Metal-organic framework-derived Cr-doped hollow In2O3 nanoboxes with excellent gas-sensing performance toward ammonia

Sun, Jing; Wang, Yanzheng; Song, Peng; Yang, Zhongxi; Wang, Qi

doi:10.1016/j.jallcom.2021.160472

Cited by 50 publications

(8 citation statements)

References 56 publications

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“…42 Furthermore, the In 3d spectrum showed two prominent peaks at 445.8 and 453.6 eV, which corresponded to In 2 O 3 and In, respectively (Figure S6a). 19,43 As shown in Figure 4e, peaks at 706.1, 708.6, and 711.2 eV of the Fe 2p 3/2 spectrum were assigned to Fe, Fe 3 O 4 , and Fe 2 O 3 , respectively. 44 More importantly, the Fe 2p 3/2 peaks at 709.8 can be attributed to FeS, 45 consistent with the peak at 161.5 eV in the S 2p signal.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Wang

Xie

Guo

et al. 2023

ACS Appl. Nano Mater.

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Thiadiazole compounds and their derivatives have good carrying capacity and lubricating properties. Herein, polydopamine can be in situ self-assembled onto gallium-based liquid metal (GLM) nanoparticles via ultrasound treatment of bulk GLM nanoparticles in dopamine-containing Tris aqueous solution followed by covalent bonding with a thiadiazole dimer (DMCT) through Michael addition reactions. The as-prepared thiadiazole dimer-functionalized liquid metal (GLM-DMCT) nanoparticles, with an average particle size of 380 nm, can be used as nanoadditives in the base oil (500SN). The tribological properties of GLM-DMCT as additives were evaluated under various loads, temperatures, and frequencies, and the results showed that GLM-DMCT additives have improved anti-friction and anti-wear performances of 500SN. The coefficient of friction can be reduced to 0.092 from 0.147 after adding 2 wt % GLM-DMCT, the wear volume reduces by 89.7%, and the load-carrying capacity is increased from 150 to 1050 N. The improved tribological performance is credited to the formation of a stable, protective layer on the friction pair via the complex tribo-chemical reaction of Ga, In, and S elements of GLM-DMCT. Furthermore, the as-prepared GLM-DMCT exhibits good anti-corrosion performance, which is attributed to the breaking of the disulfide bond of DMCT, releasing the corrosion inhibitor DMTD during the corrosion process.

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Section: ■ Results and Discussionmentioning

confidence: 96%

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Wang

Xie

Guo

et al. 2023

ACS Appl. Nano Mater.

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“…Since the 1Cu–In 2 O 3 sensor is an n-type SMO, then the density charge carriers are electrons . Therefore, when the 1Cu–In 2 O 3 sensor is exposed to ambient air as illustrated in Figure (a), the oxygen molecules will adsorb on its surface and generate chemisorbed oxygen ions by apprehending electrons from the conduction band of the 1Cu–In 2 O 3 product. , The type of chemisorbed oxygen ions forming on the surface relies on the working temperature (O 2 – , T < 100 °C; O – , 100 ≤ T ≤ 300 °C; O 2– , T > 300 °C) − In this study, the optimal working temperature obtained for this sensor is 80 °C, therefore O 2 ‑ is predominantly adsorbed on the 1Cu–In 2 O 3 sensor material as per equation . The formed O 2 – ions result in the formation of a thick electron depletion layer (EDL) on the sensor material; therefore, a high resistance will be produced by the 1Cu–In 2 O 3 sensor …”

Section: Resultsmentioning

confidence: 99%

Engineering of Mesoporous Cube-like In₂O₃ Products as Ethanol Detection Platform at Low Operating Temperature: Effects of Different Transition Metals as Dopant Ions

