Self-reduction combined with photo-deposition decorating Au nanoparticles on urchin-like WO2.72 for enhancement of trimethylamine-sensing performance

Shang, Yaru; Cui, Yongping; Shi, Ruixia; Zhang, Aiyu; Wang, Yingzi; Yang, Ping

doi:10.1016/j.mssp.2019.05.037

Cited by 18 publications

(19 citation statements)

References 39 publications

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“…The peaks of W, O, Pd, and Au elements can be seen in a full-range XPS spectrum (Figure 5a). In the W 4f spectrum (Figure 5b), the peaks located at 35.5 and 37.6 eV are attributed to W 6+ , 15 while the peaks at 34.2 and 36.2 eV are associated with W 5+ . 25 In Figure 5c, the O 1s spectrum was decomposed into three peaks.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…According to our previous report, the specific surface area of WO 2.72 microspheres is 121.8 m 2 /g. 15 The specific surface areas of 1%PW, 2%PW, and 3%PW are 133.4, 162.5, and 154.6 m 2 /g, respectively (Table S3), indicating that the formation of PdO increased the surface area of samples. Meanwhile, the specific surface areas of 1% AuPW, 2%AuPW, and 3%AuPW are 167.4, 182.2, and 176.4 m 2 /g, respectively, suggesting that the introduction of Au further increased the surface area.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…WO 2.72 microspheres were directly prepared by a solvothermal method according to our previous work. 15 PdO-nanoparticle-modified WO 2.72 microspheres were achieved by a wet impregnation method. Typically, 50 mg of WO 2.72 was added to 10 mL of ethanol and sonicated for 10 min.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The Au/PdO/ WO 2.72 composite was synthesized by a facile photodeposition method. 15 First, 50 mg of PdO/WO 2.72 (2%PW) was dispersed in 50 mL of deionized water. Then, 338 μL of HAuCl 4 (5 mM) solution was added to the above solution under stirring.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The sensors were fabricated according to our previously reported method. 15 Briefly, an appropriate amount of deionized water was added to a certain amount of sample to form a uniform paste, which was coated on a Ag−Pd electrode substrate (13.4 × 7 mm) surface with a brush. After being dried naturally, the sensors were fixed to adjustment probes in the chamber for testing.…”

Section: ■ Introductionmentioning

confidence: 99%

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Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Shang

Shi

Cui

et al. 2020

ACS Appl. Nano Mater.

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Urchin-like WO2.72 microspheres modified with Au and PdO nanoparticles were constructed and applied to the field of gas sensors. The gas-sensing test results showed that the Au/PdO/WO2.72 sensors exhibited excellent gas-sensitive performances. The sensors have not only an ultrahigh response to TMA but also a rapid response/recovery time. Especially WO2.72 decorated with 2 wt % Au and 2 wt % PdO nanoparticles (2%AuPW), its response to 40 ppm of TMA can be up to 802.5 at 240 °C, which is approximately 110.5 and 1.6 times of WO2.72 (7.26) and 2 wt % PdO/WO2.72 (496.6) at 260 °C, respectively. Even for 1 ppm of TMA, the response of the as-obtained 2%AuPW sensor can still attain 10.9. Furthermore, the Au/PdO/WO2.72 sensor showed excellent effectiveness after 30 days. The BET results indicate that the deposition of PdO and Au nanoparticles increases the specific surface area of the sample. The mechanism analysis revealed that the markedly increased gas-sensing properties of Au/PdO/WO2.72 sensors are ascribed to the synergy of surface area and a mesoporous structure, a p–n heterojunction, and a catalytic spillover effect of PdO and Au nanoparticles. The rational design and detailed investigation of Au/PdO/WO2.72 sensors provide insights into the development and design of other semiconductor-based sensors.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Shang

Shi

Cui

et al. 2020

ACS Appl. Nano Mater.

