Garuda - Garba Rujukan Digital

p-Index From 2019 - 2024

1.642

P-Index

This Author published in this journals

All Journal Jurnal Sains dan Seni ITS IPTEK Journal of Proceedings Series Alchemy : Journal of Chemistry Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Chemistry Akta Kimia Indonesia Indonesian Journal of Chemical Analysis (IJCA) Sewagati Bulletin of Chemical Reaction Engineering & Catalysis

Yatim Lailun Ni’mah

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Institut Teknologi Sepuluh Nopember, Keputih, Sukolilo, Surabaya 60111, Indonesia

Author-ID : 3960109

Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences

Published : 16 Documents Claim Missing Document

Claim Missing Document

Articles

1 2

Determination of Shelf Life with Accelerated Shelf Life Testing (ASLT) in Beverage Seaweed Niâ€™mah, Yatim Lailun; Suprapto, Suprapto; Ilmi, Moh. Mualliful; Agustin, Nuril Indah; Ameswari, Vennycha Dwi
IPTEK Journal of Proceedings Series No 1 (2018): 3rd International Seminar on Science and Technology (ISST) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2018i1.3533

In this research has been made beverage seaweed from main ingredient of red seaweed type Eucheuma cottonii with added other food ingredients that serve to improve the taste. In addition to labeling and commercially produced, it is necessary to determine the shelf life in seaweed beverage. Determination of shelf life of beverage seaweed was done by Accelerated Shelf Life Testing (ASLT) method. Beverage seaweed studied there are two flavors of original taste and green tea. Based on parameters of pH value, shelf life of original taste is 17 days and the taste of green tea is 34 days. The result is for storage at room temperature 30 Â°C

Studi Konduktivitas Solid Polymer Electrolyte (SPE) PEO (Poly Ethylene Oxide) dengan Fly ash dari PT. TJIWI KIMIA Sidoarjo Arlita Sandya Satya Wardhani; Yatim Lailun Ni'mah; Harmami Harmami
Jurnal Sains dan Seni ITS Vol 6, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

Pengaruh penambahan abu layang pada Solid Polymer Electrolyte (SPE) PEO (Poly Ethylene Oxide) dan garam LiClO4 (Lithium Perchlorate) telah diteliti. Kristalinitas PEO berkurang secara signifikan karena penggabungan PEO-LiClO4-abu layang, yang diuji menggunakan X-Ray Diffraction (XRD). Interaksi ion-polimer, khususnya interaksi antara kation LiClO4-abu layang dengan atom eter oksigen dari PEO, telah dibuktikan dengan FTIR. Penambahan abu layang 5% meningkatkan nilai konduktivitas ionik SPE yaitu 1,730 x 10-4 S/cm pada suhu 60 oC. Sedangkan nilai konduktivitas ionik PEO murni sebesar 7,859 x 10-6 S/cm dan 6,863 x 10-5 S/cm untuk PEO-LiClO4 pada suhu yang sama. Hasil dalam penelitian ini menunjukkan bahwa SPE PEO dengan penambahan LiClO4 dan abu layang merupakan salah satu material elektrolit untuk baterai ion lithium.

Effect of CTAB Ratio to the Characters of Mesoporous Silica Prepared from Rice Husk Ash in the Pyrolysis of a–cellulose Nia Meisa Wulandari; Lisna Efiyanti; Wega Trisunaryanti; Haryo Satriya Oktaviano; Syaiful Bahri; Yatim Lailun Ni’mah; Savitri Larasati
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.3.10828.632-640

