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All Journal VALENSI International Journal of Renewable Energy Development JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Fisika Unand Jurnal Riset Kimia JFA (Jurnal Fisika dan Aplikasinya) Journal of Aceh Physics Society Elkawnie Lantanida Journal Jurnal Ilmu Fisika Bulletin of Chemical Reaction Engineering & Catalysis
Syukri Syukri
Department Of Chemistry, Andalas University, Jl. Universitas Andalas, Limau Manis, Padang
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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AMOBILISASI KOMPLEK KOBAL(II) PADA POLI(4-VINILPIRIDIN) DAN KARAKTERISASINYA -, Syukri; -, Safni; Fadhilla, Anna
Jurnal Riset Kimia Vol 4, No 1 (2010): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i1.110

Abstract

 ABSTRACTAcetonitrile ligated cobalt(II) complex was successfully immobilized on poly(4-vinylpyridine) (P4VP). The grafted material was characterized by Fourier Transform Infra Red (FTIR), Scanning Electron Microscope (SEM), UV-Visible Spectrometry, Thermal Gravimetry-Differential Thermal Analysis (TG-DTA) and Atomic Absorption Spectrophotometry (AAS). The FTIR measurement confirmed a successful grafting indicated by the presence of a weak donor-acceptor interaction between N of poly(4-vinylpyridine) with the Co2+ of the complex. A change of surface morphology after immobilization process was evidenced by SEM photographs. TG-DTA analysis showed that the attached Co(II) complex on P4VP was found to be moderately thermally stable. The metal leaching of the obtained heterogeneous catalyst measured by AAS was found to be less than 0.1%. Keywords: Immobilization, Grafting, Heterogeneous catalyst, Donor-acceptor interaction, Surface area, Metal leaching
DISAIN GEOMETRI REAKTOR FOTOSEL CAHAYA RUANG Zainul, Rahadian; Alif, Admin; Aziz, Hermansyah; Arief, Syukri; -, Syukri
Jurnal Riset Kimia Vol 8, No 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.230

Abstract

This research aims to obtain reactor design photocells that can convert light energy into electrical energy space. Room light energy derived from sunlight that comes into the room and fluorescent light irradiation. Photocells reactor using a panel of copper oxide (Cu2O/CuO) of calcined Cu plate and filler electrolyte Na2SO4 0.5 N. The design of the geometry of the reactor photocells covering thickness of the glass pane, the distance between the electrodes, the interface layer, layer and coating reflector panels, and junction type np used. Reactor photocells 1 (R1) and 2 (R2) is identical in geometry to the thickness of the glass panel 3 mm thick reactor 15 mm without anti reflector, but the difference at the junction of type n, (R1 = plate Cu; R2 = plate Aluminum) generate 182.82 mW/m2 and 21119644.3 NW/m2. Design R3 (junction-type n = plate Cu) and R4 (junction-type n = plate Al), a panel thickness of 15 cm and has a layer anti reflector provide power 214.95 mW/m2 and 24163298.3 NW/m2. Design Reactor 5 (R5 = Cu) and R6 (Al), thickness of 9 mm, the distance between the electrodes 0:30 mm, using anti reflector carbon, giving each the power of 277.36 mW/m2 and 31258420.91 NW/m2. The most optimum reactor design is the design of R6 with 2:14% conversion capabilities (Intensity = 90.21 foot candles) for the sunlight into the room.
SYNTHESIS AND CHARACTERIZATION OF MODIFIED MESOPOROUS SILICA-IMOBILIZED Cu(II)-ACETONITRILE COMPLEX AND ITS APPLICATION IN TRANSESTERIFICATION OF FRYING OIL -, Syukri; Pratikha, Rycce Sylviana; Jamarun, Novesar
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.184

