Garuda - Garba Rujukan Digital

Characterization of Active Carbon Prepared from Coconuts Shells using FTIR, XRD and SEM Techniques Bakti, Andi Ikhtiar; Gareso, Paulus Lobo
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 7, No 1 (2018): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : UIN Raden Intan Lampung, Indonesia

Activated carbon is produced from coconut shells through physical and chemical activation. With pyrolysis method, the optimum activation temperature for physics activation is 600oC, and for chemical, activation is to soak it in activator ZnCl2 10% and Na2Ca3 10%. Activated carbon was analyzed by Fourier Transformation Infrared (FTIR) and X-ray Diffraction (XRD) methods. The FTIR result showed that the coconut shells succeeds in becoming carbon. The XRD results confirm the existence of several phases of crystals like graphite around the peaks of 36o and 44o, there are two wide diffraction peaks and can be interconnected with carbon and graphite content. The SEM result showed that the carbonization of pyrolysis and activation processes created porosity and a large surface area for absorption.Keywords: activated carbon, coconut shell, FTIR, SEM, XRD

PROGRAMMABLE SYRINGE PUMP FOR SELECTIVE MICRO DROPLET DEPOSITION Kurniawan, Erry Dwi; Adam, Alwin; Salik, Muhammad Ichlasul; Gareso, Paulus Lobo
Jurnal Elektronika dan Telekomunikasi Vol 19, No 2 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v19.75-82

Micro/nanopatterns with micro deposition techniques have been used in various applications such as flexible electronic devices, biosensing, and biological tissue engineering. For depositing a small size of droplets that can be controlled, structured and patterned precisely is a very important process for microfabrication. In this study, we developed a low cost and simple system for fabricating micro/nanostructure by a selective micro deposition process using a syringe pump. This method is an additive fabrication method where selective droplet materials are released through a needle of the syringe pump. By translating the rotating stepper motor into a linear movement of the lead screw, it will press the plunger of the syringe and give a force to the fluid inside the syringe, hence a droplet can be injected out. The syringe pump system consists of a syringe, the mechanical unit, and the controller unit. A stepper motor, the lead screw, and the mechanical components are used for the mechanical unit. Arduino Uno microcontroller is used as the controller unit and can be programmed by the computer through GUI (Graphical User Interface). The input parameters, such as the push or pull of flow direction, flow rate, the droplet volume, and syringe size dimension can be inputted by the user as their desired value via keypad or the computer. The measurement results show that the syringe pump has characteristics: the maximum average error value of the measured volume is 2.5% and the maximum average error value of the measured flow rate is 14%. The benefits of a syringe pump for micro deposition can overcome photolithography weaknesses, which require an etching and stencil process in the manufacture of semiconductors. Combining two or more syringes into one system with different droplet materials can be used as a promising method for 3D microfabrication in the future.

CHARACTERIZATION OF ACTIVE CARBON FROM COCONUT SHELL USING X-RAY DIFFRACTION (X-RD) AND SEM-EDX TECHNIQUES Bakti, Andi Ikhtiar; Gareso, Paulus Lobo; Rauf, Nurlaela
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 2 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n2.p115-122

Activated carbon is produced from the coconut shell through physical and chemical activation. The pyrolysis method was employed in this research for physical activation at an optimum temperature of 600oC and 1,000oC, for chemical activation immersed using 10% Na2CO3 activating agent. This research has produced two samples, namely the physical activation of 1,000oC and the physics-chemical activation of Na2CO3. The X-Ray Diffraction (X-RD) spectrum of activated carbon in the samples 1,000oC and Na2CO3 contained silicate minerals, iron ore and quartz, respectively, and it showed the formation of carbon and graphite structures in the hkl (002) and (100) planes. Through Scherrer?s method, the average size of the Na2CO3 crystals sample is 15.03 nm and the sample crystal sample of 1,000oC is 54.53 nm; the size of the Nano-scale crystals was formed when the temperature increases ? 600° C. The X-RD resulted the percentage of elemental content carbon phase volume fraction (Fv) and impurity (I) in the 1,000oC sample of 75.61%, 24.39% and the Na2CO3 sample of 77.87%, 22.13% . These results indicate that the carbon content in chemical activation is much better than the physics activation. SEM results with magnification of 5,000x, it is very clear the porosity formed of the 10 ?m picture size are 0.8 ?m in Na2CO3 sample and 1.00 ?m in 1,000oC sample.

