Výsledky vyhledávání - "Yuyun Irmawati"

Akademický článek

Correlation of Nano Titanium Dioxide Synthesis and the Mineralogical Characterization of Ilmenite Ore as Raw Material

Autor: Yayat Iman Supriyatna, Widi Astuti, Slamet Sumardi, Sudibyo, Agus Prasetya, Lavita Indriyani Ginting, Yuyun Irmawati, Nining Sumawati Asri, Himawan Tri Bayu Murti Petrus

Publikováno v: International Journal of Technology, Vol 12, Iss 4, Pp 749-759 (2021)

A study on mineral characterization and nano titanium dioxide synthesis from ilmenite ore of Bangka Island, Indonesia, has been carried out using a caustic fusion method and hydrochloric acid leaching. Comprehensive mineral characterization was co

Externí odkaz: https://doaj.org/article/b6bced0ac40a457891efe76a76a9abd3

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Akademický článek

Iron-Decorated Nitrogen/Boron co-Doped Reduced Graphene Oxide Aerogel for Neutral Rechargeable Zn-Air Batteries

Autor: Yuyun Irmawati, Falihah Balqis, Pilar Bela Persada, Fredina Destyorini, Rike Yudianti, Ferry Iskandar, Afriyanti Sumboja

Publikováno v: Batteries, Vol 9, Iss 7, p 356 (2023)

Zn-air batteries (ZABs) with neutral electrolytes offer a significantly longer lifespan and better recyclability than alkaline ones. However, low-performance bifunctional catalytic activities for oxygen reduction or evolution reaction (i.e., ORR/OER)

Externí odkaz: https://doaj.org/article/cfef3f2ee5e944d5af3a4f7ab7a3c312

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Akademický článek

Formation of nanostructured graphitic carbon from coconut waste via low-temperature catalytic graphitisation

Autor: Fredina Destyorini, Yuyun Irmawati, Andri Hardiansyah, Henry Widodo, Ilham Nur Dimas Yahya, Nanik Indayaningsih, Rike Yudianti, Yu-I Hsu, Hiroshi Uyama

Publikováno v: Engineering Science and Technology, an International Journal, Vol 24, Iss 2, Pp 514-523 (2021)

We report a simple and relatively low-temperature method for producing graphitic carbon from renewable and abundant coconut coir. This study also aims to promote the utilisation and conversion of locally sourced coconut coir waste into value-added ma

Externí odkaz: https://doaj.org/article/b2a49e61673545bea5f99fc354ee4ca1

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Akademický článek

Dispersibility of Multiwall Carbon Nanotube in a Polyanionic Surfactant Based on UV-Vis Analysis

Autor: Yuyun Irmawati, Deni Shidqi Khaerudini, Indriyati Indriyati, Mardiyati Mardiyati, Rike Yudianti

Publikováno v: Indonesian Journal of Chemistry, Vol 20, Iss 5, Pp 1206-1212 (2020)

The degree of carbon nanotube (CNT) dispersion in an ink solution plays a critical role in the performance of CNT based devices. This is a challenging task in the CNT utilization due to strong van der Waals interaction affecting the CNT bundles. A go

Externí odkaz: https://doaj.org/article/777c96f05acd43a38b8a64f08e4b18f1

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Akademický článek

Magnetic Graphene-Based Sheets for Bacteria Capture and Destruction Using a High-Frequency Magnetic Field

Autor: Andri Hardiansyah, Ming-Chien Yang, Hung-Liang Liao, Yu-Wei Cheng, Fredina Destyorini, Yuyun Irmawati, Chi-Ming Liu, Ming-Chi Yung, Chuan-Chih Hsu, Ting-Yu Liu

Publikováno v: Nanomaterials, Vol 10, Iss 4, p 674 (2020)

Magnetic reduced graphene oxide (MRGO) sheets were prepared by embedding Fe3O4 nanoparticles on polyvinylpyrrolidone (PVP) and poly(diallyldimethylammonium chloride) (PDDA)-modified graphene oxide (GO) sheets for bacteria capture and destruction unde

Externí odkaz: https://doaj.org/article/1c4858ea63074bbda6d9a336f3c841d4

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