Structural effect of imidazolium-type ionic liquid adsorption to montmorillonite

Zhao, Mingjie; Li, Wei; Zheng, Yong; Liu, Mengping; Wang, Junliang; Qiu, Yuping

doi:10.1016/j.scitotenv.2019.02.297

Cited by 29 publications

(16 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the bigger cation size will lead to the longer cationic alkyl chain (Figure S6). So, the adsorption capacity of bentonite will greatly enhance with the increasing chain length ([HMIM + ]>[BMIM + ]>[EMIM + ]) [33] . This may be due to the positive inductive effect by the electron repulsion of alkyl chains, the positive charge of the cation center is inversely proportional to the induction effect, so the longer the alkyl chain is, the lower the positive induction effect is [34] .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the diffusion coefficient of PCH‐based supercapacitors with the longest cation chain is as low as 4.61×10 −3 V s −1/2 at 70 °C and the diffusion coefficients k of PCB‐based supercapacitors, PCE‐based supercapacitors and traditional liquid electrolyte are 9.79×10 −3 V s −1/2 , 1.76×10 −2 V s −1/2 and 3.14×10 −2 V s −1/2 , respectively. Obviously, the longer cation chain length could effectively enhance the adsorption capacity of bentonite clay and greatly lower the self‐discharge rate [33] . Therefore, the longer cation chain electrolytes with lower diffusion coefficient evidently demonstrate the excellent inhibition effect of clay‐based solid electrolyte on the diffusion of impurity ions.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Chain‐Elongated Ionic Liquid Electrolytes for Low Self‐Discharge All‐Solid‐State Supercapacitors at High Temperature

et al. 2021

View full text Add to dashboard Cite

High power and good stability enable supercapacitors to work efficiently at high temperatures. However, the high‐temperature‐induced excessive ion transfer of the electrolyte would lead to severe self‐discharge behavior, which has often been overlooked but can be highly detrimental. In this study, solid electrolytes consisting of poly(ethylene oxide) (PEO), bentonite clay, and ionic liquids (IL)‐PEO‐clay@[EMIM][BF4] (PCE), PEO‐clay@[BMIM][BF4] (PCB), and PEO‐clay@[HMIM][BF4] (PCH) lead to dramatic decreases in self‐discharge when used in all‐solid‐state supercapacitors at high temperature of 70 °C, which correlate with chain elongation (i. e., [EMIM+]<[BMIM+]<[HMIM+]). Benefiting from both cation adsorption and high‐temperature stabilization by bentonite clay, PCH‐based supercapacitors (IL=[HMIM][BF4]) deliver an extremely low self‐discharge rate, with only a 30.7 % voltage drop over 10 h at 70 °C (44.5 % for 38 h), which is much lower than that of traditional liquid supercapacitors (63.7 % drop over 10 h at 70 °C). This improvement in high‐temperature self‐discharge behavior is found to be from the decrease in diffusion‐controlled faradaic process. Based on the longer‐chain [HMIM+], soft‐packaged supercapacitors exhibit a low self‐discharge rate and work consistently at 70 °C. This chain‐elongation strategy provides a new possibility for the suppression of self‐discharge behavior in supercapacitors and further aids long‐term energy storage by supercapacitors at high temperatures.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Chain‐Elongated Ionic Liquid Electrolytes for Low Self‐Discharge All‐Solid‐State Supercapacitors at High Temperature

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The bands at 920 and 750 cm -1 can be assigned to the OH bending modes of AlOH groups, respectively. The vibrational band at 620 cm -1 , 525 cm -1, and 485 cm -1 resulted from Si-O-Si, and these are the internal asymmetric stretching vibration, coupling vibration of Al-O and Si-O bending vibrations respectively (Zhao et al, 2019;Zhang et al, 2017). The adsorptiondesorption hysteresis loops for the montmorillonite is shown in Figure 5 and correspond to Type H3, which is commonly ascribed to layered materials.…”

Section: Characterization Of Montmorillonitementioning

confidence: 96%

Use of Montmorillonite Clay for Adsorption Malachite Green Dye

Klunk¹,

Shah²,

Wander³

2019

PTQ

View full text Add to dashboard Cite

Removal of malachite green dye by adsorption from aqueous solution using montmorillonite clay is reported in this work. A malachite green dye is a cationic widely used in textile industries. Due to its persistence in the aquatic environment, it becomes a problem for aquatic and terrestrial organisms. This dye can be adsorbed through various techniques, but high acquisition and operating costs preclude widespread use. Several adsorbents are available in the market, but the most outstanding are the clays, especially the montmorillonites. These clays are finely divided material ( 0.002 mm), and its adsorption properties are continuously investigated. Types of clays 2:1 (two tetrahedral to one octahedral) are called expandables. The montmorillonite has a potential for dyes removal in wastewater due to the high surface area, porosity with excellent cation exchange capacity conferring its adsorbent property. This work aims to use the montmorillonite as an adsorption system in stages to textile decolorization effluent, composed of malachite green dye, reproduced in the laboratory. The characterization of the clay gives high purity and is used as adsorbent of good quality and efficiency. The retention of dyes in the system composed of montmorillonite arranged in separation stages was efficient. The effect of dye concentration and retention time are the most important parameters used in this study. High concentrations and retention time below 24 hours resulted in low levels of removal (25%). On the other hand, the low level of initial concentration increases removal efficiency (57%). Thus, the results obtained in this work allow concluding that montmorillonite is able to removal malachite green dye.

show abstract

“…The properties of thickened ionic liquids have been thoroughly studied by a lot of researchers in the last few years in terms of their application in catalysis, production of membranes and electrochronic materials, lubricants, encapsulation of pharmaceutical preparations, as well as in such devices as actuators and sensors, solar cells, fuel cells, double-layer capacitors, lithium batteries and others. [6][7][8][9][10][11][12][13] However, ionogels remain largely underused because their interphase structure and dynamics have not been studied well yet. 4,[14][15][16] Clay minerals are quite promising in terms of ionogel preparation.…”

Section: Introductionmentioning

confidence: 99%

Cation effects on the properties of halloysite-confined bis(trifluoromethylsulfonyl)imide based ionic liquids

et al. 2021

View full text Add to dashboard Cite

show abstract

Structural effect of imidazolium-type ionic liquid adsorption to montmorillonite

Cited by 29 publications

References 36 publications

Chain‐Elongated Ionic Liquid Electrolytes for Low Self‐Discharge All‐Solid‐State Supercapacitors at High Temperature

Chain‐Elongated Ionic Liquid Electrolytes for Low Self‐Discharge All‐Solid‐State Supercapacitors at High Temperature

Use of Montmorillonite Clay for Adsorption Malachite Green Dye

Cation effects on the properties of halloysite-confined bis(trifluoromethylsulfonyl)imide based ionic liquids

Contact Info

Product

Resources

About