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All Journal PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman JURNAL ATOMIK Jurnal Abdimas Mahakam
Noor Hindryawati
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Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Energy Environmental Science Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

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Journal : PROSIDING SEMINAR KIMIA

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PEMBUATAN KOMPOSIT Zn-Fe3O4/WO3 DAN APLIKASINYA DALAM PROSES FOTOKATALISIS Ainun Rahmi Ramadhannur; Teguh Wirawan; Noor Hindryawati
PROSIDING SEMINAR KIMIA 2021: SEMINAR NASIONAL KIMIA 2021
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Di dalam makalah ini, di lakukan proses fotokatalisis dengan menggunakan komposit Zn-Fe3O4/WO3 . Material komposit Zn-Fe3O4/WO3 di siapkan dan di karakterisasi menggunakan alat-alat instrumentasi dan aplikasinya untuk mendegradasi fenol secara fotokatalitik telah dilakukan. Tujuan penelitian dilakukan dengan mengamati degradasi larutan metilen biru sebagai model polutan organik di bawah penynaran UV-Vis. Tahapan penelitian ini yaitu yang pertama, pembuatan Fe3O4 dengan metode kopresipitasi, yang kedua pembuatan ZnO dengan metode kopresipitasi dan yang terakhir pembuatan Zn-Fe3O4/WO3 melalui reaksi padat-padat kemudian dikarakterisasi menggunakan X-ray Diffraction (XRD) dan Scanning Electron Microscope (SEM) serta dilanjutkan dengan proses degradasi metilen biru lalu di karakterisasi dengan Spektrofotometri UV-Vis. Hasil karakterisasi XRD menunjukkan adanya struktur komposit Zn-Fe3O4/WO3. Pada analisa SEM dapat diamati pada Zn-Fe3O4/WO3 terdapat ukuran partikel yang tidak seragam dan cenderung menggumpul serta menempel satu sama lain. Hasil optimasi pada degradasi methylene blue berdasarkan variasi jenis katalis yang digunakan menunjukkan bahwa Zn-Fe3O4/WO3 memiliki aktivitas yang lebih baik dibandingkan Fe3O4, ZnO dan WO3. Lalu pada variasi sumber sinar menunjukkan sinar UV-Vis menghasilkan nilai % degradasi lebih baik. Kata Kunci: Komposit Zn-Fe3O4/WO3, Methylene Blue, Fotokatalitik, Degradasi.
PEMBUATAN KATALIS BASA HETEROGEN DARI BATU GAMPING (LIMESTONE) GUNUNG PUGER Rakhmad Rakhmad; Noor Hindryawati; Daniel Daniel
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2017
Publisher : PROSIDING SEMINAR KIMIA

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Telah dilakukan penelitian tentang pembuatan katalis basa heterogen dari batu gamping (limestone). Serbuk batu gamping yang telah dipreparasi, dikalsinasi menggunakan furnace selama 6 jam pada suhu 900 °C. Penentuan kadar kalsium pada serbuk batu gamping menggunakan XRFdan karakterisasi menggunakan XRD dan SEM. Hasil karakterisasi XRD batu gamping sebelum kalsinasi menunjukkan puncak yang muncul pada 2θ = 29,4049°, 31.4176°, 39,4009°, 43.1447°, 47,4886°, 48,5122°, 57.4001°, 58.0733° dan 60.9857° menunjukkan bahwa mineral yang terkandung dalam sampel batu gamping berupa CaCO3 termasuk jenis calcite dengan system kristal rhombohedral. Mineral calcite batu gamping ini dapat dikalsinasi dengan nilai kristalinitas 99,6978 %dan setelah dikalsinasi pada suhu 900 °C selama 6 jam. Serbuk batu gamping yang telah dikalsinasi berjenis portlandite berupa Ca(OH)2 yang muncul pada puncak 18.0073°, 28.6709°, 34.1013°, 47.1200°, 50.8120°, 54.3565°, 62.6319° dan 64.2314°. Serbuk batu gamping yang telah dikalsinasi memiliki nilai kristalinitas sebesar 96,4945 %. Hasil karakterisasi SEM pada batu gamping sebelum dikalsinasi memiliki ukuran partikel bervariasi, terdapat ukuran bervariasi yang tidak merata yang menumpuk berwarna putih yang cenderung lebih kecil yang menyebabkan nilai kristalinitasnya tinggi sebagai mineral calcite. Citra uji SEM batu gamping setelah dikalsinasi pada suhu 900 °C selama 6 jam terjadi perubahan ukuran partikel yang membesar dan lebih seragam. Hal ini ditunjukkan oleh partikel berwarna putih. Uji kebasaan katalis dengan metode Hammett indicator pada indikator pp rentang kebasaan katalis pada rentang 8,6<H_<15 dan uji dengan metode benzoic acid titration menunjukkan nilai kebasaan katalis CaO dari batu gamping sebesar 1,7372 mmol/gr. Kata kunci: Batu gamping, katalis basa heterogen, CaCO3, calcite, portlandite
SINTESIS KOMPOSIT TiO2/WO3/SiO2 MENGGUNAKAN ABU SEKAM PADI SEBAGAI SUMBER SILIKA Abdul Zakaria; Noor Hindryawati; R.R Dirgarini Julia N
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2019
Publisher : PROSIDING SEMINAR KIMIA