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Rationally Designed Dual‐Mesoporous Transition Metal Oxides/Noble Metal Nanocomposites for Fabrication of Gas Sensors in Real‐Time Detection of 3‐Hydroxy‐2‐Butanone Biomarker

et al. 2021

Adv Funct Materials

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Transition metal oxides/noble metal (TMOs/NM) nanocomposites are one kind of important material for semiconductor gas sensors. The controllable construction of a highly connected mesoporous structure and easily accessible active sites is essential for gas sensing performance but remains a great challenge. Herein, a soluble mercapto phenolic resin polymer mediated co-assembly approach is proposed for the construction of ordered dual mesoporous structure and the simultaneous loading of highly dispersed noble metal nanoparticles. The home-made soluble mercapto phenolic resin polymer enabled the co-assembly of transition metal precursors, noble metal precursors, and poly(ethylene oxide)-block-polystyrene (PEO-b-PS) micelles, resulting in a straightforward synthesis of ordered dual-mesoporous TMOs/NM nanocomposites (e.g., WO 3 /Au, TiO 2 /Au, NbO x /AuPd). As proof of the concept, the synthesized dual-mesoporous WO 3 /Au materials are applied for sensing of 3-hydroxy-2-butanone, a biomarker of food-borne pathogenic bacteria Listeria monocytogenes. The sensors exhibit high sensitivity (R a /R g = 18.8 to 2.5 ppm) and high selectivity based on their noble metal sensitization and superior mesopore connectivity for gas diffusion. Furthermore, the synthesized gas sensors are integrated into a wireless sensing module connected to a smartphone, providing a rapid and convenient real-time detection of 3-hydroxy-2-butanone.

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A Straightforward Solvent‐Pair‐Enabled Multicomponent Coassembly Approach toward Noble‐Metal‐Nanoparticle‐Decorated Mesoporous Tungsten Oxide for Trace Ammonia Sensing

Jiang,

Deng,

Chen

et al. 2024

Advanced Materials

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The straightforward synthesis of noble‐metal‐nanoparticle‐decorated ordered mesoporous transition metal oxides remains a great challenge due to the difficulty of balancing the interactions between precursors and templates. Herein, a solvent‐pair‐enabled multicomponent coassembly (SPEMC) strategy is developed for straightforward synthesis of noble‐metal‐nanoparticle‐decorated nitrogen‐doped ordered mesoporous tungsten oxide (abbreviated as NM/N‐mWO3, NM = Pt, Rh, Pd). The amphiphilic poly(ethylene oxide)‐block‐polystyrene (PEO‐b‐PS) copolymers coassemble with ammonium metatungstate (AMT) clusters and different kinds of hydrophilic noble metal precursors without phase separation. SPEMC synthesis requires no direct interaction between PEO‐b‐PS and AMT, thus the assembly equilibriums between noble metal precursors and PEO‐b‐PS can be readily controlled. The obtained NM/N‐mWO3 nanocomposites possess ordered mesopores, abundant oxygen vacancies, and metal–metal oxide interfaces. As a result, the Pt/N‐mWO3 sensors exhibit superior ammonia sensing performances with high sensitivity, an ultralow limit of detection (51.2 ppb), good selectivity, and long‐term stability. Spectroscopic analysis reveals that ammonia is oxidized stepwise to NO, NO2−, and NO3− during the sensing process. Moreover, a portable wireless module based on Pt/N‐mWO3 sensor can recognize ppm‐level concentration of ammonia, which lays a solid foundation for its application in various fields.

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Self-reduction combined with photo-deposition decorating Au nanoparticles on urchin-like WO2.72 for enhancement of trimethylamine-sensing performance

Cited by 18 publications

References 39 publications

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Rationally Designed Dual‐Mesoporous Transition Metal Oxides/Noble Metal Nanocomposites for Fabrication of Gas Sensors in Real‐Time Detection of 3‐Hydroxy‐2‐Butanone Biomarker

A Straightforward Solvent‐Pair‐Enabled Multicomponent Coassembly Approach toward Noble‐Metal‐Nanoparticle‐Decorated Mesoporous Tungsten Oxide for Trace Ammonia Sensing

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Self-reduction combined with photo-deposition decorating Au nanoparticles on urchin-like WO2.72 for enhancement of trimethylamine-sensing performance

Cited by 18 publications

References 39 publications

Urchin-Like WO2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Urchin-Like WO2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Rationally Designed Dual‐Mesoporous Transition Metal Oxides/Noble Metal Nanocomposites for Fabrication of Gas Sensors in Real‐Time Detection of 3‐Hydroxy‐2‐Butanone Biomarker

A Straightforward Solvent‐Pair‐Enabled Multicomponent Coassembly Approach toward Noble‐Metal‐Nanoparticle‐Decorated Mesoporous Tungsten Oxide for Trace Ammonia Sensing

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Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine