Surface fluorination of α-Fe2O3 using selectfluor for enhancement in photoelectrochemical properties

Janu, Vikash Chandra; Bahuguna, Gaurav; Laishram, Devika; Shejale, Kiran P.; Kumar, Narendra; Sharma, Rakesh K.; Gupta, Ritu

doi:10.1016/j.solmat.2017.09.006

Cited by 22 publications

(11 citation statements)

References 42 publications

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“…However, in practice, the photocurrent density of as-prepared Fe2O3 photoanodes is lower than 3 mA cm −2 . This is mostly attributed to the low mobility of carriers (<0.1 cm 2 V −1 s −1 ) [7] and the sluggish oxygen evolution reaction (OER) kinetics, which are affected by the surface states [8,9]. The PEC performance of Fe2O3 could be improved by using nanostructured Fe2O3 [10,11] and foreign element doping [12].…”

Section: Introductionmentioning

confidence: 99%

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

Xiao

Fan

Huang

et al. 2020

Chinese Journal of Catalysis

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Section: Introductionmentioning

confidence: 99%

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

Xiao

Fan

Huang

et al. 2020

Chinese Journal of Catalysis

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“…The objectives of our study are to study the effect of adding sand into paraffin mixture with respect to the thermal performance of the PCM, especially for the supercooling degree, charging and discharging rate (time and temperature range). When the all thermal performance is obtained, it can be used as specific reference for the application of PCM in thermal storage application [24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Improvement the performance of composite PCM paraffin-based incorporate with volcanic ash as heat storage for low-temperature application

et al. 2021

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Paraffin is well known thermal energy storage with the high latent heat of fusion. Unfortunately, low thermal conductivity and low melting temperature inhibit large-scale applications for lower temperature applications like solar water heaters and desalination. The addition of high thermal conductivity material can increase the thermal conductivity of paraffin and increase the melting temperature of paraffin. In this study, a new approach is taken by using volcanic sand as thermal conductivity enhancement material. The properties of the sand are examined. The chemical composition of the sand is dominated by Fe (51.23 %), Fe2O3 (23.24 %) and SiO2 (11 %), which are known as good thermal conductivity materials. Six different compositions of paraffin/sand (weight ration) are tested to observe the melting and vapor temperature of the composite. Adding sand (with granule size of 44 µm) by 30 wt % can accelerate the charging rate by 25 % compared to pure paraffin, where the discharging rate is increased significantly by 17.8 %. The supercooling degree of the composite is only 1 °C, where pure paraffin has a supercooling degree by 8 °C. The charging and discharging characteristics for each sample are discussed in detail within the article. Overall, the addition of volcanic sand improves paraffin's charging and discharging rate, reducing the supercooling degree and can be considered a convenient method to improve the paraffin performance as latent heat storage

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“…Herein, we have explored fluorination of SnO 2 film via a simple, solution-based treatment using an electrophilic fluorinating agent, Selectfluor (F-TEDA). Most of the fluorinating agents used regularly are nucleophilic, with F – as the active reacting species, while electrophilic fluorinating agents have recently emerged as a new class of molecules that are safe to handle, efficient, and cost-effective. − The fluorination of SnO 2 , optimized to restrict to low percentages (<1%), produced excellent responses for VOCs even at moderate temperatures while keeping the sensing element transparent. A fast recovery of such an areal transparent sensor was aided by a UV pulse.…”

Section: Introductionmentioning

confidence: 99%

Innovative Approach to Photo-Chemiresistive Sensing Technology: Surface-Fluorinated SnO₂ for VOC Detection

Bahuguna

Mondal

Verma

et al. 2020

ACS Appl. Mater. Interfaces

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Transparent electronics continues to revolutionize the way we perceive futuristic devices to be. In this work, we propose a technologically advanced volatile organic compound (VOC) sensor in the form of a thin-film transparent display fabricated using fluorinated SnO 2 films. A solution-processed method for surface fluorination of SnO 2 films using Selectfluor as a fluorinating agent has been developed. The doped fluorine was optimized to be <1%, resulting in a significant increase in conductivity and reduction in persistent photoconductivity accompanied by a faster decay of the photogenerated charge carriers. A combination of these modified properties, together with the intrinsic sensing ability of SnO 2 , was exploited in designing a transparent display sensor for ppm-level detection of VOCs at an operating temperature of merely 150 °C. Even a transparent metal mesh heater is integrated with the sensor for ease of operation, portability, and less power usage. A sensor reset method is developed while shortening the UV exposure time, enabling complete sensor recovery at low operating temperatures. The sensor is tested toward a variety of polar and nonpolar VOCs (amines, alcohols, carbonyls, alkanes, halo-alkanes, and esters), and it exhibits an easily differentiable response with sensitivity in line with the electrondonating tendency of the functional group present. This work opens up the door for multiplexed sensor arrays with the ability to detect and analyze multiple VOCs with specificity.

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Surface fluorination of α-Fe2O3 using selectfluor for enhancement in photoelectrochemical properties

Cited by 22 publications

References 42 publications

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

Improvement the performance of composite PCM paraffin-based incorporate with volcanic ash as heat storage for low-temperature application

Innovative Approach to Photo-Chemiresistive Sensing Technology: Surface-Fluorinated SnO₂ for VOC Detection

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Surface fluorination of α-Fe2O3 using selectfluor for enhancement in photoelectrochemical properties

Cited by 22 publications

References 42 publications

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

Improvement the performance of composite PCM paraffin-based incorporate with volcanic ash as heat storage for low-temperature application

Innovative Approach to Photo-Chemiresistive Sensing Technology: Surface-Fluorinated SnO2 for VOC Detection

Contact Info

Product

Resources

About

Innovative Approach to Photo-Chemiresistive Sensing Technology: Surface-Fluorinated SnO₂ for VOC Detection