Characterization of Active Carbon from Coconut Shell using X-Ray Diffraction (X-RD) and SEM-EDX Techniques Bakti, Andi Ikhtiar; Gareso, Paulus Lobo; Rauf, Nurlaela
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 2 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n2.p115-122

Activated carbon is produced from the coconut shell through physical and chemical activation. The pyrolysis method was employed in this research for physical activation at an optimum temperature of 600oC and 1,000oC, for chemical activation immersed using 10% Na2CO3 activating agent. This research has produced two samples, namely the physical activation of 1,000oC and the physics-chemical activation of Na2CO3. The X-Ray Diffraction (X-RD) spectrum of activated carbon in the samples 1,000oC and Na2CO3 contained silicate minerals, iron ore and quartz, respectively, and it showed the formation of carbon and graphite structures in the hkl (002) and (100) planes. Through Scherrerâ€™s method, the average size of the Na2CO3 crystals sample is 15.03 nm and the sample crystal sample of 1,000oC is 54.53 nm; the size of the Nano-scale crystals was formed when the temperature increases â‰¥ 600Â° C. The X-RD resulted the percentage of elemental content carbon phase volume fraction (Fv) and impurity (I) in the 1,000oC sample of 75.61%, 24.39% and the Na2CO3 sample of 77.87%, 22.13% . These results indicate that the carbon content in chemical activation is much better than the physics activation. SEM results with magnification of 5,000x, it is very clear the porosity formed of the 10 Î¼m picture size are 0.8 Î¼m in Na2CO3 sample and 1.00 Î¼m in 1,000oC sample.

Characterization of Active Carbon Prepared from Coconuts Shells using FTIR, XRD and SEM Techniques Andi Ikhtiar Bakti; Paulus Lobo Gareso
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 7, No 1 (2018): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Activated carbon is produced from coconut shells through physical and chemical activation. With pyrolysis method, the optimum activation temperature for physics activation is 600oC, and for chemical, activation is to soak it in activator ZnCl2 10% and Na2Ca3 10%. Activated carbon was analyzed by Fourier Transformation Infrared (FTIR) and X-ray Diffraction (XRD) methods. The FTIR result showed that the coconut shells succeeds in becoming carbon. The XRD results confirm the existence of several phases of crystals like graphite around the peaks of 36o and 44o, there are two wide diffraction peaks and can be interconnected with carbon and graphite content. The SEM result showed that the carbonization of pyrolysis and activation processes created porosity and a large surface area for absorption

Characterization of Active Carbon from Coconut Shell using X-Ray Diffraction (X-RD) and SEM-EDX Techniques Andi Ikhtiar Bakti; Paulus Lobo Gareso; Nurlaela Rauf
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 8 No. 2 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n2.p115-122

Activated carbon is produced from the coconut shell through physical and chemical activation. The pyrolysis method was employed in this research for physical activation at an optimum temperature of 600oC and 1,000oC, for chemical activation immersed using 10% Na2CO3 activating agent. This research has produced two samples, namely the physical activation of 1,000oC and the physics-chemical activation of Na2CO3. The X-Ray Diffraction (X-RD) spectrum of activated carbon in the samples 1,000oC and Na2CO3 contained silicate minerals, iron ore and quartz, respectively, and it showed the formation of carbon and graphite structures in the hkl (002) and (100) planes. Through Scherrers method, the average size of the Na2CO3 crystals sample is 15.03 nm and the sample crystal sample of 1,000oC is 54.53 nm; the size of the Nano-scale crystals was formed when the temperature increases â‰¥ 600° C. The X-RD resulted the percentage of elemental content carbon phase volume fraction (Fv) and impurity (I) in the 1,000oC sample of 75.61%, 24.39% and the Na2CO3 sample of 77.87%, 22.13% . These results indicate that the carbon content in chemical activation is much better than the physics activation. SEM results with magnification of 5,000x, it is very clear the porosity formed of the 10 Î¼m picture size are 0.8 Î¼m in Na2CO3 sample and 1.00 Î¼m in 1,000oC sample.

Pembuatan Prototipe Dye Sensitized Solar Cell (DSSC) Menggunakan Antosianin Dari Dye Bunga Kenikir (Cosmos Caudatus L.) dan Bunga Zinnia ( Zinnia Peruviana) Eunike Dwioknain; Hardianti Hardianti; Dahlang Tahir; Paulus Lobo Gareso
Jurnal Fisika FLUX Vol 16, No 1 (2019): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Prototype dye sensitized solar sel (DSSC) menggunakan antosianin dari bunga Kenikir (Cosmos Cudatus L.) dan bunga Zinnia (Zinnia Peruviana) untuk pertama kalinya telah di fabrikasi. Prototype DSSC dibuat dalam bentuk struktur sandwich, dengan menggunakan metode spin coating untuk deposisi lapisan TiO2., Kemudian dikarakterisasi menggunakan XRD yang menunjukkan Kristal TiO2 berada pada fase anatase, dengan ukuran Kristal sebesar 37,99 nm menggunakan persamaan Debye Scherrer dan 30,10 nm menggunakan metode UDM. Hasil spektrum UV-Vis dalam rentang 300 nm - 800 nm, memperlihatkan absorbansi masing-masing untuk dye bunga Zinnia, bunga Kenikir, dan dye campuran adalah 331 nm; 328 nm; 327 nm. Hasil FTIR menunjukkan adanya senyawa antosianin pada bahan dye yang ditunjukkan dengan adanya ikatan senyawa flavonol, karboksil dan hikdroksil. Keluaran yang di hasilkan dari prototype DSSC berupa arus dan tegangan yang kemudian di akumulasi untuk menghitung efisiensi DSSC. Efisiensi DSSC sebesar 0,0193 % pada dye bunga Zinnia dengan lama perendaman 66 jam. Efisiensi dari DSSC yang terbaik adalah dye dari bunga Zinnia bila dibandingkan dengan bunga Kenikir dan campuran dye dari bunga Kenikir dan bunga Zinnia.

