• 文献标题:   Engineering tunable conductivity, p-n junction and light-harvesting semi-conductivity of graphene oxide by fixing reduction mood only
  • 文献类型:   Article
  • 作  者:   KARIM MR, UDDIN MN, SHAIKH MA, RAHAMAN MS, SIDDIQUEY IA, ARAFATH MA, ISLAM MS, HAYAMI S, ALAMRY KA, ASIRI AM, RAHMAN MM
  • 作者关键词:   reduced graphene oxide, ndoping, tunable conductivity, pn junction, light harvesting bandgap, photocatalysi
  • 出版物名称:   JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
  • ISSN:   1876-1070 EI 1876-1089
  • 通讯作者地址:  
  • 被引频次:   3
  • DOI:   10.1016/j.jtice.2021.03.019 EA APR 2021
  • 出版年:   2021

▎ 摘  要

Modulated electron conductivity (EC), p-n junction behavior and light-harvesting semiconductivity in reduced graphene oxide (rGO) is observed. Pristine graphene oxide (GO) film on borosilicate glass was reduced by ascorbic acid (AA), Glucose (GC), hydrogen iodide (HI), thiourea (TU), hydrazine solution (HS) and hydrazine vapor (HV) to obtain respective rGOAA, rGOGC, rGOHI, rGOTU, rGOHS and rGOHV films. The morphologies of the films were studied by SEM image and PXRD spectra. The functional groups were studied by IR, Raman and XPS spectra. Except rGOHV, the samples exhibited tunable electron conduction behavior (EC) following the trend as rGOHS (1.1 ? 10-1 mA/V) > rGOTU (4.4 ? 10-3 mA/V) > rGOGC (1.5 ? 10-3 mA/V) > rGOHI (8.9 ? 10-4 mA/V) > rGOAA (2.6 ? 10-4 mA/V). However, rGOHV exhibited p-n junction behavior with the knee point at 0.66 and -0.62 V for the forward and reverse bias, respectively. rGOHS and rGOHV could exhibit photocatalytic activity due to the presence of doped N. The water-splitting efficiency of rGOHS and rGOHV are 2.38 and 3.75 mmol/hg, respectively, whereas respective dye degradation efficiencies are 84.16 and 92.48%. TGA data confirms that rGOHV sustains with some water adsorbing capacity that can aid the hydrodynamics. Further, the hydrodynamics within rGO film was confirmed from hydronium ion conductivity. (c)& nbsp;2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.