penelitian Kimia Vol 7, No 1 (2008)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Peningkatan aktivitas fotokatalitik TiO2 mesopori telah dapat dilakukan dengan modifikasi permukaan TiO2 melalui penambahan senyawa kompleks berwarna M2+ (SiPA)n(PAR)m (M2+ = Co2+ dan Fe2+) (SiPA = sililpropilamin). Penambahan senyawa kompleks sensitiser pada permukaan TiO2 dilakukan dengan cara pembentukan senyawa kompleks in situ dengan penambahan berturut-turut ligan primer aminopropiltrimetoksisilan (APTS), Ion logam transisi (Co2+ atau Fe2+) dan ligan sekunder 4-(2-piridilazo)resorsinol (PAR). Dibandingkan dengan TiO2 mesopori sebelum disensitisasi, TiO2 setelah disensitisasi (TiO2/SiPA-Co2+-PAR dan TiO2/SiPA-Fe2+ -PAR) menunjukan peningkatan aktivitas fotokatalitik  ~20% untuk fotodegradasi metilen blue dengan radiasi cahaya visibel.
PERANAN ZEOLIT NANOPORI TERMODIFIKASI SEBAGAI MATERIAL PENGONTROL PELEPASAN PUPUK UREA Hidayat, Rahmat; Fadillah, Ganjar; Chasanah, Uswatul; Wahyuningsih, Sayekti
Program Kreativitas Mahasiswa - Penelitian PKM-P 2014
Publisher : Ditlitabmas, Ditjen DIKTI, Kemdikbud RI

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Abstract

Effectiveness of catalyst zeolite nanoporous as a slow release fertilizer of nitrogen from urea has been researched. In this study, natural zeolite was activated by HF 1%  with a calsination temperature at 120oC and the surface of zeolite was modified by aminopropyltrimethoxysilane (APTMS) 5%. Zeolite activation was characterized by X-ray diffraction spectroscopy (XRD) and Surface Area Analyzer (SAA) while the modified zeolite was characterized by infrared spectroscopy (FTIR), Surface Area Analyzer (SAA) and UV-Vis spectroscopy. The results of the material characterization of zeolite-APTMS obtained size pore of 7,74 nm with a maximum adsorption capacity of urea was 3.668 mg/g. Slow release urea test  from zeolite-APTMS performed by observing the absorbance of the urea at a wavelength of 195 nm with a variation of time 0, 5,10,20,40,60,80,100 and 120 minutes The test of fertilizers in the soil is directly done by observing changes pH and release of NH4+ in the incubation time of 14 days. The results show that urea without zeolite will be released 100% in the 120 minute and zeolite-APTMS aqueous solution at minute 120 only released about 56,24%. While the application of fertilizers in the soil is directly obtained that urea with zeolite having a pH decrease slowly compared to urea without zeolite. It is addressed that the zeolite-APTMS potentially be developed as a release control material of nitrogen from urea is caused due to the ability of the zeolite to absorb urea-APTMS temporarily in the pore and hydrogen bonding interactions between the urea and N-H from APTMS. Keywords:  zeolite, zeolite-APTMS, urea, slow release fertilizer
Rice husk ash-based selective absorbent with imprinted ionic for gold recovery Hastuti, Sri; Fajariani, Ema N.; Candraningrum, Intan K.; Martini, Tri; Wahyuningsih, Sayekti; Aini, Fitri N.
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1461

Abstract

The recovery of gold from aqueous solutions is crucial due to its economic value and environmental significance, making effective separation technologies essential. To tackle this challenge, development of an adsorbent with enhanced selectivity and high adsorption capacity against Au(III) is highly crucial. This present study harnessed rice husk derived-silica functionalized by (3-trimethoxysilyl)propyldiethylenetriamine (TMPDT) using imprinted ionic method to form SiO2-TMPDT-Au-Imp, specifically designed for the selective adsorption of Au(III). SiO2-TMPDT-Au-Imp demonstrated a significantly higher adsorption capacity about 387% improvement compared to SiO2-TMPDT, highlighting its superior performance. Furthermore, in addition to exhibit several advantageous characteristics that surpass those of other materials tested, underscoring its effectiveness in Au(III) adsorption. SiO2-TMPDT-Au-Imp displayed notable selectivity in competitive metal ion solutions with the preference order of Au(III)/Fe(III) < Au(III)/Cu(II) < Au(III)/Zn(II). The developed SiO2-TMPDT-Au-Imp, in brief, represents a promising advancement in the field of material science and environmental remediation in which it offers a tailored solution for efficient and selective adsorption of Au(III). This study can also be applied for the recovery of Au(III) ions from electronic waste.
Investigation of hexanal removal through adsorption and photocatalysis on ZIF-7 modified with ZnO, TiO\(_2\), and ZnO/TiO\(_2\) using ATR-FTIR Naufal, Widyan Muhammad; Wahyuningsih, Sayekti; Lestari, Witri Wahyu
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1505

