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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Kimia Universitas Brawijaya Physics Student Journal Natural B The Journal of Pure and Applied Chemistry Research JURNAL INTEGRASI PROSES Jurnal Kimia dan Kemasan Chimica et Natura Acta Molekul: Jurnal Ilmiah Kimia JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Fullerene Journal of Chemistry Acta Chimica Asiana Jurnal Kimia dan Kemasan ARRUS Journal of Engineering and Technology Makara Journal of Science Indonesian Journal of Fundamental Sciences Indonesian Mining Journal

Rachmat Triandi Tjahjanto

Chemistry Department, Faculty Of Mathematics And Natural Sciences, University Of Brawijaya, Jl. Veteran 65145 Malang, Indonesia

Author-ID : 404074

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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STUDI PENGARUH PENAMBAHAN TIMAH HITAM TERHADAP STRUKTUR KRISTAL LAPISAN TIPIS PZT DI DAERAH MORPHOTROPIC PHASE BOUNDARY (MPB) Titus Lapailaka; Rachmat Triandi Tjahjanto; Masruroh Masruroh
Chimica et Natura Acta Vol 2, No 1 (2014)
Publisher : Departemen Kimia

Telah dilakukan sintesis dan penumbuhan lapisan tipis PZT di daerah morphotropic phase boundary (MPB) dengan metode sol gel dan teknik pelapisan dengan metode spin coating. Lapisan tipis PZT menunjukkan sifat piezoelektrik maksimum apabila struktur kristalnya membentuk fase perovskite dengan perbandingan tertentu Zirkonium-Titanum di daerah MPB. Tujuan penelitian adalah untuk mengetahui pengaruh penambahan timah hitam terhadap struktur Kristal lapisan tipis PZT. Pengaruh timah hitam dibuat dengan cara menambahkan bahan sumber timah hitam berlebih pada tahap sintesis. Pelapisan larutan gel PZT pada silikon dilakukan dengan teknik spin coating, hasil spin coating dilakukan annealing pada suhu 600C dan dikarakterisasi dengan menggunakan XRD. Analisis XRD pada lapisan tipis PZT dengan variasi penambahan Pb di daerah MPB menghasilkan struktur polikristalin perovskite. Untuk semua lapisan tipis PZT dengan perbandingan prosentase timah hitam 100:102:104 pada variasi Zirconium-Titanum 52:48 menunjukkan prosentase fase tetragonal perovskite yang lebih besar dibandingkan dengan fase rhombohedral perovskite. Semakin banyak jumlah timah hitam yang digunakan untuk mensintesis PZT maka ada kecenderungan berkurangnya prosentase fase tetragonal atau bertambahnya persentase fase rhombohedral kecuali untuk lapisan tipis PZT dengan perbandingan (102:52:48).

PENGARUH KECEPATAN PUTAR DEPOSISI TERHADAP STRUKTUR KRISTAL, KETEBALAN DAN MORFOLOGI LAPISAN TIPIS TIMBAL ZIRKONAT TITANAT (PZT) DENGAN METODE SPIN COATER Johnson Nune Naat; Rachmat Triandi Tjahjanto; Masruroh Masruroh
Chimica et Natura Acta Vol 2, No 2 (2014)
Publisher : Departemen Kimia

Telah dilakukan penelitian pengaruh kecepatan putar terhadap struktur kristal, morfologi, ketebalan dan ukuran butir lapisan tipis PZT. Teknik pelapisan PZT dilakukan dengan spin coating dengan variasi kecepatan putar 2000, 3000 dan 4000 rpm. Kualitas kristal lapisan tipis PZT yang dihasilkan dikarakterisasi dengan XRD dan morfologi serta tampang lintang diobservasi dengan pencitraan SEM. Hasil karakterisasi menunjukkan puncak-puncak yang muncul adalah kristal perovskit dengan orientasi bidang kristal (001), (100), (101), (110), (200), (201) & (210), dan (022). Semakin tinggi kecepatan putar makaketebalanlapisan PZT semakin tipis dan berpengaruh terhadap intensitas orientasi bidang kristal yang semakin menurun, serta morfologi permukaan semakin halus, rata dan homogen. Ketebalan pada kecepatan putar 2000, 3000 dan 4000 rpm berturut-turut 13,82; 12,66 dan 10,84 μm serta ukuran butir untuk masing-masing kecepatan putar sekitar 0,6429; 0,6851 dan 0,4237 μm. Hal ini dikarenakan semakin tinggi kecepatan putar mengakibatkan gaya sentrifugal semakin besar sehingga gel PZT terdistribusi secara merata dan homogen di atas permukaan substrat.