Due to its wide application, synthesizing silica through a cost-effective process becomes an attractive subject to be studied today. In this work, mesoporous silica (MS) was prepared from the highly available agricultural waste, rice husk ash (RHA), to be used as catalyst in the pyrolysis of a-cellulose. Silica was extracted from RHA through a reflux process in a strong base solution and arranged into a mesoporous structure by using cetyltrimethylammonium bromide (CTAB). To find a condition that produces a mesoporous support with the highest surface area and catalytic activity, the mole ratios of CTAB:SiO2 used during the preparation of MS were varied; 0.05:1; 0.1:1; 0.2:1. Afterwards, all prepared MS were characterized using Fourier Transform Infra Red (FTIR), Scanning Electron Microscope (SEM), and Surface Area Analyzer (SAA). Through he surface area analysis, it was found that MS materials possessed surface area, pore diameter, and pore volume that range from 600–970 m2.g−1, 3.5–4.7 nm, 0.7–1 cm3.g−1, respectively. The highest surface area, with over 970.80 m2.g−1, was obtained in MS support prepared by using CTAB:SiO2 mole ratio of 0.1:1. SEM images showed a coral reef-like surface morphology for all MS. In the pyrolysis of a-cellulose evaluated by Py-GCMS, aside from producing biofuel compounds, the use of MS was able to generate two-fold furan production, which is considered as a valuable compound in many chemical syntheses. This result highlights the potential of MS prepared from RHA to be used as a catalysis support material that is more economical for biofuel and other chemical production. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

ZnO-Activated Carbon Blended as a Catalyst for Oxidative Desulfurization of Dibenzothiophene Wega Trisunaryanti; Satriyo Dibyo Sumbogo; Safa Annissa Novianti; Dyah Ayu Fatmawati; Maria Ulfa; Yatim Lailun Nikmah
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.11797.881-887

The problem of sulfur content in heavy oil is a challenge for researchers to meet the needs of environmentally friendly fuels. The catalyst preparation plays an important role in the desulfurization process. The synthesis of ZnO-activated carbon as a catalyst and its activity in oxidative desulfurization (ODS) reaction has been successfully carried out. In this work, the ZnO and activated carbon (AC) were blended by a solid-solid reaction. The ZnO, AC, and ZnO-AC were then characterized using acidity test with pyridine vapor adsorption, Fourier Transform Infra-Red (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and Surface Area Analyzer (SAA). ODS of dibenzothiophene (DBT) reaction was performed by using H2O2 under variation of the reaction time (30, 60, 120, and 150 min) for the ZnO-AC catalyst. The efficiency of ODS-DBT was analyzed by a UV-Visible spectrophotometer. The XRD analysis result showed that ZnO-AC blended displays new crystal peaks of Zn in the AC diffractogram. The surface area (734.351 m2/g) and acidity (4.8780 mmol/g) of ZnO-AC were higher than ZnO and AC themselves. ZnO-AC produced the highest efficiency of ODS-DBT which was 93.83% in the reaction time of 120 min. Therefore, the simple procedure of this physical blending was proved effective to homogenize between ZnO and AC into ZnO-AC so that it has good physicochemical properties as an ODS-DBT catalyst. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Synthesis of Titanium Dioxide Nanoparticles (3nm) by adding PEO Yatim Lailun Ni'mah
Akta Kimia Indonesia Vol 2, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Nanosized Titanium dioxide (TiO) powder was synthesized via hydrothermal method using titanium tetrachlorida (TiCl4) as the precursor and add PEO (Mw = 600.000). The as prepared nano powder was used for further characterization. The phase transformation was investigated by an X-ray diffractometer (XRD). The grain size of the TiO2 particle was found to be 3.4 nm. Experimental results have shown that the as-prepared powders have entirely consisted with anatase crystalline phase.