Abstract

 ABSTRACTMesoporous silica has attracted rapidly growing attention in catalysis. In this work, mesoporoussilica was synthesized by using CTAB surfactant and then modified by AlCl3. Such materialwas used as support for Cu(II)--acetonitile complex and applied in transesterification of fryingoil. The XRD pattern of the obtained silica confirms the availability of chracteristic peak onsilica surface while its TEM exhibits the uniformity of nanochannel of the mesoporous silica.The particle size of silica support has become smaller after grafting process showed by SEMimages. FT-IR spectra of the materials indicated that the Cu(II) grafted on the mesoporoussilica was in the form of its acetonitrile complex. Supprisingly, the Cu loading the graftedcatalyst was found to be very high. That was 21%, when the catalyst applied ontransesterification of the examined frying oil the amount of total methyl ester yielded were of65%.Keywords: mesoporous silica, AlCl3, Cu(II)-acetonitrile complex, transesterification
PEMBUATAN DAN KARAKTERISASI KATALIS ZnO/KARBON AKTIF DENGAN METODE SOLID STATE DAN UJI AKTIFITAS KATALITIKNYA PADA DEGRADASI RHODAMIN B Septiani, Upita; Bella, Ilona; -, Syukri
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.186

Abstract

 ABSTRACTComposite catalyst ZnO/Activated Carbon (ZnO/AC) had been synthesized successfully bysolid state method. Synthesis was done by varying the addition of activated carbon (AC) 2%,5%, and 10% ZnO mass. Composite catalyst were calcinated at 400oC and characterized byFTIR (Fourier Transform Infra Red), XRD (X-Ray Diffraction), SEM (Scanning ElectronMicroscopy). Based on the results of FTIR, absorption appeared in the region wave number1400-1600 cm-1, which indicated stretching of C=C was assumed come from AC. From theXRD results, it was known by the addition of AC, not overly change the crystallinity and crystalsize of ZnO, the crystal structure is hexagonal (wurtzite). SEM images showed AC preventedthe agglomeration of ZnO that would expand the surface area of ZnO and increased catalyticactivity of ZnO. For the results of the catalytic activity test, catalyst ZnO/AC was tested on thedegradation of Rhodamine B solution (10 ppm) by UV light irradiation, where the increasingnumber of trains the catalytic ability of ZnO also increased, it could be concluded that activatedcarbon can support to increase the role of ZnO in degrading Rhodamine B.Keywords: composite catalyst, ZnO, activated carbon, solid state, Rhodamine B
GRAFTING TEMBAGA(II) PADA SILIKA MODIFIKASI -, Syukri
Jurnal Riset Kimia Vol 4, No 2 (2011): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i2.116

Abstract

 ABSTRACT A copper(II) acetonitrile complex has been grafted on modified silica and characterized by Fouruer Transform Infra Red (FTIR) and Energy Dispersive X-ray (EDX). The succesful experiment was confirmed by the appearance of shifted CN stretching vibration of acetonitrile on modified silica surface (FTIR analysis). The amount of copper(II) loaded by the silica was of ~ 7 % proven by EDX measurement.  Key words: Grafting process, modified silica, metal loading 
DEGRADASI MALACHITE GREEN OXALATE SECARA FOTOLISIS DAN OZONOLISIS DENGAN PENAMBAHAN ZnO-SnO2 Bhernama, Bhayu Gita; -, Syukri; -, Safni
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.169

Abstract

Vol 7 No 2ABSTRACTDegradation of malachite green oxalate (MGO) compounds has been carried out by ozonolysisand photolysis methods with addition of ZnO-SnO2 as catalyst. MGO solution was analyzed bya spectrophotometer UV/Vis at 250-650 nm. The results showed that ozonolysis process fasterthan photolysis. 6 mg/L MGO can be degraded as much as 97.3% after irradiated with UV light(369 nm) within 150 minutes with the addition of 0.020 g of ZnO-SnO2. Otherwise, 99.6% of 6mg/L MGO can be degraded by ozonolysis process within 5 minutes by the addition of 0.025 gof ZnO-SnO2. Analysis of the remaining MGO solution by reverse-phase HPLC showedintermediate-substances peaks and peak height of MGO at a retention time of 3.18 mindecreased as the data obtained using a UV/Vis spectrophotometer.Keywords: degradation, MGO, photolysis, ozonolysis, ZnO-SnO2
DEGRADASI ZAT WARNA METANIL YELLOW DENGAN PENYINARAN MATAHARI DAN PENAMBAHAN KATALIS TiO2-SnO2 Bhayu Gita Bhernama; Safni Safni; Syukri Syukri
Lantanida Journal Vol 3, No 2 (2015)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.958 KB) | DOI: 10.22373/lj.v3i2.1653