Development of Multiphase Diffraction Pattern Analysis Technique with Rietveld Refinement Method: PZT Thin Case Study Rizky Arief Shobirin; Masruroh Masruroh; Rachmat Triandi Tjahjanto
Natural B, Journal of Health and Environmental Sciences Vol 4, No 1 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

In this research has been developed multifasa diffraction pattern analysis technique with rietveld refinement method with case study of application of the technique on thin layer of PZT (PbZrxTi (1-x) O3) which has been synthesized with variation of 1, 2, and 3 hour annealing time. This interpretation technique begins with the determination of the background, then performed refinement parameter determinant of pattern change, peak shape, and intensity of diffraction. The parameters are, respectively, scaling factor, 2θzero, lattice parameter, gaussian peak shape constant, and gaussian-lorentzian, atomic position coordinates, and preferred orientation. The refinement results show that changes in peak shape constant give significant changes in residual values, whereas atomic and preferred orientation changes do not provide significant change in residual values.

Ozone Determination: A Comparison of Quantitative Analysis Methods Rachmat Triandi Tjahjanto; Dhesy Galuh R.; Sri Wardhani
The Journal of Pure and Applied Chemistry Research Vol 1, No 1 (2012)
Publisher : Chemistry Department, The University of Brawijaya

A comparison of ozone quantitative analysis methods by using spectrophotometric and volumetric method has been studied. The aim of this research is to determine the better method by considering the effect of reagent concentration and volume on the measured ozone concentration. Ozone which was analyzed in this research was synthesized from air, then it is used to ozonize methyl orange and potassium iodide solutions at different concentration and volume. Ozonation was held for 20 minutes with 363 mL/minutes air flow rates. The concentrations of ozonized methyl orange and potassium iodide solutions was analyzed by spectrophotometric and volumetric method, respectively. The result of this research shows that concentration and volume of reagent having an effect on the measured ozone concentration. Based on the results of both methods, it can be concluded that volumetric method is better than spectrophotometric method.

Effect of Tin Electrode (Sn), Electrode Distance and Thin Layer Size of Zinc Phthalocyanine (ZnPc) to Resistance Changes With Ozone Exposure Agustina Mogi; Masruroh Masruroh; Rachmat Triandi Tjahjanto
The Journal of Pure and Applied Chemistry Research Vol 7, No 1 (2018): Edition January-April 2018
Publisher : Chemistry Department, The University of Brawijaya

This study was aimed to determine the effect of tin electrode distances and the thickness of a thin layer of ZnPc (Zinc phtyalocyanine) toward changes in resistance with ozone exposure. Tin deposition on the glass surface was conducted using spraying method. The reaction between ozone and ZnPc produces electrical properties that can be read through the resistance value of the multimeter. Based on this study, it was investigated that the smaller a distance between the electrode and the thicker deposition of ZnPc lead to the less resistance. This showed that a thin layer of the conductivity increases along with the longer exposure to ozone gas. The movement of electrons with the hole was free.

Study of Hydrolysis on Pb(ZrxTi1-x)O3 Synthesis Using Zirconium(IV) Nitrate as Precursor and Their Densification Process Akhmad Al-bari; Rachmat Triandi Tjahjanto; Masruroh Masruroh
The Journal of Pure and Applied Chemistry Research Vol 7, No 3 (2018): Edition September-December 2018
Publisher : Chemistry Department, The University of Brawijaya

Pb(ZrxTi1-x)O3 has extensive application in electronic components as a thin layer. The densification layer is controlled by some factor such as precursor composition and heating techniques. Therefore, it is necessary to get simply precursor synthesis from zirconium(IV) nitrate stabilized polyol-acetate. In other hand, hydrolysis factor and the heating rate are affected as well as factor control. The PZT synthesis (55:45) was varied in Rw ratio as comparing water mole and the total mole of metal. The result of Rw = 0, 6, 9, and 12 are coated on silicon substrates and annealed with heating rates variate 1, 5, 10, and 30 °C/min for 650°C. The characterization and analysis were performed with FTIR and a microscope. Furthermore, the thermal dynamic behavior and crystal orientation are observed. The results show PZT synthesis from zirconium(IV) nitrate precurseor and PEG-acetate was stable and that can reproduce. The effect of rising of heating rate causes the dissipating PZT agglomeration, while the addition of water causes the cracking of crystals to become more massive.

