ZnO/TiO2 hetero-structured nanosheets for effectively detecting formaldehyde at room temperature
Source abstract
Abstract
In this study, ZnO/TiO 2 nanosheets were synthesized using a hydrothermal method followed by annealing. The resulting hierarchical ZnO–TiO 2 heterostructures exhibited improved gas-sensing performance compared with pure ZnO. We demonstrated that tuning the ratio of Zn to Ti components in the heterostructure allowed us to adjust the sensor stability, with the best- performing sample having a Zn:Ti ratio of 2:1. A notable reduction was observed in both the sensor response and recovery times, down to 22 and 17 s, respectively, by utilizing nanosheet- structured ZnO/TiO 2 heterojunctions. To gain insight into the interaction between the sensing materials and formaldehyde (HCHO) molecules, we performed first-principles calculations to examine the density of states, charge transfer, and energy of adsorption. Our approach to constructing heterogeneous structures contributes to overcoming the low desorption efficiency and slow response-recovery time of pure ZnO for gas-sensing applications.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Chemical Sensor Technologies · Polydiacetylene-based materials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Abatement of various types of VOCs by adsorption/catalytic oxidation: a review10.1016/j.cej.2019.03.232 ↗
2. Adsorption materials for volatile organic compounds (VOCs) and the key factors for VOCs adsorption process: a review10.1016/j.seppur.2019.116213 ↗
3. A review on chemiresistive ZnO gas sensors10.1016/j.snr.2022.100100 ↗
4. Two-dimensional nanostructured materials for gas sensing10.1002/adfm.201702168 ↗
5. Room-temperature gas sensing of ZnO-based gas sensor: a review10.1016/j.sna.2017.10.021 ↗
6. UV-activated hollow ZnO@TiO2 heterostructured nanaospheres for detecting formaldehyde at room temperature10.1016/j.snb.2023.134306 ↗
7. Fabrication of ZnO quantum dots@SnO2 hollow nanospheres hybrid hierarchical structures for effectively detecting formaldehyde10.1016/j.snb.2020.128222 ↗
8. Enhanced gas sensing performance of perovskite YFe1−xMnxO3 by doping manganese ions10.1039/D0RA01375G ↗
9. Gas sensing properties of cotton-based carbon fibers and ZnO/carbon fibers regulated by changing carbonization temperatures10.1016/j.snb.2021.129818 ↗
10. Wool-based carbon fiber/MoS2 composite prepared by low-temperature catalytic hydrothermal method and its application in the field of gas sensors10.3390/nano12071105 ↗
11. Biomimetic gas sensor derived from disposable bamboo chopsticks for highly sensitive and selective detection of NH310.1016/j.cej.2023.142203 ↗
12. First-principles simulation: ideas, illustrations and the CASTEP code
13. Accurate and simple analytic representation of the electron-gas correlation energy10.1103/PhysRevB.45.13244 ↗
14. A climbing image nudged elastic band method for finding saddle points and minimum energy paths10.1063/1.1329672 ↗
15. Fabrication of ZnO–TiO2 nanohybrids for rapid sunlight driven photodegradation of textile dyes and antibiotic residue molecules10.1016/j.optmat.2020.110138 ↗
16. Mesoporous dark brown TiO2 spheres for pollutant removal and energy storage applications10.1016/j.apsusc.2020.146796 ↗
17. A facile and green synthetic approach toward fabrication of Alcea- and thyme-stabilized TiO2 nanoparticles for photocatalytic applications10.1016/j.arabjc.2018.03.014 ↗
18. Revealing the effect of Nb5+ on the electrochemical performance of nickel-rich layered LiNi0.83Co0.11Mn0.06O2 oxide cathode for lithium-ion batteries10.1016/j.jcis.2022.12.142 ↗
19. Research status of gas sensing performance of MoTe2-based gas sensors: a mini review10.3389/fchem.2022.950974 ↗
20. Surface lattice oxygen activation by nitrogen-doped manganese dioxide as an effective and longevous catalyst for indoor HCHO decomposition10.1021/acsami.1c04369 ↗
21. Quantum physics and deep learning to reveal multiple dimensional modified regulation by ternary substitution of iron, manganese, and cobalt on Na3V2(PO4)3 for superior sodium storage10.1002/adfm.202213711 ↗
22. Two-dimensional MoS2 for resonant-gravimetric detection of Ppb-level formaldehyde10.1021/acs.analchem.2c04532 ↗
23. Au-decorated ZnFe2O4 yolk-shell spheres for trace sensing of chlorobenzene10.1021/acsami.0c00525 ↗
24. Fabrication of ZnO/ZnFe2O4 hollow nanocages through metal organic frameworks route with enhanced gas sensing properties
25. One-pot synthesis of cubic ZnSnO3/ZnO heterostructure composite and enhanced gas-sensing performance10.1016/j.jallcom.2018.11.310 ↗
26. Triethylamine gas sensor based on Pt-functionalized hierarchical ZnO microspheres10.1016/j.snb.2020.129425 ↗
27. SnO2/ZnSnO3 double-shelled hollow microspheres based high-performance acetone gas sensor10.1016/j.snb.2020.129212 ↗
28. Tailoring the selectivity of ultralow-power heterojunction gas sensors by noble metal nanoparticle functionalization10.1016/j.nanoen.2021.106241 ↗
29. First example of ZnO-TiO2 nanocomposites by chemical vapor deposition: structure, morphology, composition, and gas sensing performances10.1021/cm701990f ↗
30. Acetone sensors based on La3+ doped ZnO nano-rods prepared by solvothermal method10.1016/S1005-0302(12)60042-5 ↗
31. Ultralow detection limit and ultrafast response/recovery of the H2 gas sensor based on Pd-doped rGO/ZnO-SnO2 from hydrothermal synthesis10.1038/s41378-022-00398-8 ↗
32. FT-IR characterization of tin dioxide gas sensor materials under working conditions10.1016/0584-8539(94)01216-4 ↗
33. Interactions of tin oxide surface with O2, H2O and H210.1016/0039-6028(79)90411-4 ↗
34. Oxygen chemisorption on tin oxide: correlation between electrical conductivity and EPR measurements10.1116/1.570389 ↗
35. Acetone gas sensor based on NiO/ZnO hollow spheres: fast response and recovery, and low (ppb) detection limit10.1016/j.jcis.2017.01.106 ↗
36. Advances in doped ZnO nanostructures for gas sensor10.1002/tcr.202000088 ↗