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Performance of Polyaniline Film as a CH3COOH Gas Sensing Functional Material: Kata Kunci: PANi, elektrodeposisi, ITO, recovery time, response time, sensitivitas, gas asam Pratiwi, Irin Fagianti Rias; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 12 No. 3 (2023): Vol 12 No 3
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

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Dalam proses industri dan laboratorium banyak menggunakan bahan kimia asam, salah satunya asam lemah CH3COOH. Gas CH3COOH cukup membahayakan kesehatan manusia apabila terpapar secara terus menerus. Oleh karena itu perlu ditanggulangi dengan membuat sensor gas asam. Penelitian ini bertujuan untuk menganalisis performa sensor berbahan polianilin (PANi) pada gas CH3COOH. PANi disintesis menggunakan metode elektrodeposisi pada permukaan substrat ITO dengan menggunakan scan rate sebesar 100 mV/s dan siklus sebanyak 10. Proses penginderaan gas CH3COOH dilakukan menggunakan Four Point Probe (FPP) dan didapatkan hasil recovery time, response time, dan sensitivitas yang cenderung meningkat seiring peningkatan konsentrasi gas analit yang dipaparkan. Pada penginderaan CH3COOH terendah (1 ppm) didapatkan response time sebesar 29.7 s, recovery time sebesar 21.9 s, dan sensitivitas sebesar 5.11 %. Pada penginderaan CH3COOH tertinggi (10 ppm) didapatkan response time sebesar 50.3 s, recovery time sebesar 39.7 s, dan sensitivitas sebesar 13.64 %. Dari proses sintesis yang cepat dan hasil penginderaan yang cukup bagus, maka lapisan tipis PANi baik digunakan sebagai bahan fungsional penginderaan gas CH3COOH. Kata Kunci: PANi, elektrodeposisi, ITO, recovery time, response time, sensitivitas, gas asam Abstract In industrial and laboratory processes, many acidic chemicals are used, one of which is the weak CH3COOH vapor. CH3COOH gas is quite harmful to human health if exposed continuously. Therefore it needs to be overcome by making acid gas sensors. This study aims to analyze the performance of sensors made from polyaniline (PANi) in CH3COOH gas. PANi was synthesized using the electrodeposition method on the surface of ITO substrates using a scan rate of 100 mV/s and 10 cycles. The CH3COOH gas sensing process was carried out using a Four Point Probe (FPP) and the results obtained were recovery time, response time, and sensitivity which tended to increase with increase in the gas concentration of the analytes exposed. At the lowest CH3COOH sensing (1 ppm) obtained a response time of 29.7 s, a recovery time of 21.9 s, and a sensitivity of 5.11%. The highest CH3COOH sensing (10 ppm) obtained a response time of 50.3 s, a recovery time of 39.7 s, and a sensitivity of 13.64%. From the fast synthesis process and good sensing results, PANi thin films are good for use as CH3COOH gas sensing functional materials. Keywords: PANi, electrodeposition, ITO, recovery time, response time, sensitivity, acid gas

PENGARUH VARIASI DAYA DAN LAMA PAPARAN IRRADIASI LASER DIODE TERHADAP PEFORMA PERTUMBUHAN CASSAVA: Kata Kunci: Cassava, Fotobiostimulasi, Laser Dioda, Manihot Esculenta Prasetyo, Dhenatra Rifqy; Putri, Nugrahani Primary; Firdaus, Rohim Aminullah; Ula, Rini Khamimatul
Inovasi Fisika Indonesia Vol. 13 No. 1 (2024): Vol 13 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n1.p1-6

Irradiasi laser adalah teknologi yang inovatif dan dapat diterapkan dalam bidang bioteknologi. Dengan menggunakan sinar laser yang terfokus, intens dan pada paparan waktu tertentu, teknologi ini memungkinkan dapat menstimulasi perkembangan dan pertumbuhan dari tanaman. Penelitian ini bertujuan untuk menganalisis hasil dan mendeskripsikan hasil dari pengaruh irradiasi laser terhadap pertumbuhan. Irradiasi laser diberikan kepada sampel dengan variasi daya 1mW, 4mW, 6mW, dan 10mW, serta lama waktu paparan 30s, 40s, 50s, 60s, 70s, 80s, dan 90s. Hasil peforma pertumbuhan Cassava pada sampel D1T70 menunjukkan hasil yang cukup signifikan dibandingkan dengan kontrol yang ada, dengan menunjukkan tinggi batang akhir 65mm pada periode tanam selama 1 bulan. Kata Kunci: Cassava, Fotobiostimulasi, Laser Dioda, Manihot Esculenta Abstract Laser irradiation is an innovative technology and can be applied in the field of biotechnology. By using laser beams that are focused, intense and at a certain time exposure, this technology makes it possible to stimulate the development and growth of plants. This study aims to analyze the results and describe the results of the effect of laser irradiation on growth. Laser irradiation was given to samples with various power of 1mW, 4mW, 6mW, and 10mW, and exposure times of 30s, 40s, 50s, 60s, 70s, 80s, and 90s. The results of Cassava growth performance in the D1T70 sample showed significant results compared to the existing control, showing a final stem height of 65mm in a planting period of 1 month. Keywords: Cassava, Photobiostimulation, Laser Diode, Manihot Esculenta