Kgomo,

Swart,

Mhlongo

2024

ACS Omega

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Although most semiconductor metal oxides including In 2 O 3 show acceptable sensitivity to volatile organic compounds, it is difficult to detect ethanol effectively at low operating temperatures and detection levels. In this study, pure and Co-, Ni-, and Cu-doped In 2 O 3 products with their doping content maintained at 1 mol % were successfully produced using a hydrothermal approach. Explicit contrast on the structural, microstructural, and textural properties of the synthesized In 2 O 3 products was examined to determine their gas sensing performance. The Cu-doped In 2 O 3 sensor demonstrated improved response of 15.3 to 50 ppm ethanol and has satisfactory selectivity, stability, low detection limit of 0.2, humidity resistance, and decreased working temperature of 80 °C compared to 150 °C of the pure In 2 O 3 sensor. This optimal gas sensing performance is derived from the cube-like morphology assembled with interlinked nanoparticles, which favors trapping more target gas molecules and exposing more active sites, thereby greatly improving its sensing ability. This study showed that the Cu-doped In 2 O 3 sensor with 1 mol % is suitable for monitoring ethanol gas for food safety applications.

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“…Afterward, a ceramic tube was soldered to the base. The gas test process of the gas sensor has been described in ref . The as-synthesized Au/α-Fe 2 O 3 /Ti 3 C 2 T x MXene nanocomposite material powders was immersed in ethanol to create a paste by milling, and then, carefully pasted onto the tube via a tiny brush to take shape a sensing membrane of the desired thickness, and the final painted sensor was fixed on the test board.…”

Section: Methodsmentioning

confidence: 99%

Au/α-Fe₂O₃/Ti₃C₂T_x MXene Nanosheet Heterojunctions for High-Performance NH₃ Gas Detection at Room Temperature

Liu

Sun

Ding

et al. 2023

ACS Appl. Nano Mater.

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The exploitation of RT sensors with ultra-great sensitivity and unique ammonia (NH3) gas selectivity is still a major scientific task in the field of gas sensing. In the article, a pristine α-Fe2O3 spindle was fabricated by applying the Fe-MIL(88) as the precursor and the sample was smoothly immobilized on the appearance of Ti3C2T x MXene nanosheets through a simple solvothermal reaction, and subsequent gold nanoparticles (Au NPs) were decorated on the α-Fe2O3/Ti3C2T x MXene hybrid material through the in situ reduction process. Gas-sensing measurements presented that the sensor based on the Au/α-Fe2O3/Ti3C2T x MXene nanocomposite exhibited a brilliant NH3 sensing behavior, and the response value of the sensor to NH3 (1 ppm) reached 16.9% at RT under a relative humidity of 25.7%. Moreover, the designed sensor indicated a response/recovery time as low as 3/2 s and good stability. The potential gas sensing mechanism on account of the hybrid structure was discussed combined with the semiconductor depletion layer model and the synergistic effect of the Au/α-Fe2O3/Ti3C2T x MXene ternary heterojunction and Schottky contact theory. Meanwhile, the adsorption effect of NH3 gas was verified by density functional theory calculation. This research is supposed to offer a reliable tactic for large-scale manufacturing of cost-effective, portable, and highly sensitive RT gas sensors.

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Metal-organic framework-derived Cr-doped hollow In2O3 nanoboxes with excellent gas-sensing performance toward ammonia

Cited by 50 publications

References 56 publications

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Engineering of Mesoporous Cube-like In₂O₃ Products as Ethanol Detection Platform at Low Operating Temperature: Effects of Different Transition Metals as Dopant Ions

Au/α-Fe₂O₃/Ti₃C₂T_x MXene Nanosheet Heterojunctions for High-Performance NH₃ Gas Detection at Room Temperature

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Metal-organic framework-derived Cr-doped hollow In2O3 nanoboxes with excellent gas-sensing performance toward ammonia

Cited by 50 publications

References 56 publications

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Engineering of Mesoporous Cube-like In2O3 Products as Ethanol Detection Platform at Low Operating Temperature: Effects of Different Transition Metals as Dopant Ions

Au/α-Fe2O3/Ti3C2Tx MXene Nanosheet Heterojunctions for High-Performance NH3 Gas Detection at Room Temperature

Contact Info

Product

Resources

About

Engineering of Mesoporous Cube-like In₂O₃ Products as Ethanol Detection Platform at Low Operating Temperature: Effects of Different Transition Metals as Dopant Ions

Au/α-Fe₂O₃/Ti₃C₂T_x MXene Nanosheet Heterojunctions for High-Performance NH₃ Gas Detection at Room Temperature