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Recent Progress of ZnO-Based Nanoparticle: Synthesizing Methods of Various Dopant and Applications Nurlaela rauf
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.16044

This review focus on the effect of doping rare earth metals, transition metals, noble metals, poor metals, and non-metals on ZnO nanoparticles. ZnO is a semiconductor material with an average wide energy band gap of 3.2 eV. The doping is used to improve the properties of ZnO which strongly depend on their application. The concentration of doping, the type of doping and the process using sol-gel, hydrothermal and precipitation methods are affected in modifying the ZnO lattice parameters. The transition metal widely used for photocatalysts and sensors. The doped application of ZnO nanoparticles as a semiconductor material has proven advantageous in enabling various photocatalytic, glucose biosensors, VOC detection sensors, antibacterial, biomedical, and optoelectronic spintronic, LED, NLO, and silicon solar cells. This review provided information for scientist in choosing the synthesizing methods of ZnO with desired properties and application in future.

Utilization of Areca Nut Fibers (areca catechu l.) and Polyvinyl Chloride (PVC) as A Sound Absorbing Material Nurul, Nurul Mutaharah; Rauf, Nurlaela
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.27-32

Noise refers to unwanted sounds emanating from production equipment or work equipment, which are potentially harmful. The most common factor affecting workers is noise, which can impair hearing. The impact can be both psychological and biological problems. To solve this problem, noise-absorbing materials that can be installed in various places are needed. One of the proposed solutions is the development of acoustic materials made from easily available natural fiber composites, such as areca nut fibers. Areca fibers are integrated as a base material for acoustic materials that aim to reduce outdoor noise or from building structures. In this study, 2 testing methods were carried out, namely the Sound Absorption Coefficient (α) Test and the Fourier Transform Infrared (FTIR) Test. The Sound Absorption Coefficient Test aims to measure the ability of materials to absorb sound energy, while FTIR is used to analyze sample components without damaging them. The sound absorption coefficient test results showed that the samples were able to absorb sound at a frequency of 800-1600 Hz. After the areca fiber was treated with NaOH, there was a change in the O-H group which indicated a reduction in lignin content in the areca fiber. This O-H group shift causes an increase in adhesion between the matrix and filler in the composite.

Sintesis Hidroksiapatit Berbahan Tulang Ikan Layar (Istiophorus Platypterus) Menggunakan Metode Presipitasi Al-Qarny, Uwais; Rauf, Nurlaela
JFT : Jurnal Fisika dan Terapannya Vol 11 No 2 (2024): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i2.50008

Sailfish bone is one of the marine biological wastes that has potential as a source of hydroxyapatite for biomedical applications. This study aims to synthesize hydroxyapatite made from sailfish bone through precipitation method with the effect of variation in calcium precursor mass and phosphate precursor concentration. Sailfish bones were calcined at 900ºC for 3 hours, then reacted with (NH4)2HPO4. The solution was adjusted to pH 8 using NaOH, precipitated for 24 hours at room temperature to produce a homogeneous precipitate, washed with aquades, and filtered. The precipitate was then dried at 100ºC for 2 hours to produce hydroxyapatite. FTIR characterization showed the presence of PO43-, OH-, and CO32- groups in all three samples. Sample C has higher absorption intensity of PO43- and OH- groups than the other two samples. The higher absorption intensity indicates more content of PO43- and OH- groups. XRD analysis showed that the three samples had dominant hydroxyapatite phase. In addition to the hydroxyapatite phase, there is also A-type carbonate apatite phase and B-type carbonate apatite phase. Sample C has the largest average crystal size, which is 28.94 nm.