KARAKTERISTIK LAPISAN TIPIS POLIANILIN SEBAGAI BAHAN AKTIF SENSOR GAS BENZENE: Kata Kunci: Polianilin, Benzene, Sensitivitas Ariyanti, Pramesti Regita; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 13 No. 1 (2024): Vol 13 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n1.p21-26

Polianilin (PANi) adalah salah satu jenis polimer konduktif yang dapat disintesis dengan menggunakan metode elektrodeposisi pada subtrat ITO. Penelitian ini bertujuan untuk menganalisis dan mendeskripsikan performa penginderaan PANi terhadap gas Benzene. Lapisan tipis PANi terbentuk pada permukaan substrat ITO dengan menggunakan scan rate sebesar 100 mV/s dan siklus sebanyak 10. Hasil uji spektroskopi PANi sebelum dan sesudah terpapar gas Benzene tidak menunjukkan perbedaan dan masih dalam range gugus fungsi PANi. Untuk mengetahui performa penginderaan lapisan PANi terhadap gas analit dilakukan uji resistansi menggunakan Four Point Probe (FPP) dan didapatkan hasil sensitivitas, recovery time, dan response time, yang cenderung meningkat seiring peningkatan konsentrasi gas Benzene yang dipaparkan. Pada penginderaan Benzene dengan konsentrasi rendah (2 ppm) didapatkan response time sebesar 34.18 S, recovery time sebesar 30.56 s, dan sensitivitas sebesar 6,48%. Pada penginderaan Benzene dengan konsentrasi tinggi (20 ppm) didapatkan response time sebesar 63.04 s, recovery time sebesar 54.39 s, dan sensitivitas sebesar 11,73 %. Sehingga, lapisan PANi layak digunakan sebagai bahan fungsional sensor gas Benzene Kata Kunci: Polianilin, Benzene, Sensitivitas Abstract Polyaniline (PANi) is one type of conductive polymer that can be synthesized using the electrodeposition method on an ITO substrate. This study aims to analyze and describe the results of the sensitivity, reusability, response time, and recovery time of PANi to Benzene gas. Thin PANi films are formed on the surface of the ITO substrate using a scan rate of 100 mV/s and 10 cycles. The spectroscopic analysis of PANi before and after exposure to Benzene gas shows no significant difference and remains within the range of PANi functional groups. To assess the sensing performance of the PANi film towards the analyte gas, resistance tests are conducted using a Four Point Probe (FPP), yielding sensitivity, recovery time, and response time results that tend to increase with the increasing concentration of exposed Benzene gas. For the detection of low concentration Benzene (2 ppm), the response time is 34.18 s, the recovery time is 30.56 s, and the sensitivity is 6.48%. For the detection of high concentration Benzene (20 ppm), the response time is 63.04 s, the recovery time is 54.39 s, and the sensitivity is 11.73%. Therefore, the PANi film is suitable for use as a functional material for Benzene gas sensing. Keywords: Polyaniline, Benzene, Sensitivity

SINTESIS DAN KARAKTERISASI PANI/Fe3O4 MENGGUNAKAN Fe3O4 DARI PASIR BESI GUNUNG GALUNGGUNG JAWA BARAT: Kata Kunci: PANI/Fe3O4, Band gap, Semikonduktor Rahmawati, Ema; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 13 No. 2 (2024): Vol 13 No 2
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n2.p45-50