SYNTHESIS AND CHARACTERIZATION OF HDPE PLASTIC FILM FOR HERBICIDE CONTAINER USING FLY ASH CLASS F AS FILLER Yatim Lailun Ni’mah; Lukman Atmaja; Hendro Juwono
Indonesian Journal of Chemistry Vol 9, No 3 (2009)
Publisher : Universitas Gadjah Mada

High Density Polyethylene (HDPE) plastic plays an important role in various applications, for example, it can be used as a container (bottle). Petrokimia Kayaku Company, a branch of Petrokimia Company of Gresik, produces herbicides using HDPE plastic bottles as their container. Those plastic bottles undergo degradation (kempot) for certain period of time. The aim of this research is to characterize and to synthesize the HDPE plastic film with class F fly ash as filler. The results expected from this research are producing the plastic with a better properties and durability. This research was initiated by taking the sample of HDPE plastic bottle and herbicides (containing Gramakuat, on active material parakuat dichloride) at Petrokimia Kayaku Company. Both the initial HDPE and the degraded bottles was analyzed their tensile strength and Fourier Transform-Infra Red (FTIR) spectral. The next step was to synthesize the HDPE plastic film using class F fly ash as filler and a coupling agent. The filler concentrations were 0%, 5%, 10%, 15%, and 20wt %. The best result was 5% filler concentration with tensile strength of 27.7 lbs. This HDPE film was then subjected to degradation test using pyridine solution with various concentrations (1%, 3% and 5%) for two weeks, thermal degradation at 100 °C for two weeks and chemical resistance by xylene with soak time variation of 24 h, 98 h and 168 h. The result of degradations test show that the value of tensile strength was decreased with the increase of filler consentration. The chemical resistance, however, was increased.

Improvement of Cycling Performance of Na2/3Co2/3Mn1/3O2 Cathode by PEDOT/PSS Surface Coating for Na Ion Batteries Yatim Lailun Ni’mah; Ju Hsiang Cheng; Ming Yao Cheng; Wei Nien Su; Bing Joe Hwang
Indonesian Journal of Chemistry Vol 18, No 1 (2018)
Publisher : Universitas Gadjah Mada

The surface-modified Na2/3Co2/3Mn1/3O2 is coated with a conductive Poly (3,4-Ethylene dioxy thiophene)-poly (styrene sulfonate) (PEDOT/PSS) polymer, and their resulting electrochemical properties were investigated as Na-ion battery cathode. The surface-modified Na2/3Co2/3Mn1/3O2 cathode material exhibits a high discharge capacity and good rate capability due to enhanced electron transport by surface PEDOT/PSS. The presence of PEDOT/PSS surface layer suppresses the growth of a resistive layer, while the dissolution of transition metals of the active cathode materials is inhibited as well. The resulting surface-modified Na2/3Co2/3Mn1/3O2 shows superior cycling performance, which is much stable than the pristine one as being the Na-ion battery cathode.

Extraction of Alumina from Red Mud for Synthesis of Mesoporous Alumina by Adding CTABr as Mesoporous Directing Agent Eka Putra Ramdhani; Tri Wahyuni; Yatim Lailun Ni’mah; Suprapto Suprapto; Didik Prasetyoko
Indonesian Journal of Chemistry Vol 18, No 2 (2018)
Publisher : Universitas Gadjah Mada

Mines in Bintan were producing bauxite for many years. The production process of bauxite to alumina produced much red mud. From X-ray Fluorescence (XRF), alumina content on Bintan’s red mud was 28.87 wt.%. This research was studying on the extraction alumina from red mud with reduction of hematite (Fe2O3) and desilication processes. After extraction process alumina was collected about 52.89 wt.%. Synthesis of mesoporous alumina from red mud using sol-gel method at the room temperature for 72 h with cetyltrimethylammonium bromide (CTABr) as mesoporous directing agent. The CTABr/Al-salt ratio, i.e. 1.57; 4.71 and 7.85 with the sample code of AMC-1, AMC-3, AMC-5, respectively. The product was calcined at 550 °C for 6 h. The synthesized materials were characterized by X-ray Diffraction (XRD), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), transmission electron microscopy (TEM), and N2 adsorption-desorption techniques. XRD pattern of AMC-1, AMC-3, and AMC-5 showed that all synthesized materials have amorphous phase. The morphology were wormhole aggregate that were showed by SEM and TEM characterization. N2 adsorption-desorption characterization showed the distribution of pore size of about 3.2 nm. The highest surface area and pore volume were obtained in solid-solid ratio CTABr/GM-AL by 1.57 (AMC-1) i.e. 241 m2/g and 0.107 cm3/g, respectively.