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Telah dilakukan penelitian tentang sintesis komposit TiO2/WO3/SiO2 dengan abu sekam padi sebagai sumber silika. Sintesis dilakukan dengan metode sol-gel-hidrotermal dengan perbandingan mol TiO2:WO3 1:0,5. Karakterisasi komposit dilakukan menggunakan X-Ray Diffraction (XRD), SEM-EDX dan Surface Area Analyzer. Hasil XRD menunjukkan terdapat SiO2 quartz dan cristobalite, TiO2 rutile dan WO3 monoklinik. Analisa SEM menunjukkan komposit memiliki morfologi permukaan yang tidak seragam. Hasil EDX menunjukkan terdapat atom Ti, W, Si dan O yang menandakan adanya TiO2, WO3 dan SiO2 . Hasil analisa Surface Area Analyzer menunjukkan luas permukaan komposit sebesar 8,80 m2/g. Kata Kunci : Komposit, Sol-gel-hidrotermal, TiO2/WO3/SiO2.
PEMBUATAN DAN KARAKTERISASI SULFONAT TERIMPREGNASI PADA SILIKA DARI ABU SEKAM PADI (RICE HUSK ASH) Nirwanto Pasuluran; Erwin Erwin; Noor Hindryawati
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2017
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Preparation of sulfonate silica as acid catalyshas been done with rice husk ash material using impregnation method. The process of making the catalyst was conducted on the extraction and impregnation. The results of the study were characterized using FT-IR spectrophotometer and SEM. Based on the FT-IR resultsthere is vibration from the group S=O at a wavelength of 1069.73 cm-1 is and pores on the surface of the silica filled by molecules of –SO3H Keywords: Silica,Rice Husk Ash, Impregnation
ANALISIS KADAR LOGAM Pb, Mn DAN KANDUNGAN PROTEIN PADA DAGING UDANG WINDU (Penaeus sp.) YANG DIAMBIL DI PERAIRAN SUNGAI DONDANG KECAMATAN MUARA JAWA Riyan Octavianus; Rudi Kartika; Noor Hindryawati
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2017
Publisher : PROSIDING SEMINAR KIMIA

