Article Per Year (5 Year)
p-Index From 2020 - 2025
2.096
P-Index
This Author published in this journals
All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar BERKALA SAINSTEK Alchemy Jurnal Penelitian Kimia UNEJ e-Proceeding ALCHEMY Jurnal Penelitian Kimia Indonesian Chimica Letters Molekul: Jurnal Ilmiah Kimia InSTEM Bulletin of Chemical Reaction Engineering & Catalysis
Tanti Haryati
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Jember
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

Published : 29 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 29 Documents
Search

 1   2   3 
THE EFFECT OF SOL-GEL TEMPERATURE AND SOLVENT POLYETILEN GLYCOL (PEG) IN ZnO- TiO2 PHOTOCATALYST ACTIVITY AS DEGRADER OF TEXTILE DYEING LIQUID WASTE Haryati, Tanti; Andarini, Novita; Mardhiyah, Siti
Alchemy Jurnal Penelitian Kimia Vol 10, No 2 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of TiO2 powder as photocatalyst still provides some disadvantages such as the difficulties in regenerate ion, the low adsorption and turbulence. These problems can be overcomed by providing the photocatalyst as a composite of ZnO-TiO2. This research aims to investigate the effect of composition of solvent and temperature of synthesis on the quality and photocatalytic activity of ZnO-TiO2 which was prepared by sol-gel method. The photocatalytic activity was determined by applying the composite in degradation of Procion Red MX-8B under irradition of UV light for 24 hours. The procion red concentration after degradation was determined by UV-Vis spectrophotometer. Meanwhile the effect of synthesis temperature on crystal structure of composite was studied by XRD. The results show that the composite which was prepared by PEG 1500 at 1:4 of moles ratio and at 70oC of synthesis temperature has highest degradation percentage, i.e. 55.375 % and photocataltic activity of 3.561 x 10-7 mg/cm2s.
PENGARUH EKSTRAK KASAR TANIN DARI DAUN BELIMBING WULUH (AVERRHOA BILIMBI L.) PADA PENGOLAHAN AIR Kristianto, Aries; Winata, I Nyoman Adi; Haryati, Tanti
BERKALA SAINSTEK Vol 2, No 1 (2014)
Publisher : My Home

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian tentang pengaruh ekstrak kasar tanin dari daun belimbing wuluh (Averrhoa bilimbi L.) pada pengolahan air telah dilakukan. Ekstrak kasar tanin diperoleh dengan cara maserasi dengan metanol 50% terhadap serbuk kering daun belimbing wuluh (A. bilimbi L.). Selanjutnya ekstrak kasar tanin dikombinasikan dengan koagulan FeCl3 dan FeSO4. Pada pengolahan air parameter yang diamati adalah pH, kekeruhan, padatan terlarut dan daya hantar listrik. Penambahan ekstrak kasar tanin dengan FeCl3 pada kondisi optimum (125 mg/L tanin dan 50 mg/L FeCl3) dapat menurunkan kekeruhan, pH, padatan terlarut dan daya hantar listrik berturut-turut sebesar 72,43%, 47,24%, 86,13% dan 5,44%. Penambahan ekstrak kasar tanin dengan FeSO4 pada kondisi optimum (150 mg/L tanin dan 60 mg/L FeSO4) dapat menurunkan kekeruhan, pH berturut-turut sebesar 6,98%, 25,20%, padatan terlarut tidak dapat didefinisikan dan daya hantar listrik mengalami kenaikan sebesar 5,81%. Pada penambahan tanin tanpa kombinasi koagulan pada kondisi optimum (125 mg/L) dapat menurunkan kekeruhan sebesar 19,14%, pH mengalami kenaikan sebesar 19,33%, dan menurunkan padatan terlarut dan konduktivitas berturut-turut sebesar 69,33% dan 2,70%. Kata kunci: Averrhoa bilimbi L., koagolan, tanin.
Dye-Sensitized Solar Cells (Dssc) Using Natural Dyes Extracted From Red Cabbage And Counter Electrode Based Tio2-Graphite Composites Haryati, Tanti; Mulyono, Tri; Oktavianawati, Ika; Badrianto, Wawan
UNEJ e-Proceeding Indonesian Protein Society (IPS), International Seminar and Workshop 2014
Publisher : UNEJ e-Proceeding