Synthesis of Amorphous Aluminosilicates from Bintan’s Red Mud as Alumina Source Futri Wulandari; Eka Putra Ramdhani; Yatim Lailun Ni’mah; Ahmad Anwarud Dawam; Didik Prasetyoko
Indonesian Journal of Chemistry Vol 18, No 4 (2018)
Publisher : Universitas Gadjah Mada

Red mud is a generated by-product in alumina production from bauxite ore. In this study, Bintan’s red mud has been used as alumina and silica source to synthesize amorphous mesoporous aluminosilicates material. Alkali fusion method with a NaOH/red mud ratio 0.8; 1.0; 1.2; 1.4 and 1.5 followed by hydrolysis method was used to extract dissolved alumina and silica from red mud. Synthesis of amorphous aluminosilicates by hydrothermal method was conducted at 80 °C for 24 h. Cetyltrimethylammonium bromide (CTABr) was added as the structure directing agent. Aluminosilicate products were characterized using FTIR spectroscopy (Fourier Transform Infra-Red Spectroscopy), XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy), and nitrogen adsorption-desorption. XRD and SEM result shows that the product was amorphous with low uniformity in terms of surface morphology and particle size. Nitrogen adsorption-desorption profile shows that all aluminosilicates products has a meso pore structure, confirmed by the highest pore distribution at 3.05–17.70 nm. The highest surface area and pore volume were obtained in ASM 0.8 (NaOH/red mud ratio = 0.8) i.e. 177.97 m2/g and 1.09 cm3/g, respectively.

Synthesis of Copper Nanoparticles Using Chromolaena odorata (L.) Leaf Extract as A Stabilizing Agent Suprapto Suprapto; Cantika Alda Hafshah Handoyo; Putri Ayu Senja; Veto Barid Ramadhan; Yatim Lailun Ni'mah
Indonesian Journal of Chemical Analysis (IJCA) Vol. 3 No. 1 (2020): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol3.iss1.art2

Co-Authors Abdul Wafi Adityo Pratomo Putro Agustin, Nuril Indah Ahmad Anwarud Dawam Alvida Mustika Rukmi Ameswari, Vennycha Dwi Ananda Krisna Aldianita Anisa Rahma Maharani Ardi Lukman Hakim Arlita Sandya Satya Wardhani Aunurohim Aunurohim Bing Joe Hwang Cantika Alda Hafshah Handoyo Cicilia Puspa Rini Dheva Noveilya Didik Prasetyoko Djarot Sugiarso Dyah Ayu Fatmawati Eka Putra Ramdhani Eka Putra Ramdhani Feraldy A. Putrama Fiqey Indriati Eka Sari Futri Wulandari Harmami Harmami Haryo Satriya Oktaviano Hendro Juwono Hendro Juwono Herdayanto Sulistyo Putro Imelda Priskila Simanjuntak Ita Ulfin Ju Hsiang Cheng Lienggar Rahadiantino Lisna Efiyanti Lukman Atmaja M Daffa Aditya Mardi Santoso Maria Ulfa Ming Yao Cheng Moh. Mualliful Ilmi, Moh. Mualliful Nabilah Dita Anaqah Ni Kadek Githa Kartika Gunadyani Nia Meisa Wulandari Nor Farida Nurul Hidayat Putri Ayu Senja Ruzain Rafie Sukma Putra Safa Annissa Novianti Satriyo Dibyo Sumbogo Savitri Larasati Suprapto - Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto, Suprapto Susi Agustina Wilujeng Susy Budi Astuti SYAIFUL BAHRI Taslim Ersam Tri Wahyuni Vanuella Tresnaning Budi Veto Barid Ramadhan Wega Trisunaryanti Wega Trisunaryanti Wei Nien Su Yaqdhan Nufal Rafi

Title

Found 16 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 16 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 16 Documents
Search