Study of Sodium Chloride Production Using Gradual Evaporation of Seawater from Nggolonio Sea, East Nusa Tenggara Ernesta Wae; Rachmat Triandi Tjahjanto; Diah Mardiana
The Journal of Pure and Applied Chemistry Research Vol 10, No 2 (2021): Edition May-August 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.02.483

Sea water as a raw material resources for the kitchen salt production, besides containing NaCl, has also containing other dissolved salts such as hygroscopic calcium and magnesium salts. The high content of other salts cause industrial NaCl has a low quality. This aim research was to find out the effect of seawater evaporation on NaCl content changes. Seawater obtained from Nggolonto, Nagekeo, NTT, was used with an initial volume of 200 mL, then it was concentrated in varying of final volume, i.e. 20, 23, 25, 27 and 29 mL. The NaCl content was calculated based on total chloride ion content, corrected toward magnesium and calcium ions content and the presence of sulphate anion. In addition, the chloride and magnesium also calcium ions content was analyzed volumetrically, while the sulphate anion was determined spectrophotometrically. The research result showed that NaCl content increase significantly up to 27 mL of final volume and was constantly afterward. Furthermore, the highest of NaCl content obtained from final volume of 29 mL was 96.01%. Nevertheless, comparing to SNI 06-0303-1989, its content was still below the standard of 98.5%.

Adsorption of Lead and Copper Using Water Hyacinth Compost (Eichornia Crassipes) Kiky Frederika Rumapar; Barlah Rumhayati; Rachmat Triandi Tjahjanto
The Journal of Pure and Applied Chemistry Research Vol 3, No 1 (2014)
Publisher : Chemistry Department, The University of Brawijaya

Adsorption ofheavy metals Pb and Custudies have been carried out usinga compost of plant water hyacinth (Eichornia crassipes). First steps of the compostingis fermenting fresh hyacinth plants that have been enumeratedwithmolasses and water. Once formed, the compost is used as an adsorbent for the adsorption of heavy metals Pb and Cu. After that process, the water hyacinth compost have been characterized to determine the humic acid content, as well as the functional group content of heavy metals Pb and Cu. Determination of general conditions on the adsorption of Pb and Cu performed with adsorbent mass variations, variations in pH and the concentration variation and studying adsorption isotherm. The results showed that the adsorption of Pb in optimum condition occurs in adsorbentmass of 1.2 g with pH 5. As for the adsorption of Cu on the optimum conditions occur in the adsorbent mass of 0.8 g at pH 6. Results also able to adsorb up to 95.13% Pb andup to 91.42% Cu. Pb and Cu adsorption using adsorbents of water hyacinth compost more models to follow Langmuir than Freundlich models.

Determination of Hydroquinone in a Square Wave Voltammetry based on Screen Printed Carbon Electrode Alfita Safitri; Ani Mulyasuryani; Rachmat Triandi Tjahjanto
The Journal of Pure and Applied Chemistry Research Vol 4, No 1 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Hydroquinone is a phenolic compound are often used extensively in the cosmetics industry as whitening agent. This compound is very toxic and their use should be monitored. Due to the impact of hydroquinone, the use of hydroquinone restricted by BPOM (Food and Drug Regulatory Department in Indonesia) maximum by 0.02%. The aim of this study was to establish a new simple sensitive voltammetry method for determination of hydroquinone using screen printed carbon electrode (spce). In this study, linear concentration range, limit of detection, sensitivity and accuracy were investigated. Before the determination of parameters analysis, the method require the optimization of method parameters such as frequency and pulse height. This study were showed that the measurement of hydroquinone with square wave voltammetry method has linear concentration range 1 - 100µM, limit of detection 23.4µM, sensitivity 0.075µM/µA and accuracy 0.9969. The proposed method was succesfully applied in whitening cream cosmetic samples with good enough results.