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dye sensitized solar cells (DSSC) has been a popular research topic which benefits in high energy conversion efficiency and less cost in fabrication process. The components of DSSC consist of photoanode, electrolyte, and counter electrode that are arranged as sandwich. The photoanode contains ITO (indium tin oxide) glass covered by TiO2 particles, while the counter electrode contains ITO glass covered by composite of TiO2-graphite as counter electrode and red cabbage extract, as a dye agent. The cell was fabricated in various amount of graphite, i.e 10%; 30%; and 50 %, and time of soaking i.e 2; 13; 24; and 48 hours. The performance of the solar cell per active area of ​​1 cm2 was tested on irradiation of 75 Watt halogen lamp (distance 15 cm) and measured by multimeter and rheostat. The optimum synthesis condition of DSSC was obtained with composition of TiO2:graphite on the counter electrode is 70%:30 %, and soaking time in dye agent is for 24 hours. This cell results in an optimum performance, Isc = 0.028 mA ;Voc = 0.344 mV, FF = 0.29 and = 0.0055 % efficiency. Keywords: DSSC, Red Cabbage, Counter Electrode
Isolasi Emas dari Larutan Kompleks Emas Thiourea Hasil Ekstraksi dengan Metode Elektrolisis Nursiah, N.; Haryati, Tanti; Andarini, Novita
BERKALA SAINSTEK Vol 7 No 1 (2019)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v7i1.9917

Abstract

Emas merupakan logam mulia dan memiliki nilai ekonomi yang tinggi. Metode pemisahan emas dari campurannya yang biasa digunakan yaitu amalgamasi dan sianidasi, namun keduanya menghasilkan limbah yang dapat merugikan lingkungan dan makhluk sekitarnya. Metode isolasi alternatif yang dapat digunakan yakni dengan leaching menggunakan pelarut thiourea dilanjutkan dengan pemisahan kompleks yang terbentuk dengan elektrolisis. Penelitian ini bertujuan untuk menentukan waktu optimum dan luas permukaan katoda optimum menggunakan karbon selama elektrolisis berlangsung. Variasi waktu elektrolisis yang diterapkan sebesar 60; 90; 120; 150; 180; dan 210 detik. Waktu optimum yang diperoleh yaitu pada 150 detik dengan persentase penurunan Au dalam larutan sebesar 98,99% diikuti kenaikan massa katoda sebesar 0,02 mgram. Elektrolisis selanjutnya dilakukan dengan variasi luas permukaan katoda karbon 0,1256; 0,2462; dan 0,5064 cm2 dengan waktu 150 detik. Luas permukaan optimum yang diperoleh pada 0,2462 cm2 dengan hasil penurunan Au dalam larutan sebesar 98,459% dan kenaikan massa katoda 0,020 mgram. Kata Kunci: elektrolisis, emas, leaching, thiourea.
The Effect of Different Precursor Concentration on The Synthesis of CaO Nanoparticles with Coprecipitation Methods for Palm Oil Transesterification Catalysis Novita Andarini; Ria Sherly Farida; Tanti Haryati
Reaktor Volume 21 No. 2 June 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.348 KB) | DOI: 10.14710/reaktor.21.2.45-51

Abstract

Calcium oxide nanoparticles was prepared by coprecipitation method using calcium acetate as precursor and calcined at 800 °C for 6 hours. This work studied the effect of different precursor concentrations on the size of calcium oxide obtained and its applicated for palm oil transesterification catalysis. Characteristics of samples were measured by XRD and SEM et al techniques. The results showed that the diffraction pattern of CaO has the same diffraction pattern as the XRD standard diffraction pattern from the Joint Committee on Powder Diffraction Standard (JCPDS). Calcium oxide analysis using SEM shows the morphology of particles that agglomerate almost all variations in precursor concentration. The particle size increases with increasing precursor concentration. The smallest particle size of 55.758 nm was produced on solid CaO from the lowest precursor concentration of 0.05 M. The catalytic activity of activated calcium oxide nanoparticle compound was tested in the production of methyl esters. The conversion of triglycerides in palm oil into methyl esters was 90.34%.Keywords: nanoparticles, calcium oxide, coprecipitation, precursor, catalys, metyl ester 
Dye-Sensitized Solar Cells (Dssc) Using Natural Dyes Extracted From Red Cabbage And Counter Electrode Based Tio2-Graphite Composites Tanti Haryati; Tri Mulyono; Ika Oktavianawati; Wawan Badrianto
UNEJ e-Proceeding Indonesian Protein Society (IPS), International Seminar and Workshop 2014
Publisher : UPT Penerbitan Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dye sensitized solar cells (DSSC) has been a popular research topic which benefits in high energy conversion efficiency and less cost in fabrication process. The components of DSSC consist of photoanode, electrolyte, and counter electrode that are arranged as sandwich. The photoanode contains ITO (indium tin oxide) glass covered by TiO2 particles, while the counter electrode contains ITO glass covered by composite of TiO2-graphite as counter electrode and red cabbage extract, as a dye agent. The cell was fabricated in various amount of graphite, i.e 10%; 30%; and 50 %, and time of soaking i.e 2; 13; 24; and 48 hours. The performance of the solar cell per active area of ​​1 cm2 was tested on irradiation of 75 Watt halogen lamp (distance 15 cm) and measured by multimeter and rheostat. The optimum synthesis condition of DSSC was obtained with composition of TiO2:graphite on the counter electrode is 70%:30 %, and soaking time in dye agent is for 24 hours. This cell results in an optimum performance, Isc = 0.028 mA ;Voc = 0.344 mV, FF = 0.29 and = 0.0055 % efficiency. Keywords: DSSC, Red Cabbage, Counter Electrode
CHARACTERIZATION OF SULFONATED POLYSULFONE/BENTONITE HYBRID MEMBRANES Bambang Piluharto; Imam Syafi’i; R. Indahsari; Tanti Haryati
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.616 KB) | DOI: 10.19184/jid.v13i1.630

