scholarly journals Active {1 1 1}-faceted ultra-thin NiO single-crystalline porous nanosheets supported highly dispersed Pt nanoparticles for synergetic enhancement of gas sensing and photocatalytic performance

2019 ◽  
Vol 471 ◽  
pp. 124-133 ◽  
Author(s):  
Yan Liang ◽  
Yong Yang ◽  
Hang Zhou ◽  
Chengwu Zou ◽  
Keng Xu ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Single Crystalline ◽  
Porous Nanosheets ◽  
Highly Dispersed

Decoration of ZnO nanowires with Pt nanoparticles and their improved gas sensing and photocatalytic performance

2010 ◽  
Vol 21 (28) ◽  
pp. 285501 ◽  
Author(s):  
Yuan Zhang ◽  
Jiaqiang Xu ◽  
Pengcheng Xu ◽  
Yongheng Zhu ◽  
Xuedong Chen ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Zno Nanowires

Highly dispersed Pt nanoparticles on hierarchical titania nanoflowers with {010} facets for gas sensing and photocatalysis

2019 ◽  
Vol 54 (9) ◽  
pp. 6826-6840 ◽  
Author(s):  
Yan Liang ◽  
Mengqi Ding ◽  
Yong Yang ◽  
Keng Xu ◽  
Xingfang Luo ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Highly Dispersed

scholarly journals Preparation and Photocatalytic Performance for Degradation of Rhodamine B of AgPt/Bi4Ti3O12 Composites

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2206
Author(s):  
Gaoqian Yuan ◽  
Gen Zhang ◽  
Kezhuo Li ◽  
Faliang Li ◽  
Yunbo Cao ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Bimetallic Nanoparticles ◽  
Resonance Effect ◽  
Visible Region ◽  
Photogenerated Electron ◽  
Pt Nanoparticles ◽  
Electron Hole

Loading a noble metal on Bi4Ti3O12 could enable the formation of the Schottky barrier at the interface between the former and the latter, which causes electrons to be trapped and inhibits the recombination of photoelectrons and photoholes. In this paper, AgPt/Bi4Ti3O12 composite photocatalysts were prepared using the photoreduction method, and the effects of the type and content of noble metal on the photocatalytic performance of the catalysts were investigated. The photocatalytic degradation of rhodamine B (RhB) showed that the loading of AgPt bimetallic nanoparticles significantly improved the catalytic performance of Bi4Ti3O12. When 0.10 wt% noble metal was loaded, the degradation rate for RhB of Ag0.7Pt0.3/Bi4Ti3O12 was 0.027 min−1, which was respectively about 2, 1.7 and 3.7 times as that of Ag/Bi4Ti3O12, Pt/Bi3Ti4O12 and Bi4Ti3O12. The reasons may be attributed as follows: (i) the utilization of visible light was enhanced due to the surface plasmon resonance effect of Ag and Pt in the visible region; (ii) Ag nanoparticles mainly acted as electron acceptors to restrain the recombination of photogenerated electron-hole pairs under visible light irradiation; and (iii) Pt nanoparticles acted as electron cocatalysts to further suppress the recombination of photogenerated electron-hole pairs. The photocatalytic performance of Ag0.7Pt0.3/Bi4Ti3O12 was superior to that of Ag/Bi4Ti3O12 and Pt/Bi3Ti4O12 owing to the synergistic effect between Ag and Pt nanoparticles.

scholarly journals Mesoporous titanium niobium nitrides supported Pt nanoparticles for highly selective and sensitive detection of formaldehyde

2021 ◽  
Author(s):  
Chaozhu Huang ◽  
Samira Adimi ◽  
Dongliang Liu ◽  
Haichuan Guo ◽  
Tiju Thomas ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Proton Exchange ◽  
The Poor ◽  
Supported Platinum ◽  
Commercial Carbon ◽  
Niobium Nitrides ◽  
Exchange Membrane ◽  
Gas Sensing Device

Proton exchange membrane fuel cell gas sensor is a promising and novel gas sensing device. However, the poor sensitivity and strong cross sensitivity of commercial carbon-supported-platinum (Pt/C) remain obstacles to...

scholarly journals Exterior and Internal Uniform Loading of Pt Nanoparticles on Yolk-Shell La2O3 by Acoustic Levitation Synthesis with Enhanced Photocatalytic Performance

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 107 ◽  
Author(s):  
Ming Qin ◽  
Qing Chang ◽  
Yinkai Yu ◽  
Hongjing Wu
Keyword(s):  
Metal Oxide ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Shell Structure ◽  
Photocatalytic Performance ◽  
Chemical Interaction ◽  
Pt Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Homogeneous Distribution ◽  
Acoustic Levitation

By the deposition of noble metal nanoparticles on a metal oxide substrate with a specific micro-/nanostructure, namely, yolk-shell structure, a remarkable improvement in photocatalytic performance can be achieved by the composites. Nevertheless, noble metal nanoparticles only distribute on the surface shell of metal oxide substrates when the conventional wet-chemistry reduction approach is employed. Herein, we proposed a novel acoustic levitation synthesis of Pt nanoparticles deposited on yolk-shell La2O3. The composites not only displayed well-defined, homogeneous distribution of Pt NPs on the exterior shell of La2O3 and the interior La2O3 core, but an enhanced chemical interaction between Pt and La2O3. The unique structure not only can display improved photocatalytic degradation rate toward methyl orange, but also may show great potential in fields of hydrogen generation, environmental protection, etc. The novel acoustic levitation synthesis can supplement the methodology of synthesizing well dispersed noble metal oxides over the whole yolk-shell structure through noble metal NPs deposition method.

Synthesis and Chemoresistive Gas-Sensing Properties of Highly Dispersed Titanium-Doped Nb2O5

2021 ◽  
Vol 66 (9) ◽  
pp. 1425-1433
Author(s):  
A. S. Mokrushin ◽  
N. P. Simonenko ◽  
T. L. Simonenko ◽  
E. P. Simonenko ◽  
V. G. Sevast’yanov ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Highly Dispersed

Synthesis and characterization of Au, Pt supported on graphene aerogel catalysts for CO oxidation at low temperature

2021 ◽  
Vol 11 (1) ◽  
pp. 118-122
Author(s):  
Chuyen Phan Thi ◽  
Hang Tran Thi Thanh ◽  
Phong Pham Nam ◽  
Ha Vu Thi Thu
Keyword(s):  
Low Temperature ◽  
Ambient Temperature ◽  
Co Oxidation ◽  
Pt Nanoparticles ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Graphene Aerogel ◽  
Highly Dispersed ◽  
Average Size

Au, Pt supported on graphene aerogel catalysts (PtAu/rGOA) with molar ratio of Pt and Au of 1:1, and total metal concentration of 5 % were successfully synthesized by hydrothermal method.  The obtained catalysts were characterized by Raman, XRD, XPS, HR-TEM, BET. It revealed that Au and Pt nanoparticles with average size of 3 – 5 nm were highly dispersed on aerogel graphene. The activity of these catalysts was tested  in CO oxidation. The results showed that the conversion of CO at ambient temperature was 100% during 25 minutes. Accordingly, PtAu/rGOA could be considered as a potential catalysts for CO oxidation at low temperature.

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