Abstract

Zeolitic imidazolate framework (ZIF) is renowned for its high adsorption capacity and frequently adsorbs organic pollutants. However, its high band gap energy has limited its photocatalytic activity, thus necessitating a modification for enhance performance enhancement. This study focuses on developing a ZIF-7 composite material that integrates adsorption and photocatalysis to remove volatile organic compounds (VOCs), particularly hexanal. Modifications were made by incorporating ZnO, TiO2, and ZnO/TiO2 via a solvothermal method using dimethylformamide (DMF). ATR-FTIR analysis was employed to monitor any changes in peak intensity related to the C=O vibrations of hexanal around 1700 cm-1. The results showed that all samples effectively adsorbed hexanal, reducing peak intensity after UV irradiation, and confirming successful photocatalysis. Notably, TiO2@ZIF-7 exhibited the highest photocatalytic performance with 88.06% degradation efficiency. This study confirms that the ATR-FTIR method can be used to monitor the success of adsorption and photocatalysis and shows the potential for developing composite materials to remove VOCs such as hexanal.
Peningkatan Kualitas Produksi Ecoprint Corak Pewarna Alam melalui Pendampingan Proses Teknik Pewarnaan di UMKM Ecorilife.Id Wahyuningsih, Sayekti; Rahardjo, Sentot Budi; Lestar, Witri Wahyu; Saraswati, Teguh Endah; Widjonarko, Dian Maruto; Pramono, Edi; Naufal, Widyan Muhammad; Faradilla, Radianita
Jurnal Abdi Masyarakat Indonesia Vol 5 No 1 (2025): JAMSI - Januari 2025
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.1301

Abstract

Ecorilife.id merupakan salah satu UMKM yang bergerak pada bidang produksi ecoprint. Akan tetapi, terdapat permasalahan prioritas dari mitra, yaitu kualitas warna pada produksi kain ecoprint yang tidak stabil, meliputi pewarnaan dasar gelap dan terang, pengaruh teknis pewarnaan, dan penggunaan bahan-bahan pewarna alam. Solusi yang diharapkan mampu menyelesaikan permasalahan tersebut dilakukan melalui pendampingan proses produksi ecoprint pada Ecorilife.id. Kegiatan tersebut dilakukan dengan melakukan optimasi pada tahap pewarnaan dan mordanting menggunaan tawas (Al2(SO4)3), natrium asetat (Na-acetat), atau soda abu (Na2CO3) supaya produk ecoprint memiliki warna yang tidak mudah luntur serta bercampur secara sempurna dengan kain. Pewarna dasar kain dioptimasi dengan pewarna alam tingi dan jolawe. Tahapan pewarnaan ecoprint dilakukan dengan teknik steaming setelah tahap mordanting yang kemudian dikeringkan. Tahap pewarnaan dan pembentukan motif dilakukan dengan menggunakan motif yang muncul dari daun jati, daun akalipa, daun kalpataru, dan bunga cosmos. Fiksasi dilakukan dengan kapur untuk menghasilkan warna-warna ecoprint yang jelas. Hasil menunjukkan terciptanya produk ecoprint dengan kualitas warna tinggi yang dapat diamati melalui hasil pewarnaan yang terlihat detail, tidak berbaur, dan tidak luntur.
Pelatihan Pembuatan Teknologi Kombinasi Pupuk Dasar Dengan Sistem Lepas Lambat (Slow Release) Melalui Pencampuran Zeolit Alam Pada Kelompok Tani Karangpandan Pramono, Edi; Wahyuningsih, Sayekti; Lestari, Witri Wahyu; Saraswati, Teguh Endah; Widjonarko, Dian Maruto; Raharjo, Sentot Budi; Rahayu, Rahayu; Venny, Venny; Basith, Abdul; Zetadini, Reza; Melina, Dika Caesar; Wulandari, Resa
Jurnal Abdimas Kartika Wijayakusuma Vol 4 No 2 (2023): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v4i2.360