Abstrak Pasir besi dari letusan gunung berapi memiliki kandungan magnetik Fe3O4 yang tinggi sehingga memiliki nilai ekonomi yang baik dan dapat dimanfaatkan sebagai penyerap gelombang, bahan elektroda dan lain sebagainya. Akan tetapi Fe3O4 memiliki sifat listrik yang kurang baik, sehingga perlu diberi tambahan bahan polimer yang dapat memperbaiki sifat listriknya. Bahan polimer tersebut salah satunya adalah polianilin (PANI). Polianilin merupakan bahan polimer yang memiliki sifat fisik dan kimia yang unik, terutama sifat listriknya. Tujuan dari penelitian ini untuk mengetahui struktur kristal, ukuran kristal dan energi band gap dari PANI/Fe3O4. Penelitian ini dilakukan dengan tujuan menganalisis sifat listrik PANI/ Fe3O4. Pembuatan PANI/Fe3O4 dilakukan menggunakan metode polimerisasi in-situ. Untuk mengetahui fasa struktur kristal dan ukuran kristal dilakukan karakterisasi menggunakan XRD. Sedangkan untuk mengetahui sifat listrik PANI/Fe3O4 dilakukan karakterisasi dengan spektrofotometer Uv-Vis. Hasil karakterisasi menunjukkan bahwa Fe3O4 memiliki struktur kristal terbentuk kubik dengan rata-rata ukuran kristal 15.40 nm, selain itu didapatkan nilai bandgap PANI sebesar 2.9 eV dan PANI/Fe3O4 sebesar 2.56 eV. Berdasarkan hasil penelitian dapat diketahui bahwa PANI/Fe3O4 merupakan bahan semikonduktor karena berada pada rentang 0.3-4 eV. Kata Kunci: PANI/Fe3O4, Band gap, Semikonduktor Abstract Iron sand from volcanic eruptions has a high magnetic content of Fe3O4 so that it has good economic value and can be used as a wave absorber, electrode material and so on. However, Fe3O4 has poor electrical properties, so it needs to be given additional polymeric materials that can improve its electrical properties. One of these polymeric materials is polyaniline (PANI). Polyaniline is a polymer material that has unique physical and chemical properties, especially its electrical properties. The purpose of this research is to determine the crystal structure, crystal size and band gap energy of PANI/Fe3O4. This research was conducted with the aim of analyzing the electrical properties of PANI/Fe3O4. PANI/Fe3O4 was prepared using in-situ polymerization method. To determine the phase of crystal structure and crystal size, characterization was done using XRD. Meanwhile, the electrical properties of PANI/Fe3O4 were characterized by Uv-Vis spectrophotometer. The characterization results show that Fe3O4 has a cubic crystal structure with an average crystal size of 15.40 nm, in addition to the PANI bandgap value of 2.9 eV and PANI/Fe3O4 of 2.56 eV. Based on the results, it can be seen that PANI/Fe3O4 is a semiconductor material because it is in the range of 0.3-4 eV. Keywords: PANI/Fe3O4, Band gap, Semiconductor

PENGARUH VARIASI PENAMBAHAN MASSA PANI TERHADAP KONDUKTIVITAS NANOFIBER PVA/PANI: Kata Kunci: PVA, PANI, Massa, Konduktivitas Islami, Diva Nuri Diva; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 13 No. 3 (2024): Vol 13 No 3
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n3.p1-6

Abstrak Polianilin adalah salah satu polimer konduktif yang memiliki konduktivitas relatif tinggi dan banyak dikembangkan karena tahapan sintesisnya yang mudah. PANI dapat dibentuk menjadi nanofiber karena lebih efektif jika dibandingkan dengan film tipis dan membran. Nanofiber memiliki luas permukaan dan memiliki konduktivitas listrik dan termal yang lebih tinggi. Sebelum terbentuk nanofiber, dilakukan variasi penambahan massa PANI pada larutan PVA. Sesuai pada uji FTIR menunjukkan bahwa gugus fungsi PVA dan PANi yang didapatkan telah sesuai dengan referensi. Nilai konduktivitas listrik nanofiber PVA/PANI diidentifikasi menggunakan four point probe (FPP), dan didapatkan hasil terbaik adalah pada saat variasi penambahan massa PANI sebesar 1.3 g dengan nilai sebesar 4.82 x 10-3S/cm. Dimana, semakin besar variasi penambahan massa PANI mengakibatkan semakin besar nilai konduktivitas nanofiber PVA/PANI. Kata Kunci: PVA, PANI, Massa, Konduktivitas Abstract Polyaniline is one of the conductive polymers that has relatively high conductivity and is widely developed due to its easy synthesis stages. PANI can be formed into nanofibers because it is more effective when compared to thin films and membranes. Nanofiber has higher surface area and electrical and thermal conductivity. Before the formation of nanofiber, the variation of PANI mass addition to PVA solution was carried out. FTIR test shows that the functional groups of PVA and PANi obtained are in accordance with the reference. The electrical conductivity value of PVA/PANI nanofiber was identified using four point probe (FPP), and the best result was obtained when the variation of PANI mass addition of 1.3 g with a value of 4.82 x 10-3S/cm. Where, the greater the variation of PANI mass addition, the greater the conductivity value of PVA/PANI nanofiber. Keywords: PVA, PANI, Mass, Conductivity