Fabrication of Oxide Ceramic MgFe2O4 Using Iron Oxide Isolated from Lapindo Mud as a Raw Material Riska Yudhistia Asworo; Rachmat Triandi Tjahjanto; Akhmad Sabarudin
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

The quite high content (28.8%) of iron oxide (Fe2O3) in Lapindo Sidoarjo`s mud promotes as a potential raw material for fabrication of oxide ceramics. The preeminence magnetic properties of iron oxide materials have led to be widely used for preparation of noteworthy products i.e semiconductor ceramics. However, the high band gap of iron oxide results in high resistivity, limiting its application as semiconductor ceramics. The addition of other oxides to iron oxide is able to reduce the energy gap of resulted oxide ceramics. Accordingly, in this study, MgO is added to Fe2O3 isolated from Lapindo mud for preparation of the oxide ceramic MgFe2O4. The products are characterized, which include crystal structure, crystal size and resistivity. It was found that the addition of MgO decreased the volume fraction of spinel structure formation, the average of crystal size, and the resistance value. The ratio MgO/Fe2O3 of 3:7 and a sintering temperature of 1300oC show the optimum composition for fabrication of MgFe2O4 with the volume fraction of 0.72 and the crystal size of 49.06 nm as characterized by XRD.

Co-Authors A.A. Ketut Agung Cahyawan W Abd. Rahman Abdul Rahman Afida, Laely Nur Agus Farid Fadli Agustina Mogi Ahmad Fudhail Majid Ahmad Naufal Hasti Eka Putra Akhmad Sabarudin Alfina, Bulan Tahta Alfita Safitri Andi Nafis An Naafi Angga Fami Rayendra Anggriana Novitasari, Anggriana Ani Mulyasuryani Anjani, Ryzki Martha Anna Safitri Ardhi, Tunjung Nourman Sasono Asrianda Asrianda Barlah Rumhayati Barlah Rumhayati Christiana Adi Damayanti Danar Purwonughroho Danar Purwonugroho Danar Purwonugroho Darjito Darjito Darjito, Darjito Dhesy Galuh R. Dhesy Galuh Ratnawati Diah Mardiana Diana Eka Pratiwi Diana Eka Pratiwi Didik Pramana Dita Anggarini Eko Waluyo Elvina Dhiaul Iftitah Elvina Dhiaul Iftitah Elvina Dhiaul Iftitah Erica Marista Rosida Ernesta Wae Faisal Maulana Malik Ibrahim Faustina De Yesu Prisila Abi Finisia, Yenni Herinda Sensustania Hidayat, Rusdhi Nur I Wayan Adi Suarya I Wayan Wira Yuda Iftitah, Elvina Dhiaul Ika Oktavia Wulandari Imam Fathoni Isnaini, Yulia Nur Khoirun Nisyak Khoirun Nisyak Kiky Frederika Rumapar Lapailaka, Titus Layta Dinira Lidya Rosnita Masruroh MASRUROH Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh Meirawati, Dian Mohammad Abdul Ghofur Mohammad Farid Rahman Mohammad Misbah Khunur Muchammad Zainul Anwar Muhammad Misbah Khunur Muhlis Muhlis Naat, Johnson N. Nafikah, Fifi Nik Matul Ula Nisyak, Khoirun Oktaria Ardika Pratama, Oky Yoga Purwonugroho, Danar Rendrahadi, Randhy Dwi Riska Yudhistia Asworo Rizky Arief Shobirin Roosdiana, Anna Rosmawati, Angelina Rosyida, Firdania Firdaus S.J. Iswarin Siti Mariyah Ulfa Sri Wardhani Suriati Eka Putri Ulfa Andayani Ulfa Anggraini Uswatun Hasanah Utomo, Edi Priyo Vita Valiana Widyasari, Elok Nuri Yuniar Ponco Prananto Zaemi, Haris ZAINUL ABIDIN Zulfikar, Mochammad Abrianto

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