Abstract

Sulfonated polysulfone membrane is one of the alternative membranes as replacing Nafion membrane for the fuel cell application. This membrane was prepared by introducing sulfonic group in the polysulfone structure backbone, so that provides the ionic membrane. However, more ionic groups in the SPSF membrane lead to loss mechanical stability. This study aims to prepare the hybrid membrane from SPSF and bentonite. In here, various of bentonite concentrations were used as variable to study water uptake and ion-exchange capacity properties. As the results, increasing bentonite concentrations lead to increase water uptake and ion-exchange capacity. By the functional group analysis, proved that adding bentonite in SPSF did not change structure of SPSF, means that interaction between SPSF and bentonite were physical interactions.
SYNTHESIS THIN LAYER ZnO-TiO2 PHOTOCATALYSTS SOL GEL METHOD BY USING THE PEG (Polyethylene Glycol) AS SOLVENT Tanti Haryati; Novita Andarini; Mellisa Ika Febrianti
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1798.938 KB) | DOI: 10.19184/jid.v13i1.625

Abstract

The incorporation of TiO and ZnO material as a composite, to increase the activity of the catalyst. Synthesis of ZnO-TiO2 thin layer made using a sol-gel method with a variation of PEG as a solvent. The purpose of this research was to investigate the structure and morphology of ZnO-TiO2 thin layer on the variation of PEG as a solvent by sol-gel method . Preparation of ZnO sol of the precursor , while the TiO2 sol synthesized by dissolving the anatase TiO2 structure into polyethilen glycol . Sol of ZnO and TiO2 sol do sol mixing to form ZnO–TiO2 after it coated on a glass substrate and then calcined . Products were then characterized by X-ray diffraction to determine the crystal structure and SEM to determine its morphology . The test results show the crystal structure by XRD based difaktogram intensity , the greater the molecular weight of the PEG peak intensity of ZnO-TiO2 showed the lower. While based on morphological examination , it can be seen that the larger molecular weight PEG , ZnO - TiO2 granular greater.
FLOW INJECTION POTENTIOMETRIC ANALYSIS OF ASPARTIC ACID, GLUTAMIC ACID AND ASCORBIC ACID USING PLATINUM ELECTRODES Yeni Maulidah Muflihah; Siswoyo Siswoyo; Tanti Haryati; Kiki Puji Setianingrum
Jurnal ILMU DASAR Vol 13 No 1 (2012)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.474 KB) | DOI: 10.19184/jid.v13i1.886

Abstract

The presence of  weak acids in solution can be detected using a potentiometric detector. Platinum was used as a working electrode and Ag/AgCl as a reference electrode. Ascorbic, glutamic and aspartic acid were detected by a platinum electrode in a flow potentiometric system. The influence of pH, flow rate and concentration of phosphate buffers asa a carrier were studied and showed an optimum pH for the detection of ascorbic and glutamic acid at pH 6,5 and pH 7,0 for aspartic acid. Phosphate buffer concentration optimum at 1x10-4M and flow rate of 1,00 mL/min. Linear range for ascorbic and glutamic acid at 2,5 x10-4M to 5x10-2M, with a regression coefficient of  0,974 and 0,958, while for aspartic acid 5x10-4M to 5x10-2M with a regression coefficient 0,911. Detection limit for ascorbic and glutamic acids were 5x10-4M and 1x10-3M for aspartic acid. Sensor reproducibility obtained from variation coefficient  (Kv). Variation coeffiecient (Kv) of ascorbic acids 1,32-1,69%, glutamic acids 0,69- 1,57% and aspartic acid 0,54- 1,29%.
Pengaruh Konsentrasi Asam Terhadap Sifat Fisik dan Muatan Permukaan Selulosa Termodifikasi Agus Wedi Pratama; Bambang Piluharto; Dwi Indarti; Tanti Haryati; Hardian Susilo Addy
ALCHEMY Jurnal Penelitian Kimia Vol 15, No 2 (2019): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.15.2.33756.315-328