KARAKTERISTIK GRAPHENE OXIDE (GO) DARI BAHAN PURUN TIKUS (ELEOCHARIS DULCIS): Kata Kunci: graphene oxide (GO), ultrasonifikasi, konduktivitas listrik. Putri, Fraya Anggraini; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 13 No. 3 (2024): Vol 13 No 3
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v13n3.p89-94

Batik Jumputan goes to Taiwan: Utilizing natural dyes to preserve local wisdom Putri, Nugrahani Primary; Munasir, Munasir; Kusumawati, Diah Hari; Suaebah, Evi
Journal of Dedication in Community Vol. 2 No. 2 (2024)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jodic.v2n2.p8-16

This community service aims to introduce the local wisdom of Indonesia, especially typical Indonesian plants that can be used as natural dyes. The object of this activity is Indonesian students who study and live in Taiwan. In addition to introducing local wisdom, the community service team also intends to increase interest in learning science through training in making natural dyes. From the preparations that have been made, the team has succeeded in making natural dyes of yellow, red, and green. It has succeeded in making a video tutorial on making batik Jumputan with natural dyes. The batik Jumputan material was brought as training material on July 5, 2024, at NCU, Taoyuan, Taiwan, with participants from PPI Taiwan members and native Taiwanese students. The training participants were enthusiastic about the activities carried out, as evidenced by the positive response to this activity.

ANALISIS PENGARUH PART PER MILLION (PPM) SUCOLITE TERHADAP KEKERUHAN PENGOLAHAN AIR BAKU (SUNGAI) PDAM: Kata Kunci: Air, Standarisasi, Sucolite. Rahmawati, Ema; Putri, Fraya Anggraini; Rahmawati, Diah Ayu; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 14 No. 1 (2025): Vol 14 No 1
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n1.p103-107

Air merupakan salah satu sumber daya alam yang memiliki peranan penting dalam kehidupan. Makhluk hidup membutuhkan air bersih untuk memenuhi kebutuhannya. Jumlah kebutuhan air bersih semakin meningkat seiring bertambahnya jumlah penduduk. Air bersih untuk dikonsumsi haruslah dikelola berdasarkan standarisasi air minum, sehingga dilakukan pengawasan dan surveilans kualitas air. PDAM PT. Hanarida Tirta Birawa mengacu standarisasi Baku Mutu Air Minum V Golongan II. Bahan baku air yang akan dikelola tersebut berasal dari air sungai pelayaran dengan kualitas air yang berubah-ubah dan tidak selalu bagus. Sehingga perlu untuk memperoleh kualitas air yang baik, PT. Hanarida Tirta Birawa melakukan pengujian jartest guna menentukan takaran penggunaan bahan kimia sucolite atau sucolite terpilih agar dapat menghasilkan air minum sesuai dengan standarisasinya. Kata Kunci: Air, Standarisasi, Sucolite. Abstract Water is one of the natural resources that has an important role in life. Living things need clean water to fulfill their needs. The amount of clean water demand is increasing as the population increases. Clean water for consumption must be managed based on drinking water standards, so water quality monitoring and surveillance is carried out. PDAM PT Hanarida Tirta Birawa refers to the standardization of Drinking Water Quality Standard V Group II. The raw water that will be managed comes from the shipping river with water quality that changes and is not always good. So, it is necessary to obtain good water quality, PT Hanarida Tirta Birawa conducts jar test testing to determine the dose of sucolite or selected sucolite chemicals to produce drinking water in accordance with its standardization. Keywords: Water, Standardization, Sucolite.

ANALISIS RESPON LAPISAN TIPIS POLIANILIN TERHADAP AROMA KUNYIT Rahayu, Erfina Nur; Putri, Nugrahani Primary; Suaebah, Evi
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p163-170