Abstract

Degradation of Methanil yellow has been done. In this research the degradation process was done by sunlighting and using TiO2-SnO2 catalysis. The residu of methanil yellow was centrifuged and measured by UV/Vis Spectrophotometer at 300 – 600 nm after degradation. 6 mg/L of Methanil yellow and addition of 0,03 g TiO2-SnO2 for 150 min, gave the percentage of degradation 98,413% after lighted by sun with 1,13256 1015 foton cm-2/s intensity.
Pembuatan Karbon Aktif dari Tandan Kosong Kelapa Sawit sebagai Elektroda Superkapasitor Amelina Dwika Hardi; Rahma Joni; Syukri Syukri; Hermansyah Aziz
Jurnal Fisika Unand Vol 9, No 4 (2020)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (618.038 KB) | DOI: 10.25077/jfu.9.4.479-486.2020

Abstract

Pembuatan karbon aktif dari Tandan Kosong Kelapa Sawit (TKS) sebagai elektroda superkapasitor sudah diteliti. Karbon aktif dibuat dari proses karbonisasi dan aktivasi menggunakan Kalium Hidroksida (KOH). Karbon aktif TKS dikarbonisasi melalui pembakaran sampel pada suhu 400°C dan diaktivasi dengan KOH pada suhu 800°C dalam lingkungan gas nitrogen. Karbon aktif TKS dikarakterisasi menggunakan Energi Dispersive X-Ray (EDX),  X-Ray Difraction (XRD), Scanning Electron Miscroscopy (SEM), Surface Area Analyzer (SAA).  Komposisi unsur karbon yang dihasilkan dari karbon aktif TKS adalah sebesar 88,93 %wt.  Struktur kristalit dari  karbon aktif TKS menunjukkan struktur amorf pada sudut 2θ 26,20° dan 43,08°. Hasil analisis SAA dengan metode Brunauer-Emmet-Teller (BET) didapatkan luas permukaan karbon aktif TKS sebesar 898,229 m2/g. Pengukuran sifat listrik karbon Aktif TKS sebagai elektroda superkapasitor menggunakan larutan elktrolit H2SO4 1M dengan metoda Cyclic Voltametry (CV) didapatkan nilai kapasitansi spesifik sebesar 107,83 F/g. Preparation of activated carbon from Oil Palm Empty Fruit Bunch (TKS) as a supercapacitor electrode has been investigated. Activated carbon is made from carbonization and activation processes using Potassium Hydroxide (KOH). Activated carbon TKS is carbonized by burning the sample at 400°C and activated with KOH at 800°C in a nitrogen gas environment. Activated carbon TKS was characterized using Energi Dispersive X-Ray (EDX), X-Ray Difraction (XRD), Scanning Electron Miscroscopy (SEM), Surface Area Analyzer (SAA). The composition of the element carbon produced from activated carbon TKS is 88.93% wt. The crystallite structure of TKS activated carbon shows an amorphous structure at an angle of 2θ 26,20° and 43,08°. The results of the SAA analysis by the Brunauer-Emmet-Teller (BET) method showed that the surface area of the TKS activated carbon was 898.229 m2/g. Measurement of electrical properties of activated carbon TKS as a supercapacitor electrode using a 1M H2SO4 electrolyte solution with the Cyclic Voltametry (CV) method obtained specific capacitance values of 107.83 F /g.
STRUKTUR DAN SIFAT OPTIK LAPISAN TIPIS TiO2 (TITANIUM OKSIDA) YANG DIHASILKAN DENGAN MENGGUNAKAN METODE ELEKTRODEPOSISI Elsa Agustina; Dahyunir Dahlan; Syukri -
Jurnal Fisika Unand Vol 2, No 3: Juli 2013
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.2.3.%p.2013