Pembuatan Prototipe Dye Sensitized Solar Cell (DSSC) Menggunakan Dye Bunga Pacar Air (Impatiens Balsamina L.) dan Bunga Kertas (Bougenville Spectabilis) Hardianti Adam; Eunike Dwioknain; Dahlang Tahir; Paulus Lobo Gareso
Jurnal Fisika FLUX Vol 16, No 2 (2019): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Prototipe dye sensitezed solar cell (DSSC) yang menggunakan dye dari bunga pacar air (Impatiens Balsamina L.) dan bunga kertas (Bougenville Spectabilis) telah difabrikasi dengan struktur sandwich menggunakan pasta TiO2 yang dideposisi pada kaca ITO dengan metode spin coating. Ekstrak dye dimaserasi selama 24 jam dan digunakan untuk perendaman lapisan TiO2 selama 48 jam dan 66 jam. Bubuk dye dan bubuk TiO2 dikarakterisasi menggunakan FTIR, larutan dye menggunakan UV-Vis dan lapisan tipis TiO2 menggunakan XRD. Hasil karakterisasi UV-Vis dan FTIR menunjukkan adanya pigmen antosianin pada bunga pacar air dan pigmen betalain pada bunga kertas serta adanya gugus hidroksil dan karbonil pada hasil FTIR. Hasil karakterisasi XRD menunjukkan fase anatase pada lapisan tipis TiO2 dan ukuran butir 37,99 nm menggunakan persamaan Scherrer, 30,10 nm menggunakan williamson-Hall dengan metode UDM. DSSC yang dibuat mengahasilkan efesiensi tertinggi pada perendaman 66 jam yaitu pada bunga pacar air 0,0022% dan bunga kertas 0,0090%.

Programmable Syringe Pump for Selective Micro Droplet Deposition Erry Dwi Kurniawan; Alwin Adam; Muhammad Ichlasul Salik; Paulus Lobo Gareso
Jurnal Elektronika dan Telekomunikasi Vol 19, No 2 (2019)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v19.75-82

Micro/nanopatterns with micro deposition techniques have been used in various applications such as flexible electronic devices, biosensing, and biological tissue engineering. For depositing a small size of droplets that can be controlled, structured and patterned precisely is a very important process for microfabrication. In this study, we developed a low cost and simple system for fabricating micro/nanostructure by a selective micro deposition process using a syringe pump. This method is an additive fabrication method where selective droplet materials are released through a needle of the syringe pump. By translating the rotating stepper motor into a linear movement of the lead screw, it will press the plunger of the syringe and give a force to the fluid inside the syringe, hence a droplet can be injected out. The syringe pump system consists of a syringe, the mechanical unit, and the controller unit. A stepper motor, the lead screw, and the mechanical components are used for the mechanical unit. Arduino Uno microcontroller is used as the controller unit and can be programmed by the computer through GUI (Graphical User Interface). The input parameters, such as the push or pull of flow direction, flow rate, the droplet volume, and syringe size dimension can be inputted by the user as their desired value via keypad or the computer. The measurement results show that the syringe pump has characteristics: the maximum average error value of the measured volume is 2.5% and the maximum average error value of the measured flow rate is 14%. The benefits of a syringe pump for micro deposition can overcome photolithography weaknesses, which require an etching and stencil process in the manufacture of semiconductors. Combining two or more syringes into one system with different droplet materials can be used as a promising method for 3D microfabrication in the future.

Characterization of Active Carbon Prepared from Coconuts Shells using FTIR, XRD and SEM Techniques Andi Ikhtiar Bakti; Paulus Lobo Gareso
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 7, No 1 (2018): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v7i1.2459

Activated carbon is produced from coconut shells through physical and chemical activation. With pyrolysis method, the optimum activation temperature for physics activation is 600oC, and for chemical, activation is to soak it in activator ZnCl2 10% and Na2Ca3 10%. Activated carbon was analyzed by Fourier Transformation Infrared (FTIR) and X-ray Diffraction (XRD) methods. The FTIR result showed that the coconut shells succeeds in becoming carbon. The XRD results confirm the existence of several phases of crystals like graphite around the peaks of 36o and 44o, there are two wide diffraction peaks and can be interconnected with carbon and graphite content. The SEM result showed that the carbonization of pyrolysis and activation processes created porosity and a large surface area for absorption

Title

Found 10 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 10 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 10 Documents
Search