AbstrakPenelitian ini telah berhasil mengeksplorasi potensi polianilin (PANI) sebagai material sensor, khususnya untuk aplikasi sensor aroma. PANI disentesis menggunakan metode elektrodeposisi untuk menghasilkan lapisan tipis yang terdeposisi pada permukaan kaca konduktif ITO. Lapisan tipis PANI kemudian dikarakterisasi untuk mengetahui performanya dalam mendeteksi aroma kunyit melalui perubahan nilai resistansi ketika berinteraksi dengan aroma kunyit. Data resistansi yang diperoleh dianalisis untuk menentukan sensitivitas, repeatabilitas, waktu respon, dan waktu pemulihan sensor. Untuk volume essential oil kunyit yang digunakan dalam pengujian adalah 0,5 ml. Hasil pengujian menunjukkan bahwa nilai sensitivitas PANI dalam mendeteksi aroma kunyit yaitu sebesar 7,64%. PANI juga menunjukkan repeatabilitas yang baik dalam mendeteksi aroma kunyit, karena nilai resistansi bisa kembali ke titik resistansi awal, selain itu dihasilkan waktu respon sebesar 152 s dan waktu pemulihan 130 s. Berdasarkan hasil penelitian dapat disimpulkan bahwa PANI menujukkan performa yang baik dalam mendeteksi aroma kunyit sehingga berpotensi untuk dikembangkan sebagai material sensor fungsional. AbstractThis study successfully explored the potential of polyaniline (PANI) as a sensor material, particularly for aroma sensor applications. PANI was synthesized using the electrodeposition method to produce a thin film deposited on the surface of conductive ITO glass. The PANI thin film was then characterized to evaluate its performance in detecting turmeric aroma through changes in resistance upon interaction with the aroma. The obtained resistance data were analyzed to determine the sensor's sensitivity, repeatability, response time, and recovery time. The volume of turmeric essential oil used in the test was 0.5 mL. The results showed that the sensitivity of PANI in detecting turmeric aroma was 7,64%. PANI also demonstrated good repeatability in detecting the aroma, as the resistance values were able to return to their initial point. In addition, a response time of 152 seconds and a recovery time of 130 seconds were obtained. Based on these findings, it can be concluded that PANI exhibits good performance in detecting turmeric aroma and has strong potential to be developed as a functional sensor material.

UNJUK KERJA KOMPOSIT TIO₂/PANI UNTUK DEGRADASI PEWARNA METHYLENE BLUE Amalia, Dilla; Putri, Nugrahani Primary
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p234-242

Abstrak Pencemaran air akibat limbah industri, khususnya dari zat pewarna sintetis seperti methylene blue, merupakan masalah lingkungan signifikan yang memerlukan solusi efektif dan berkelanjutan. Fotokatalisis berbasis semikonduktor telah banyak dikembangkan sebagai metode efisien untuk degradasi polutan. Penelitian ini mengkaji sintesis nanopartikel titanium dioksida (TiO₂) dan pembentukan komposit TiO₂/polianilin (PANI) melalui metode polimerisasi in situ. Rancangan penelitian mencakup proses sintesis, karakterisasi struktur dan gugus fungsi menggunakan XRD, FTIR, dan spektrofotometri UV-Vis, serta pengujian aktivitas fotokatalitik terhadap degradasi methylene blue. Hasil menunjukkan bahwa komposit TiO₂/PANI memiliki fasa anatase dominan berdasarkan analisis XRD, serta keberadaan gugus fungsi khas PANI dan interaksinya dengan TiO₂ yang terkonfirmasi melalui spektrum FTIR. Uji fotokatalitik memperlihatkan efisiensi degradasi larutan methylene blue mencapai 98,94% pada 60 menit penyinaran UV dan meningkat hingga 99,69% setelah 180 menit, menandakan aktivitas fotokatalitik yang cepat dan hampir mencapai kondisi optimum. Temuan ini mengindikasikan potensi tinggi komposit TiO₂/PANI sebagai fotokatalis efektif untuk pengolahan limbah zat pewarna secara efisien dan berkelanjutan. Abstract Water pollution caused by industrial waste, particularly from synthetic dyes such as methylene blue, is a significant environmental issue that requires effective and sustainable solutions. Semiconductor-based photocatalysis has been extensively developed as an efficient method for pollutant degradation. This study investigates the synthesis of titanium dioxide (TiO₂) nanoparticles and the formation of TiO₂/polyaniline (PANI) composites via in situ polymerization. The research design includes synthesis processes, structural and functional group characterization using XRD, FTIR, and UV-Vis spectrophotometry, as well as photocatalytic activity testing for methylene blue degradation. Results indicate that the TiO₂/PANI composite predominantly exhibits the anatase phase as confirmed by XRD analysis, along with characteristic PANI functional groups and their interaction with TiO₂ verified by FTIR spectra. Photocatalytic tests demonstrated a degradation efficiency of 98.94% after 60 minutes of UV irradiation, which further increased to 99.69% after 180 minutes, indicating rapid photocatalytic activity approaching an optimal condition. These findings suggest that the TiO₂/PANI composite holds great potential as an effective photocatalyst for the efficient and sustainable treatment of dye-containing wastewater.

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