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All Journal Indonesian Physical Review Jurnal Abdi: Media Pengabdian Kepada Masyarakat Sains dan Matematika Inovasi Fisika Indonesia (IFI) Dedikasi: Journal of Community Engagement and Empowerment Journal of Dedication in Community (JoDiC)
Lydia Rohmawati
Jurusan Fisika, FMIPA, Universitas Negeri Surabaya Gedung C9 Lt. 1, Ketintang, Surabaya 60231
Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Journal : Indonesian Physical Review

 1 
ANALYSIS OF CRYSTALLINE PHASE AND FUNCTIONAL GROUPS OF ZnO FROM PINEAPPLE PEEL EXTRACT Santika, Rosalia; Rohmawati, Lydia
Indonesian Physical Review Vol. 5 No. 3 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i3.160

Abstract

The use of pineapple peel has not been paid attention to because of the lack of public knowledge regarding the content and benefits of pineapple skin. However, it can use pineapple skin for herbal drinks and animal feed. Pineapple peel has phytochemical compounds and bioactive compounds such as ZnO. Therefore, this study was conducted to determine ZnO's crystalline phase and the functional group from pineapple peel extract. Synthesis of ZnO from pineapple peel extract used the green synthesis method, with the following steps: pineapple peel was pounded and stirred by heating at 80°C, and then ultrasonicated. The solution was added with NaOH and centrifuged at 4000 rpm. This result is heated at a temperature of 120°C with a 6 and 12 hours holding time. After that, it cooled to room temperature. The results of XRD analysis obtained the optimal ZnO crystalline phase at a holding time of 12 hours according to the pdf cards database (96-210-7060) and nanocrystalline size of 17.55 nm. The FTIR results on the ZnO sample had an absorption peak of 4000-400cm-1 with functional groups O-H alcohol and phenol, -C=C alkene, C=O, C-O, C-N, and Zn-O. It is hoped to be applied later in the medical and industrial fields by obtaining ZnO samples from pineapple peel extract
PHOTOCATALYST ACTIVITY OF MgO FROM BANGKALAN DOLOMITE Rahmawati, Isna; Rohmawati, Lydia
Indonesian Physical Review Vol. 5 No. 3 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i3.162

Abstract

In the industrial sector, water pollution due to dye waste needs special attention because it can harm humans and the environment. A waste-absorbing material with good photocatalytic properties is required to overcome this problem. The photocatalytic properties are owned by metal oxide materials, one of which is Magnesium Oxide (MgO) material. This study aims to analyze the activity level of MgO photocatalytic from Bangkalan dolomite. MgO synthesis was carried out by the leaching method, where UV-Vis characterized the results to determine the photocatalytic ability of MgO against methylene blue (MB). In this characterization, various treatments (sunlight, UV light, and darkroom conditions) were carried out with radiation times of 180, 240, and 300 minutes. The results of the UV-Vis spectrum analysis showed that MgO had a band gap of 4.01 eV. The degradation efficiency of photocatalytic obtained optimal under sunlight, UV light, and in a dark room with a radiation time of 300 minutes at 82%, 42%, and 34%. Thus, the synthesis of MgO in sunlight showed good photocatalytic activity in reducing MB dye to use for processing waste from the dye industry.
SYNTHESIS OF CALCIUM CARBONATE (CaCO3) FROM EGGSHELL BY CALCINATION METHOD Diningsih, Candra; Rohmawati, Lydia
Indonesian Physical Review Vol. 5 No. 3 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i3.174

Abstract

Calcium is an essential nutrient the human body needs to control blood pressure and maintain strong bones and teeth. One type of calcium that is often consumed and safe for health is calcium carbonate. It can obtain this material from chicken eggshell waste, where it is known that the CaCO3 content is 95%. Therefore, it conducted this research to see the phase, functional group, absorbance level, and energy band gap of CaCO3 samples. CaCO3 was synthesized using the calcination method, in which the egg shells were first soaked in sodium hypochlorite, then dried at 250°C for 10 minutes, and CaCO3 powder was obtained. Then the powder was characterized by XRD, FTIR, and UV-Vis. The results of XRD analysis showed that the calcite phase of CaCO3 was 100% according to the JCPDS PDF of calcite (96-901-6707) with a crystalline size of CaCO3 of 22.6 nm. The results of FTIR of CaCO3 samples at the absorption peak of 4000-500 cm-1 identified the functional groups of Ca-O, C-O, -CH2, and O-H. CaCO3 samples can absorb light at wavelengths of 237.1 nm, 251.5 nm, and 289.7 nm, which have an energy band gap of 3.91 eV. Thus, using this simple calcination method, the CaCO3 sample obtained from the extraction of chicken egg shells can later be applied in the medical field.
FABRIKASI OF Fe3O4/ZnO NANOCOMPOSITE BY ULTRASONICATION METHOD AND ITS APPLICATION FOR ANTIBACTERIAL Oktavia, Anggraini Dwi; Rohmawati, Lydia
Indonesian Physical Review Vol. 5 No. 3 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i3.175