Abstract

Permasalahan kelangkaan pupuk dan penggunaan pupuk kimia sintetik secara berlebih sering muncul dalam pertanian. Hal ini terjadi pula pada sistem pertanian hortikultura di daerah Karangpandan Kabupaten Karanganyar. Perlu adanya edukasi tentang pentingnya manajemen penggunaan pupuk yang baik untuk menghemat dan menjaga kualitas lahan pertanian. Pada kegiatan ini tim pengabdi memberikan penyuluhan dan pelatihan pembuatan pupuk lepas lambat atau slow release guna memberikan pemahaman pemanfaatan material anorganik alam dalam penghematan pupuk kimia sintetik. Kegiatan ini diawali dengan pemaparan materi zeolit dan manfaatnya bagi pertanian dan dilanjutkan dengan pelatihan pembuatan pupuk kombinasi zeolit. Dari pelatihan ini diperoleh bahwa masyarakat menjadi paham akan bahaya pemakaian pupuk sintetik berlebih dan manfaat zeolit bagi pertanian. Pelatihan menjadikan anggota kelompok tani mampu menyiapkan pupuk dengan kombinasi zeolit. Dari survey juga diperoleh bahwa masyarakat tertarik untuk memanfaatkan teknologi campuran pupuk tersebut guna menghemat pemakaian pupuk. Dari kegiatan ini diharapkan teknologi yang dikembangkan di universitas mampu memberikan kontribusi bagi masyarakat tani khususnya pada teknologi pupuk slow release berbasis zeolit alam dan dapat diterapkan bagi kelompok tani pada skala yang lebih besar.
Ecoprint Business Development at Newcoral Ecofriendly UMKM trhough Improving Production, Management and Marketing Quality Wahyuningsih, Sayekti; Rahmawati, Rahmawati; Amperawati, Endang Dwi; Samsi, Samsi; Paramita, Ratna Wijayanti Daniar
IMPOWERMENT SOCIETY Vol 8 No 2 (2025): Agustus 2025
Publisher : Institut Teknologi dan Bisnis Widya Gama Lumajang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30741/eps.v8i2.1536

Abstract

Micro, Small, and Medium Enterprises (MSMEs) newcoral ecofriendly is a business engaged in the production of other ecoprints based on natural materials such as leaves, twigs, flowers, and roots. The ecoprint products produced have high artistic value and are environmentally friendly, making them one of the leading business opportunities in the creative industry. However, this MSME faces a number of problems that hinder business development, including inconsistent production quality, less structured business management, and limited marketing strategies. The method implemented in community partnership empowerment-based service in the form of workshop activities, mentoring in ecoprint making practices, providing training related to management governance and marketing processes, as well as monitoring and evaluation. This program is expected to produce outputs in the form of scientific publications, media publications, and videos. Through this activity, Usaha Mikro, Kecil, dan Menengah (UMKM) newcoral ecofriendly is expected to be able to increase competitiveness and contribute to the development of environmentally friendly creative industries in Indonesia.
Co-Authors Abdul Basith Abu Masykur Aini, Fitri N. Amperawati, Endang Dwi Ari Handono Ramelan Arin Khoirul Hidayah, Arin Khoirul Candra Purnawan Candraningrum, Intan K. Dian Maruto Widjonarko Edi Pramono Eko Sulistiyono, Eko Fajariani, Ema N. Faradilla, Radianita Florentinus Firdiyono Ganjar Fadillah, Ganjar Gracia Dian Sidharta, Gracia Dian Hajar Prasetyo, Hajar Hari Hidayatullah, Hari Indriana Kartini Jati Wulansari, Jati Kusumastuti . Lestar, Witri Wahyu Lestari, Witri Wahyu Melina, Dika Caesar Narsito Narsito Naufal, Widyan Muhammad Raen Finnah, Raen Rahayu Rahayu Rahmat Hidayat Rahmawati, Rahmawati Ratna Wijayanti Daniar Paramita Samsi Samsi Sentot Budi Rahardjo Sentot Budi Raharjo Soerya Dewi Marliyana Solly Aryza Sony Atmojo, Sony Teguh Endah Saraswati Tri Martini Uswatul Chasanah, Uswatul Venny, Venny Wulandari, Resa Yuniawan Hidayat Zetadini, Reza