Abstract

Telah dilakukan elektrodeposisi lapisan tipis TiO2 di atas substrat ITO (Indium Tin Oxide) dengan menggunakan larutan elektrolit TiCl4 (Titanium (IV) klorida) dan katalis H3BO3 (Boric Acid).  Didapatkan hasil karakterisasi XRD pada lapisan tipis TiO2  yang dideposisi menggunakan 1.5M TiCl4 tanpa menggunakan katalis H3BO3 berada dalam fase anatese sedangkan lapisan tipis TiO2 yang dideposisi menggunakan 1.5M TiCl4 dengan menggunakan katalis H3BO3 berada dalam fase rutile.  Spektrum UV-Vis menunjukkan lapisan tipis TiO2 dalam fase anatase memiliki energi gap sebesar 3,25 eV sedangkan dalam fase rutile memiliki energi gap sebesar 3,7 eV.  Hasil karaktarisasi SEM menunjukkan bahwa elektrodeposisi lapisan tipis TiO2 menghasilkan morfologi permukaan yang lebih halus pada sampel tanpa menggunakan katalis dibandingkan dengan elektrodeposisi sampel yang menggunakan katalis..  Berdasarkan hasil yang diperoleh, maka deposisi lapisan tipis TiO2 ini dapat dijadikan acuan untuk pemanfaatan pada aplikasi sel surya DSSC.
Sintesis dan Karakterisasi Sifat Optik Nanopartikel Silika yang Dilapisi Nanopartikel Emas Ebriyen Zeni; Mulda Muldarisnur; Syukri Syukri
Jurnal Fisika Unand Vol 7, No 1 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (143.054 KB) | DOI: 10.25077/jfu.7.1.21-26.2018

Abstract

Telah dilakukan sintesis dan karakterisasi struktur dan sifat optik nanopartikel silika yang dilapisi nanopartikel emas. Sintesis dilakukan pada suhu 95 °C dengan variasi rasio mol APTES terhadap gugus silanol pada nanopartikel silika sebesar 1,0 dan 1,4  serta Au 0,1 dan 0,2 ml. Karakterisasi dilakukan menggunakan FTIR, SEM-EDS, dan Spektrofotometer UV-Vis. Spektrum FTIR menunjukkan adanya ikatan antara APTES dengan silika pada daerah serapan sekitar 1500 cm-1 dan keberadaan nanopartikel emas ditunjukkan dari hasil SEM-EDS. Karakterisasi SEM  menunjukkan nanopartikel emas menempel pada permukaan silika. Respon magnetik sampel ditunjukkan dari hasil spektrofotometer UV-Vis dengan dua puncak yaitu resonansi dipol dan resonansi kuadrupol.Kata kunci: APTES, nanopartikel emas, nanopartikel silika, respon magnetik, sifat optik
Co-Authors Admi Admi Admin Alif Alif, Admin Amelina Dwika Hardi Anggia Arista Bhayu Gita Bhernama Dahyunir Dahlan Ebriyen Zeni Eldya Mossfika Elsa Agustina Emriadi - Fadhil Ferdian Fadhilla, Anna Fitria Ramadhani Fitria Ramadhani Florencia Tri Angellika Hermansyah Aziz Ilona Bella Kevin Septioga Mai Efdi Muldarisnur, Mulda Novesar Jamarun Rahadian Zainul Rahma Joni Rahma Joni Rycce Sylviana Pratikha Safni Safni Sry Wahyuni Sylvina Tebriani Syukri Arief Upita Septiani Yetria Rilda Yulia Eka Putri