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Research on metal concentration of Pb, Mn and protein content in windu shrimp’ meat (penaeus sp.) analysis in Dondang river, kecamatan Muara Jawa have done. This research is aimed to determine the concentration of heavy metal Pb, Mn and concentration of protein inside windu shrimp based by size and different sampling location. Concentration of heavy metal Pb, Mn and protein are correlated using Least Square method. Concentration of heavy metal Pb and Mn are analyzed by using AAS (Atomic Absorption Spectrophotometry) and concentration of protein are analyzed by using Kjeldahl method. Result of this research is the concentration heavy metal Pb and Mn in sampling point 1 in average concentration are 0.556 mg/L and 0.463 mg/L, sampling point 2 are 0.790 mg/L and 0.738 mg/L, sampling point 3 are 0.876 mg/L and 0.905 mg/L. Concentration of protein in windu shrimp in sampling point 1 in average are 23.4928%, sampling point 2 are 28.1701% and sampling point 3 are 29.1622%. Correlation of concentration of heavy metal Pb and Mn to the concentration of protein in windu shrimp (penaeus sp.) with R = 0.791; r = 0.948. Keywords: heavy metal Pb, heavy metal Mn, protein, windu shrimp (penaeus sp).
MINI-REVIEW: PEMBUATAN DYE-SENSITIZED SOLAR CELLS (DSSC) MENGGUNAKAN SEMIKONDUKTOR TIO2 DENGAN BANTUAN ZAT PEWARNA ALAMI Muhammad Irvan Mulya Pratama; Veliyana London Allo; Noor Hindryawati
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The availability of energy sources such as coal and oil is getting thinner every year. Sunlight is one of the most abundant sources of energy on earth. Solar cells can convert this energy into electricity and over time, dye-Sensitized solar cells (DSSC) have the potential to be developed because they have good efficiency. However, the use of synthetic dyes is difficult to obtain and is toxic because it contains heavy metals. Therefore, natural dyes are used as alternative materials in the fabrication of DSSC. The purpose of this article is to review the results of research on DSSC using natural dyes. The method used in this research is the literature review method. The results of the literature review show that the DSSC made with TiO2 semiconductor and natural dyes has a good efficiency of about 0,592 %. Natural dyes can be obtained by extracting plants containing anthocyanins, curcumin and chlorophyll such as red cabbage, turmeric and pandan leaves, what's interesting is that using 2 different types of natural dyes will produce higher efficiency than 1 type of dye. In addition, treatment factors such as dye extraction, the amount of TiO2 used and the length of immersion into the dye also affect the efficiency of the DSSC. Keywords: DSSC, natural dyes and efficiency
MINI REVIEW: PEMBUATAN DYE SENSITIZED SOLAR CELL (DSSC) MENGGUNAKAN SEMIKONDUKTOR TIO2 DENGAN ZAT WARNA ANTOSIANIN Ziyyanatul Luthfiyyah; Noor Hindryawati; Irfan Ashari Hiyahara
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Dye Sensitized Solar Cell (DSSC) is a tool or device that can convert light energy into electrical energy. Dye Sensitized Solar Cell (DSSC) is a solar cell consisting of a pair of glass electrodes, namely the working electrode and the counter electrode flanking the electrolyte. The working electrode is composed of TCO (Transparent Conducting Oxide) glass which is then coated with TiO2 and a dye containing anthocyanins as a charge carrier photosensitizer. The counter electrode is composed of TCO glass coated with carbon which is used as a catalyst to accelerate the redox reaction with the electrolyte. Anthocyanins can absorb photon energy at a distance of about 520-550 nm. Dye will excitate due to absorption of photon energy. The more dye attached, it will produce more photoelectrons where the size of the TiO2 semiconductor affects the dye attached or attached during the coloring process. Natural anthocyanins can be obtained from plant materials such as the crown of the gods, dragon fruit, red cabbage, purple sweet potato and buni fruit. Natural dye is an alternative that is non-toxic, renewable and easily degraded so that it is friendly to the environment. The results of the efficiency of the DSSC using natural anthocyanins showed good results, namely 0.38%. so it can be concluded that anthocyanins from natural dyes can be used in the manufacture of DSSC. Keywords: Dye Sensitized Solar Cell, Anthocyanins, TiO2 Semiconductor, Natural dye
GREEN SYNTHESIS NANOPARTIKEL PERAK DENGAN BANTUAN GELOMBANG ULTRASONIK: MINI REVIEW Atika Aulia Ahmad; Noor Hindryawati; Irfan Ashari Hiyahara
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Silver nanoparticles are particles composed of silver oxide with a size of 1-100 nm that can be made by the bottom-up method through the reduction of Ag+ ions with the addition of a bioreductors and ultrasonic waves. Green Synthesis is currently very popular in the fields of science, technology and industry because it is more environmentally friendly. The use of ultrasonic waves in this synthesis can help to time-efficient and increase the reaction rate. Thus, the purpose of this review is to determine the characteristics of nanoparticles synthesized using ultrasonic waves based on UV-Vis and TEM spectroscopic data. The results of the literature show that the factors that affect the stability of the nanoparticles include the molar concentration of AgNO3, the volume of the extract, the stabilizing agent and the reaction time. The change of Ag+ to Ag0 was shown qualitatively by changing the color of the solution from clear/light yellow to brown. Wavelength values of typical nanoparticles appear at 420-440 nm. In the presence of ultrasonic waves it can produce AgNPs sizes between 8 - 33.8 nm and spherical and uniform nanoparticle shapes
Co-Authors Abdul Zakaria Ainun Rahmi Ramadhannur Allo, Veliyana Londong Aman Sentosa Panggabean Annuary Laksono Arif Dwiki Saputra Atika Aulia Ahmad Daniel Daniel Dian Eka Chandra Djihan Ryn Pratiwi Edman Tandirerung Erwin Erwin Eva Marliana, Eva Helbianurramdan Helbianurramdan Helbyarti Mawar Sari Hendra Priatna Ika Yekti Liana Sari irfa Ashari Hyahara Irfan Ashari Hiyahara Joni Rahman Muhammad Irvan Mulya Pratama Nauval Dwi Fadillah Nirwanto Pasuluran R.R Dirgarini Julia N R.R Dirgarini Julia Nurlianti Subagyono R.R. Dirgarini Julia N. R.R. Dirgarini N. Rakhmad Rakhmad Renita Anggun Winanti Rinda Anisyah Putri Ritbey Ruga Riyan Octavianus RR Dirgarini Julia Nurlianti Subagyono RR. Dirgarini Julia N. S. Rudi Kartika, Rudi Soerja Koesnarpadi Survina Osalia Br Ginting Teguh Wirawan Widya Rachmah Sari Yusniar Yusniar Ziyyanatul Luthfiyyah