Herein, we report the paddy-straw-derived graphene quantum dots (GQDs)-reinforced vertical-aligned two-dimensional (2D) ZnO nanosheet-based flexible triboelectric nanogenerator (FTNG) for scavenging mechanical energy for the first time. The GQDs (diameter ∼5-7 nm) and ZnO nanosheets were grown using a hydrothermal method and seed-assisted chemical route, respectively. The X-ray diffraction and electron microscopy results confirmed the formation of a hexagonal wurtzite crystal structure and vertical-aligned morphology of 2D ZnO nanosheets. The GQD-reinforced ZnO-nanosheet-based FTNG device generated an output voltage of 40 V and current density of 2 μA/cm, respectively, whereas pristine vertical-aligned ZnO-nanosheet-based device produced an output voltage of only 16 V and a current density of 0.36 μA/cm, respectively. The performance of the GQD-ZnO nanosheet FTNG device was also measured under illumination of the UV light, and a drastic increase in the output voltage is observed as compared to a pristine ZnO-nanosheet-based device. The GQD-reinforced ZnO nanosheets exhibited very high dielectric constant of 40 at low frequency side. The current finding suggested a novel approach to efficiently harvest mechanical energy and a novel method to fabricate the self-powered UV sensors and tribotronics devices using agrowaste-derived GQDs and ZnO nanosheets.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acsami.3c02036 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
In situ visualization of interfacial processes at nanoscale in non-alkaline Zn-air batteries.
Nat Commun
December 2024
Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
Zn-air batteries (ZABs) present high energy density and high safety but suffer from low oxygen reaction reversibility and dendrite growth at Zn electrode in alkaline electrolytes. Non-alkaline electrolytes have been considered recently for improving the interfacial processes in ZABs. However, the dynamic evolution and reaction mechanisms regulated by electrolytes at both the positive and Zn negative electrodes remain elusive.
View Article and Find Full Text PDFInterface-Engineering-Induced C-C Coupling for CH Photosynthesis from Atmospheric-Concentration CO Reduction.
Angew Chem Int Ed Engl
November 2024
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
Article Synopsis
- Producing ethylene from carbon dioxide through photoreduction has been challenging due to the difficulty of C-C coupling, but this study introduces a new solution using metal atom clusters on semiconductor nanosheets.
- The research highlights the use of Pd nanoclusters on ZnO nanosheets, demonstrating that they can facilitate the C-C coupling process needed to convert CO2 into ethylene (C2H4) in pure water.
- Results show that the Pd-ZnO system achieved a significant formation rate of 1.03 μmol g-1 h-1 for ethylene production from atmospheric CO2, while just using ZnO alone only yielded carbon monoxide.
Facile synthesis of defective ZnS-ZnO composite nanosheets for efficient piezocatalytic H production.
Nanoscale
December 2024
College of Chemical Engineering and Materials, Quanzhou Normal University, Quanzhou 362000, China.
A facile approach was developed for the synthesis of ultrathin ZnS-ZnO nanosheets. By simply manipulating the synthesis temperature, ZnS-ZnO composite nanosheets with sulfur vacancies were successfully obtained using ZnS(en) as the precursor. The formation of the ZnS-ZnO composite leads to the creation of a heterojunction at the interface between the two materials, which enhances the separation of piezogenerated electrons and holes.
View Article and Find Full Text PDFZ-Scheme Enabled 1D/2D Nanocomposite of ZnO Nanorods and Functionalized g-C3 N4 Nanosheets for Sustainable Degradation of Terephthalic Acid.
ChemSusChem
November 2024
Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, 110025, India.
The urgent need to mitigate water pollution and achieve Sustainable Development Goal 14 (SDG 14)-Life below water, necessitates developing efficient and eco-friendly wastewater treatment technologies. This research addresses this challenge by photocatalytic degradation of terephthalic acid, a precursor for PET bottles using environment-friendly and biocompatible photocatalysts. The 1D/2D nanocomposite comprising zinc oxide (ZnO) nanorods and functionalized graphitic carbon nitride (Zn-TG) nanosheets were synthesized and thoroughly characterized.
View Article and Find Full Text PDFConstruction of Ag-modified ZnO/g-C3N4 heterostructure for enhanced photocatalysis performance.
J Chem Phys
October 2024
Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
ZnO/g-C3N4 heterojunction modified with Ag nanoparticles (ZnO/CN/Ag) was synthesized by depositing ZnO nanorods/Ag nanoparticles onto g-C3N4 nanosheets. Under xenon lamp irradiation, 99% of Rhodamine B (RhB) was degraded by ZnO/CN/Ag-5% composite within 30 min, which was much higher than the degradation efficiency of ZnO and ZnO/CN. The synergistic effect of g-C3N4 and ZnO, along with the localized surface plasmon resonance effect of Ag NPs, contributes to the improvement of photocatalytic performance.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!