Pengukuran Koefisien Absorpsi Bunyi Material Akustik Jerami Padi (Oryza Sativa L.) sebagai Peredam Kebisingan Nurhasna, Yuni Bandhaso; Rauf, Nurlaela
Jurnal Pendidikan Fisika dan Sains Vol 7 No 02 (2024): GRAVITASI: JURNAL PENDIDIKAN FISIKA DAN SAINS
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/gravitasi.jpfs.v7i02.10515

Penelitian ini menentukan nilai koefisien absorpsi bunyi dari material akustik jerami padi sebagai peredam kebisingan menggunakan metode tabung impedansi dua mikrofon berdasarkan standar ISO 10534-2:1998. Material akustik dibuat dari jerami padi dengan perekat resin polyester. Telah digunakan dua variabel uji pada penelitian ini yaitu, variasi komposisi yang terdiri dari tiga sampel dan variasi ketebalan juga terdiri dari tiga sampel. Variasi komposisi dilakukan untuk mengevaluasi kemampuan jerami padi sebagai penyerap bunyi, sementara variasi ketebalan digunakan untuk mengetahui pengaruh ketebalan terhadap koefisien absorpsi bunyi pada material akustik jerami padi. Seluruh sampel uji mendapatkan nilai koefisien absorpsi tertinggi pada frekuensi 1600 Hz. Material akustik pada variasi komposisi mendapatkan nilai koefisien absorpsi tertinggi berturut-turut sebesar 0,30, 0,34 dan 0,37. Variasi ketebalan mendapatkan nilai koefisien absorpsi tertinggi secara berturut-turut sebesar 0,73, 0,79 dan 0,93. Nilai koefisien absorpsi bunyi yang didapatkan telah memenuhi standar yang ditentukan oleh International Standardization Organization (ISO) 11654.

A PENGARUH BUDAYA ORGANISASI DAN KOMITMEN TERHADAP KEPUASAN DAN KINERJA PEGAWAI DPMPTSP KABUPATEN LUWU TIMUR alfatih, isanawati; Ridjal, Syamsul; Rauf, Nurlaela
Movere Journal Vol. 5 No. 02 (2023)
Publisher : Sekolah Tinggi Ilmu Ekonomi (STIE) Tri Dharma Nusantara Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53654/mv.v5i02.359

Jenis penelitian kuantitatif yang bertujuan untuk mengetahui dan menganalisis pengaruh budaya organisasi dan komitmen terhadap kepuasan dan kinerja pegawai di Dinas Penanaman Modal dan Pelayanan Perizinan Terpadu Satu Pintu Kabupaten Luwu Timur. Populasi dan sampel penelitian ini adalah seluruh pegawai di Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kabupaten Luwu Timur yang berjumlah 41 orang sekaligus menjadi sampel dalam penelitian.Teknik analisis data menggunakan analisis jalur (path analysis).Hasil penelitian ini menunjukkan bahwa budaya organisasi berpengaruh positif terhadap kepuasan kerja di Dinas Penanaman Modal Satu Pintu di Kabupaten Luwu Timur. Komitmen organisasi berpengaruh positif terhadap kepuasan kerja di Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kabupaten Luwu Timur. Budaya organisasi berpengaruh positif terhadap kinerja pegawai di Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kabupaten Luwu Timur. Komitmen organisasi berpengaruh positif terhadap kinerja pegawai di Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kabupaten Luwu Timur. Kepuasan kerja berpengaruh positif terhadap kinerja pegawai di Dinas Penanaman Modal dan Pelayanan Terpadu Satu Pintu Kabupaten Luwu Timur.

Utilization of Areca Nut Fibers (areca catechu l.) and Polyvinyl Chloride (PVC) as A Sound Absorbing Material Nurul, Nurul Mutaharah; Rauf, Nurlaela
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.27-32

Noise refers to unwanted sounds emanating from production equipment or work equipment, which are potentially harmful. The most common factor affecting workers is noise, which can impair hearing. The impact can be both psychological and biological problems. To solve this problem, noise-absorbing materials that can be installed in various places are needed. One of the proposed solutions is the development of acoustic materials made from easily available natural fiber composites, such as areca nut fibers. Areca fibers are integrated as a base material for acoustic materials that aim to reduce outdoor noise or from building structures. In this study, 2 testing methods were carried out, namely the Sound Absorption Coefficient (α) Test and the Fourier Transform Infrared (FTIR) Test. The Sound Absorption Coefficient Test aims to measure the ability of materials to absorb sound energy, while FTIR is used to analyze sample components without damaging them. The sound absorption coefficient test results showed that the samples were able to absorb sound at a frequency of 800-1600 Hz. After the areca fiber was treated with NaOH, there was a change in the O-H group which indicated a reduction in lignin content in the areca fiber. This O-H group shift causes an increase in adhesion between the matrix and filler in the composite.

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