Materials Research Express | VOL. 5

Green synthesis of ZnO hollow microspheres and ZnO/rGO nanocomposite using red rice husk extract and their photocatalytic performance

Publication Date Aug 3, 2018


ZnO hollow microspheres and ZnO hollow microspheres/reduced graphene oxide (ZnO/rGO) nanocomposites were synthesized for the first time by a completely green method based on red rice husk extract as an effective oxidizing agent as well as a chelating agent and water as a solvent. The green ZnO and ZnO/rGO materials were characterized by x-ray diffraction, scanning electron microscope, FTIR spectroscopy, Raman spectroscopy, BET surface area analyzer and TGA. The results showed that the biosynthesized ZnO and ZnO/rGO has a hollow spherical morphology composed of small ZnO particles with the mean particle size of about 15 nm. The Raman and XRD measurements demonstrated that the as-prepared ZnO structures are of wurtzite hexagonal phase with high crystallinity. The synthesized green ZnO microspheres show high photocatalytic activity for the degradation of malachite green dye as a model pollutant. The photoctalytic activity was further increased in the presence of ZnO/rGO nanocomposite evidencing the role of graphene oxide in capturing the photogenerated electrons and decreasing the electron–hole pair recombination.


Degradation Of Malachite Green Dye ZnO Hollow Microspheres Green ZnO Model Pollutant Graphene Oxide High Crystallinity Photocatalytic Performance Hollow ZnO FTIR Spectroscopy Graphene Oxide Nanocomposites

Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.

Climate change Research Articles published between Jan 23, 2023 to Jan 29, 2023

R DiscoveryJan 30, 2023
R DiscoveryArticles Included:  3

Climate change adaptation has shifted from a single-dimension to an integrative approach that aligns with vulnerability and resilience concepts. Adapt...

Read More

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19


Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.