Hydrothermal synthesis of nanostructured flower-like Ni(OH)<sub>2</sub>particles and their excellent sensing performance towards low concentration HCN gas

Hu, Mingzhen; He, Junhui; Yang, Mingqing; Hu, Xiaochun; Cao, Yan; Cheng, Zhenxing

doi:10.1039/c5ra02742j

Cited by 10 publications

(4 citation statements)

References 32 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the bending mode of water molecules is also observed at 1635 cm −1 . A strong vibrational band around 514 cm −1 corresponds to νNi‐OH vibration and that at 469 cm −1 corresponds to νNi−O stretching mode . These vibrational bands confirm that the as‐prepared Ni(OH) 2 and rGO−Ni(OH) 2 hybrid films are in β (brucite) form .…”

Section: Resultssupporting

confidence: 57%

Hybrid Films of Ni(OH)₂ Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

et al. 2019

View full text Add to dashboard Cite

Free‐standing films of reduced graphene oxide (rGO) based Ni(OH)2 nanowall structures are generated at a liquid/liquid interface involving in situ reaction and self‐assembly. The nanowall network of Ni(OH)2 sheets anchored on rGO layers with 10–15 nm wall thickness and ordered voids of average size 100 nm can serve as excellent candidates for catalyzing electrochemical oxygen evolution reaction (OER) as they expose maximum edge sites of Ni(OH)2 and allow diffusion and penetration of electrolytes into voids enhancing the contact area of the electrolyte/electrocatalyst interface. The unique morphology of the hybrid films exhibited high electrochemical surface area and low charge transfer resistance. Accordingly, rGO−Ni(OH)2 hybrid films display excellent catalytic activity and high cycling stability in alkaline solutions giving a current density of 10 mA cm−2 at an overpotential of 378 mV with a Tafel slope of 56 mV dec−1. The hybrid films also exhibited a high specific and areal capacitance of 1402 Fg−1 and 98.12 mF cm−2 at a scan rate of 5 mVs−1. OER activity and capacitance of the hybrid rGO−Ni(OH)2 films are higher compared to that of bare Ni(OH)2 film and is attributed to the synergic effect between the rGO layer and the ordered interconnected nanowall Ni(OH)2 nanostructures. The primary advantage of these hybrid films is that they can be collected on the desired substrate for ready use as electrodes without the use of any external binders.

show abstract

Section: Resultssupporting

confidence: 57%

Hybrid Films of Ni(OH)₂ Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

et al. 2019

View full text Add to dashboard Cite

show abstract

“…856 eV), indicating low valence of surface nickel, which may be because of the partial reduction of nickel ions. 23 In addition, some extra lines marked as satellite peaks (879.2 eV, 861.4 eV) around the Ni 2p 1/2 and Ni 2p 3/2 signals are also observed.…”

Section: Synthesis and Characterization Of Ag/ni(oh) 2 Compositesmentioning

confidence: 94%

Facile preparation of Ag/Ni(OH)₂ composites with enhanced catalytic activity for reduction of 4-nitrophenol

et al. 2017

View full text Add to dashboard Cite

show abstract

“…H ydrogen cyanide (HCN) is a highly volatile poisonous gas and is widely recognized as a toxic industrial chemical, 1 chemical warfare agent, 2 and hazardous gas. 3 Small amounts of gaseous HCN can be found in the human body due to endogenous biological processes and environmental exposure and can be detected from exhaled breath. 4 The median end-tidal mouth-exhaled HCN concentrations are typically within 5−15 ppbv while the nose-exhaled HCN are of 1−2 ppbv for healthy adults.…”

mentioning

confidence: 99%

Online Detection of HCN in Humid Exhaled Air by Gas Flow-Assisted Negative Photoionization Mass Spectrometry

et al. 2023

View full text Add to dashboard Cite

Hydrogen cyanide (HCN) is a well-known toxic compound in many fields. The trace amount of endogenous HCN in human exhalation has been associated with the presence of Pseudomonas aeruginosa (PA) infection in cystic fibrosis (CF) patients. Online monitoring of HCN profile is promising to screen PA infection rapidly and accurately. In this study, a gas flowassisted negative photoionization (NPI) mass spectrometry method was developed for monitoring the single-exhalation HCN profile. The sensitivity could be optimized by introducing helium to eliminate the humidity influence and reduce the low mass cutoff effect, with improvements of a factor 150 observed. By employing a purging gas procedure and minimizing the length of the sample line, the residual and response time were greatly reduced. The limit of detection (LOD) of 0.3 ppbv and time resolution of 0.5 s were achieved. HCN profiles of exhalations from different volunteers before or after gargling with water were detected to show the performance of the method. All profiles showed a sharp peak and a stable end-tidal plateau, representing the concentration of oral cavity and end-tidal gas, respectively. The HCN concentration based on the plateau of the profile showed better reproducibility and accuracy, which indicates this method has potential application in the detection of PA infection in CF patients.

show abstract

Hydrothermal synthesis of nanostructured flower-like Ni(OH)₂particles and their excellent sensing performance towards low concentration HCN gas

Abstract: Hierarchically structured Ni(OH)2particles with a well-defined flower-like morphology were synthesizedviaa hydrothermal route.

Cited by 10 publications

References 32 publications

Hybrid Films of Ni(OH)₂ Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

Hybrid Films of Ni(OH)₂ Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

Facile preparation of Ag/Ni(OH)₂ composites with enhanced catalytic activity for reduction of 4-nitrophenol

Online Detection of HCN in Humid Exhaled Air by Gas Flow-Assisted Negative Photoionization Mass Spectrometry

Contact Info

Product

Resources

About

Hydrothermal synthesis of nanostructured flower-like Ni(OH)2particles and their excellent sensing performance towards low concentration HCN gas

Abstract: Hierarchically structured Ni(OH)2particles with a well-defined flower-like morphology were synthesizedviaa hydrothermal route.

Cited by 10 publications

References 32 publications

Hybrid Films of Ni(OH)2 Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

Hybrid Films of Ni(OH)2 Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

Facile preparation of Ag/Ni(OH)2 composites with enhanced catalytic activity for reduction of 4-nitrophenol

Online Detection of HCN in Humid Exhaled Air by Gas Flow-Assisted Negative Photoionization Mass Spectrometry

Contact Info

Product

Resources

About

Hydrothermal synthesis of nanostructured flower-like Ni(OH)₂particles and their excellent sensing performance towards low concentration HCN gas

Hybrid Films of Ni(OH)₂ Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

Hybrid Films of Ni(OH)₂ Nanowall Networks on Reduced Graphene Oxide Prepared at a Liquid/Liquid Interface for Oxygen Evolution and Supercapacitor Applications

Facile preparation of Ag/Ni(OH)₂ composites with enhanced catalytic activity for reduction of 4-nitrophenol