Abstract

Selulosa merupakan salah satu biopolimer melimpah yang banyak digunakan dalam berbagai bidang seperti kertas, energi dan material komposit. Hidrofilisitas, dapat diperbaharui, ramah lingkungan dan aman adalah sifat-sifat selulosa yang dapat berpotensi menjadi material maju. Berdasarkan sifat-sifatnya, selulosa dapat dimodifikasi untuk menghasilkan sifat fungsional yang sesuai dengan aplikasinya. Dalam penelitian ini, selulosa mikrokristalin (MCC) dimodifikasi melalui metode hidrolisis asam. Prinsip metode ini adalah penghilangan bagian amorf pada selulosa oleh asam, meninggalkan bagian kristal. Selain itu, ketika asam digunakan sebagai agen hidrolisis, maka akan menghasilkan muatan permukaan pada selulosa. Dalam penelitian ini, pengaruh berbagai konsentrasi asam pada struktur kimia, kristalinitas, morfologi dan muatan permukaan telah dikaji. Perubahan struktur selulosa dianalisis menggunakan Fourier Transform Infra Red (FTIR), kristalinitas menggunakan X-ray Diffraction (XRD), morfologi menggunakan Scanning Electron Microscopy (SEM) dan muatan permukaan menggunakan titrasi konduktomteri. Hasil analisis FTIR menunjukkan masuknya gugus sulfat pada struktur selulosa. Analisis XRD menunjukkan peningkatan kristallinitas dalam selulosa termodifikasi seiring bertambahnya konsentrasi asam. Hasil analisis morfologi menunjukkan partikel dalam selulosa termodifikasi (CM) lebih tersebar daripada MCC. Analisis titrasi konduktometri menunjukkan bahwa mengalami peningkatan muatan permukaan pada CM seiring dengan bertambahnya konsentrasi asam. Oleh karena itu, dapat disimpulkan bahwa pengaruh konsentrasi asam sulfat pada hidrolisis selulosa memberikan dampak yang signifikan pada sifat fisik dan muatan permukaan.Effect of Acid Concentration on Physical Properties and Surface charge of Modified Cellulose. Cellulose is one of abundant biopolymer that many widely used in various applications such as paper, energy and composite material. Hydrophilicity, renewable, biodegradable, and safety are cellulose properties that can became potential of advance materials. In the utilization, cellulose can be modified its properties for different purposes. In this work, microcrystalline cellulose (MCC) was modified by acid hydrolysis method. The principle of this method is removed amorphous region of cellulose by acid and leaving crystalline phase. Moreover, when acid was used as hydrolyzing agent, it produce the surface charge on cellulose. In this research, the effect of various concentration of acid on the chemical structure, crystallinity, morphology and surface charge have studied. The chemical structures were analyzed using Fourier Transform Infra Red (FTIR), crystallinity using X-ray Diffraction (XRD), morphology using Scanning Electron Microscopy (SEM), and surface charge using titration conductometric. The FTIR analysis result has successfully showed the entry of sulfate groups on the cellulose structure. The XRD analysis showed increasing crystallinity in Cellulose Modified (CM) with increase acid concentration. By morphology analysis, particles in CM more disperse than MCC. Analysis of conductometric titration shows that there is an increase in surface charge in CM as acid concentration increases. Thus, the effect of sulfuric acid concentration on hydrolysis of cellulose has a significant impact on physical properties and surface charge.
Co-Authors AA Sudharmawan, AA Agus Wedi Pratama Almu’minin, Achmad Sholikhudin Assiddiq, Mustafid A’yun Bambang Piluharto D. C, Hermawan Dewi, Widya Puspita Diana, Alvina Nur Dwi Indarti E., Supriyanto. Fachry Abda El Rahman Furqonul Hakin Al Hadi HARDIAN SUSILO ADDY I Nyoman Adi Winata Ika Oktavianawati Imam Syafi’i Kamila, Wilda Kiki Puji Setianingrum Lutfia, Zuhrotul Maziyyah, Deys Sya’fatul Mellisa Ika Febrianti Nasution, Annio Indah Lestari Nelumbium, Tusiana Putri Novita Andarini Novita Andarini Nursiah Nursiah, Nursiah Nursiah, N. Puspa, Aranca Nindya R. Indahsari Ramadhani, Ferlia Suci Ria Sherly Farida Rika Yulianti, Rika Roziqin, Achmad Zainur Sholehah, Hidayati Nur Mohammad Siswoyo Siswoyo Siti Mardhiyah Sofiyah, Ovy Sunnardianto, Gagus Ketut Sutisna Sutisna Suwardiyanto Suwardiyanto Suwardiyanto Suwardiyanto, S. Syamsul Arifin Tri Mulyono Wawan Badrianto Wawan Badrianto, Wawan Yeni Maulidah Muflihah Yudi Aris Sulistiyo, Yudi Aris Zakaria, Helmy Ahmad