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N-Doped rGO-Like Carbon Prepared from Coconut Shell:Structure and Specific Capacitance

Journal of Renewable Materials 2023年第4期11卷 1823-1833页

作者： Imam Khambali Budhi Priyanto Retno Asih Malik Anjelh Baqiya Muhammad Mahyiddin Ramli Nurul Huda Osman sa.a.ut tunmee Hideki Nakajima Triwikantoro Mochamad Zainuri Darminto Department of Physics Faculty of Science and Data AnalyticsInstitut Teknologi Sepuluh NopemberSurabaya60111Indonesia Department of Electrical Engineering Faculty of EngineeringUniversity of Muhammadiyah MalangMalang65144Indonesia Geopolymer&Green Technology Centre of Excellence Universiti Malaysia PerlisArauPerlis02600Malaysia Applied Electromagnetic Laboratory 1 Department of PhysicsFaculty of ScienceUniversiti Putra MalaysiaSelangor43400Malaysia Synchrotron Light Research Institute(SLRI) Nakhon Ratchasima3000Thailand

An rGO−like carbon compound has been synthesized from biomass,i.e.,old coconut shell,by a carbonization process followed by heating at 400°C for 5 *** nitrogen doping was achieved by adding the urea(CH4N2O)and stirring at 70°C for 14 *** morphology and structure of the rGO-like carbon were investigated by electron microscopies and Raman *** presence of C-N functional groups was analyzed by Fourier transform infrared and synchrotron X-ray photoemission spectroscopy,while the particle and the specific capacitance were measured by particle sizer and cyclic *** highest specific capacitance of 72.78 F/g is achieved by the sample with 20%urea,having the smallest particles size and the largest surface *** corresponding sample has shown to be constituted by the appropriate amount of C–N pyrrolic and pyridinic defects.

关键词： N-doped rGO−like carbon coconut shell specific capacitance

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Hydrogenated Amorphous Carbon Films from Palmyra Sugar

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Journal of Renewable Materials 2021年第6期9卷 1087-1098页

作者： Budhi Priyanto Retno Asih Irma Septi Ardiani Anna Zakiyatul Laila Khoirotun Nadiyyah Bima Romadhon sa.a.ut tunmee Hideki Nakajima Triwikantoro Yoyok Cahyono Darminto Department of Physics Faculty of Science and Data AnalyticsInstitut Teknologi Sepuluh NopemberKampus ITS SukoliloSurabaya60111Indonesia Departement of Electronic Engineering Faculty of EngineeringUniversitas Muhammadiyah MalangMalangIndonesia Departement of Electronic Engineering Faculty of Industrial TechnologyInstitut Teknologi Nasional MalangMalangIndonesia Synchrotron Light Research Institute Nakhon Ratchasima3000Thailand

A simple,highly reproducible,and environmentally friendly method is a considered approach in generating renewable energy ***,hydrogenated amorphous carbon(a-C)films have been successfully prepared from palmyra liquid sugar,employing spin-coating and spraying *** with the former method,the latter shows a significance in producing a better homogeneity in particle size and film *** obtained films have a thickness of approximately 1000 to 100 nm and contain an sp^(2) hexagonal structure(~70%)and sp^(3) tetrahedral configuration(~30%)of *** introduction of boron(B)and nitrogen(N)as dopants has created the local structural modification of bonding,inducing a slight change of electrical conductivity,electronic energy bandgap,and optical transparency near-infrared *** obtained α-C film features a“green”semiconducting material.

关键词： Thin film palmyra sugar amorphous carbon boron nitrogen

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