Abstract

The spread of diseases caused by bacteria seriously threatens human health. Alternative materials with antibacterial effects are needed to overcome this problem, such as Fe3O4/ZnO. This study aims to determine the activity of the antibacterial inhibition zone on Fe3O4/ZnO nanocomposites. The Fe3O4/ZnO nanocomposite fabrication used the ultrasonication wave method. Characterization was performed using X-ray diffraction (XRD), Fourier Transforms Infrared (FTIR), and antibacterial activity tests. The results of the XRD analysis showed that the average crystal size was about 42 nm for Fe3O4, 36 nm for ZnO, and 39 nm for Fe3O4/ZnO. The FTIR results on the nanocomposite showed the characteristics of the Fe-O group at the absorption peak of 874.93 and 691.29 cm-1, while at 436.56 cm-1 indicated the presence of Zn-O compound bonds. The Fe3O4/ZnO nanocomposite with a weight ratio (1:10) showed good effectiveness in inhibiting S. aureus and E. coli bacteria at concentrations of 0.8 mg/m and 1 mg/ml. Meanwhile, in E. coli bacteria, the average diameter of the inhibition zone was relatively low. Thus Fe3O4/ZnO nanocomposite has the potential to be applied in antibacterial applications
PHASE AND FUNCTIONAL GROUPS ANALYSIS OF ZNO NANOCRYSTALLINE SYNTHESIZED FROM CITRUS ORANGE PEEL Ma’arif, M. Samsul; Alfina, Fitria Tahta; Pratiwi, Devi Ragita Putri; Rohmawati, Lydia
Indonesian Physical Review Vol. 7 No. 3 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i3.338

Abstract

The high production and market demand for citrus fruits can increase environmental waste. Most people do not use orange peel waste even though this peel contains bioactive compounds and phytochemicals that have the potential to form ZnO using the green synthesis method. This new research offers an environmentally friendly solution to reducing orange peel waste using abundant natural resources for nanotechnology applications. Therefore, this research aims to identify the phase of ZnO material and functional groups from orange peel extract. The extraction method of ZnO from Citrus sinensis orange peel uses green synthesis. The analysis in this research indicates that the sample has the phase of a zincite crystalline and a nanocrystalline size of 12.98 nm. The sample has an absorption peak at a wave number of 4000 – 400 cm-1 with functional groups indicating OH, C=C, Zn-OH, and Zn-O stretching vibration
Co-Authors Adiono, Muchammad Adiyanto, Afandi Putra alfan, mohamad wafiq nafii alfan Alfina, Fitria Tahta Alhamidy, Muh. Hakim Amanati, Anis Yulia Arief, Alimufia Diah Hari Kusumawati DIAN SAVITRI Dina Kartika Maharani Diningsih, Candra Ella, Isbatus Sabillah Fathoni, Silviana Nurul Ferdianto, Sandy Prayoga Fidiyanti, Yuvita Nur Fitriana Fitriana Hefdea, Ajeng Imam Sucahyo Isna Rahmawati, Isna istiqomah istiqomah Krisdiana, Anita Kurniasari, Laily Yosie Lailia, Lytha Rizqika Lala, Lailatus Syafa'ah Ma’arif, M. Samsul Millenia, Salsabila Happy Mita Anggaryani Mufida, Nur MUNASIR Muyasaroh, Anisa Fitri NUGRAHANI PRIMARY PUTRI Nugrahani Primary Putri Oktavia, Anggraini Dwi Pratiwi Pratiwi, Devi Ragita Putri Puji Rahayu Rachmawati, Tsaniyah Nabilah Rahayu, Nella Puji Rahmawati, Diah Ayu Rizky Firmansyah Santika, Rosalia Sholikah, Ria Inus Styarsih, Woro Suaebah, Evi Syafaah, Lailatus Utama Alan Deta Veronika, Angelina O Woro Setyarsih Wulancahayani, Entang