Improved electrode performance in microbial fuel cells and the enhanced visible light-induced photoelectrochemical behaviour of PtO @M-TiO2 nanocomposites
Source abstract
Abstract
Visible light active PtOx@M-TiO2 and PtOx@P-TiO2 (x ¼0, 1 and 2) nanocomposites were fabricated via a simple, green and environmentally benign process using an electrochemically active biofilm. The formation of the PtOx@M-TiO2 and PtOx@P-TiO2 nanocomposites was confirmed by X-ray diffraction, ultraviolet–visible–near infrared spectrophotometry, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy (XPS). XPS revealed the presence of Pt 0 ,P t 2 þ (PtO) and Pt 4 þ (PtO2) species on the surface of M-TiO2 and P-TiO2. The presence of mixed valence states of PtOx on the surface of the PtOx@M-TiO2 nanocomposite and defect states in M-TiO2 helps absorb visible light more efficiently compared to the PtOx@P-TiO2 nanocomposite. Cyclic voltammetry, electrochemical impedance spectroscopy and linear scan voltammetry confirmed the enhanced photoelectrochemical performance of the PtOx@M-TiO2 nanocomposite compared to the PtOx@P-TiO2 nanocomposite under visible light irradiation. Furthermore, the PtOx@M-TiO2 nanocomposite was used as a cathode material in microbial fuel cells and showed a higher power density compared to the PtOx@P-TiO2 nanocomposite and plain carbon paper due to the high catalytic activity of platinum and defective M-TiO2. & 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microbial Fuel Cells and Bioremediation · Advanced Photocatalysis Techniques · Electrochemical sensors and biosensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Titanium dioxide-based nanomaterials for photocatalytic fuel generations10.1021/cr500008u ↗
2. Earth-abundant cocatalysts for semiconductor based photocatalytic water splitting10.1039/C3CS60425J ↗
3. Strategies for improving the efficiency of semiconductor metal oxide photocatalysis10.1039/c4mh00031e ↗
4. New insights into the mechanism of visible light photocatalysis10.1021/jz501030x ↗
5. Tungsten concentration influence on the structural, electronic, optical and photocatalytic properties of tungsten-silver codoped titanium dioxide10.1016/j.ceramint.2015.01.059 ↗
6. A study on the mechanism for the interaction of light with noble metal-metal oxide semiconductor nanostructures for various photophysical applications10.1039/c3cs60043b ↗
7. Semiconductor heterojunction photocatalysts: design, construction, and photocatalytic performances10.1039/C4CS00126E ↗
8. Efficient photocatalytic degradation of methylene blue over BiVO4/TiO2 nanocomposites10.1016/j.ceramint.2015.01.040 ↗
9. Band gap narrowing of titanium dioxide (TiO2) nanocrystals by electrochemically active biofilms and their visible light activity10.1039/c3nr01280h ↗
10. Band gap engineered TiO2 nanoparticles for visible light induced photoelectrochemical and photocatalytic studies10.1039/C3TA14052K ↗
11. Defective black tio2 synthesized via anodization for visible-light photocatalysis10.1021/am405549p ↗
12. Quick and facile preparation of visible light-driven TiO2 Photocatalyst with High absorption and photocatalytic activity10.1038/srep07045 ↗
13. Stable blue TiO2−x nanoparticles for efficient visible light photocatalysts10.1039/c3ta14484d ↗
14. Mesostructured Pt/TiO2 nanocomposites as highly active photocatalysts for the photooxidation of dichloroacetic acid10.1021/jp110959b ↗
15. Plasmon-driven selective oxidation of aromatic alcohols to aldehydes in water with recyclable Pt/TiO2 nanocomposites10.1002/cctc.201000303 ↗
16. Simultaneous enhancement of methylene blue degradation and power generation in a microbial fuel cell by gold nanoparticles10.1021/ie4006244 ↗
17. Conversion of wastes into bioelectricity and chemicals by using microbial electrochemical technologies10.1126/science.1217412 ↗
18. pTSA doped conducting graphene/polyaniline nanocomposite fibers: thermoelectric behavior and electrode analysis10.1016/j.cej.2013.12.033 ↗
19. Mixed culture electrochemically active biofilms and their microscopic and spectroelectrochemical studies10.1021/sc400330r ↗
20. Positively Charged Gold Nanoparticles Synthesized by Electrochemically Active Biofilm-A Biogenic Approach10.1166/jnn.2013.7666 ↗
21. Band gap engineering of CeO2 nanostructure using an electrochemically active biofilm for visible light applications10.1039/C4RA00861H ↗
22. Growth and characterization of reactively sputtered thin-film platinum oxides10.1063/1.347255 ↗
23. The enhancement of photodegradation efficiency using Pt-TiO2 catalyst10.1016/S0045-6535(02)00201-1 ↗
24. Synthesis of M@TiO2 (M=Au, Pd, Pt) core-shell nanocomposites with tunable photoreactivity10.1021/jp2009989 ↗
25. Enhanced photoluminescence and photoactivity of plasmon sensitized nSiNWs/TiO2 heterostructures10.1039/C4CP01497A ↗
26. A novel Pt/CeO2 catalyst coated with nitrogen-doped carbon with excellent performance for DMFCs10.1039/c3ta14418f ↗
27. Preparation of TiO2–Pt Hybrid nanofibers and their application for sensitive hydrazine detection10.1039/c0nr00773k ↗
28. Nanocomposite for methanol oxidation: synthesis and characterization of cubic Pt nanoparticles on graphene sheets10.1088/1468-6996/14/3/035001 ↗
29. Microstructure and property control in TiO2–Pt nanocomposite thin films10.1016/j.ceramint.2014.08.089 ↗
30. Microwave-assisted hydrothermal synthesis of graphene based Au−TiO2 photocatalysts for efficient visible-light hydrogen production10.1039/C3TA14908K ↗
31. Fast and spontaneous reduction of gold ions over oxygen-vacancy-rich TiO2: a novel strategy to design defect-based composite photocatalyst10.1016/j.apcata.2013.04.007 ↗
32. Highly active oxide photocathode for photoelectrochemical water reduction10.1038/nmat3017 ↗
33. Electrochemical response of metal complexes in homogeneous solution under photoirradiation10.1038/srep05327 ↗
34. Investigation of the kinetics of a TiO2 photoelectrocatalytic reaction involving charge transfer and recombination through surface states by electrochemical impedance spectroscopy10.1021/jp051821z ↗
35. Combined biomass valorization and hydrogen production in a photoelectrochemical cell10.1038/nchem.2194 ↗
36. A dual-chambered microbial fuel cell with Ti/Nano-TiO2/Pd nano-structure cathode10.1016/j.jpowsour.2012.07.096 ↗
37. Application of electrochemically active bacteria as anodic biocatalyst in microbial fuel cells10.1016/S1872-2040(15)60800-3 ↗
38. Titanium dioxide in fuel cell technology: an overview10.1016/j.jpowsour.2014.12.014 ↗
39. TiO2 nanoparticles-decorated carbon nanotubes for significantly improved bioelectricity generation in microbial fuel cells10.1016/j.jpowsour.2013.01.146 ↗