The adsorption behavior and mechanism of Cr(VI) on 3D hierarchical α-Fe 2 O 3 structures exposed by (0 0 1) and non-(0 0 1) planes

Liu, Zhong; Yu, Rongmin; Dong, Yaping; Wu, Li; Lv, Baoliang

doi:10.1016/j.cej.2016.10.108

Cited by 68 publications

(20 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Powder XRD patterns of the specimens were obtained on a PANalytical Empyrean diffractometer with Cu Kα radiation. (E %) and the adsorption capacity in equilibrium (qe, mg/g) were calculated using the equations as shown below [22]:…”

Section: Characterization Of Adsorbentsmentioning

confidence: 99%

Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent

Liu

Zhou

Guo

et al. 2019

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Characterization Of Adsorbentsmentioning

confidence: 99%

Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent

Liu

Zhou

Guo

et al. 2019

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The fitted results as shown in Fig. 8(a-b), indicating Li + adsorption process fits well by the Langmuir result from higher R 2 (0.99) than Freundlich model (0.96), implying Li + adsorbed on adsorbent is a monolayer uptake [19]. The relevant parameters in detail as shown in Table 1.…”

Section: Adsorption Isothermsmentioning

confidence: 55%

Surface trace doping of Na enhancing structure stability and adsorption properties of Li1.6Mn1.6O4 for Li+ recovery

Qian

Zhao

Guo

et al. 2021

Separation and Purification Technology

Self Cite

View full text Add to dashboard Cite

Li1.6Mn1.6O4 (LMO) is a dominant adsorbent for lithium recovery from solutions resulted from its high theoretical adsorption uptake and a low loss rate of Mn, which can potentially be further improved by trace doping. We achieve stable cycling and high adsorption capacity of Li1.6Mn1.6O4 from aqueous lithium resources by Na doped (LMO-Na). The Mn dissolution is decreased from 5.4% (bare adsorbent) to 4.4%, and the uptake is increased from 33.5 mg/g to 33.9 mg/g (CLi+: 24 mmol/L). Furthermore, DFT calculations predict that Na replace for Li at 16d sites, result in an enhancement of the Li + adsorption rate and structure stability of LMO. The loss rate of Mn in cycling process is restrained by Na doped, which may result from reducing the content of low valent Mn 3+ and improving the structural stability of material. The effect of Na substitution on adsorption capacity and structure stability is discussed.

show abstract

“…The chemical nature of the pristine SUS current collector is compared with that of the cycling-tested KOH@SUS and H 2 SO 4 @SUS SCs by the XPS spectra in Figure 8. Thus, the Fe 2p spectra in Figure 8A respectively, [34][35][36] and the broadened signals in the H 2 SO 4 @SUS spectrum suggest the dissolution of the surface Fe ions. Similarly, the Cr 2p XPS spectra of the pristine SUS and the cycled KOH@SUS exhibit two major peaks at 576.9 and 586.4 eV (Figure 8B), corresponding to the characteristic binding energies of Cr 2p 3/2 and Cr 2p 1/2 , respectively, while the absence of any signals for the cycled H 2 SO 4 @SUS indicates the dissolution of Cr ions at the surface.…”

Section: Resultsmentioning

confidence: 90%

“…37 Finally, the O 1s spectra in Figure 8C exhibit peaks at 529.5, 531.1, and 532.7 eV corresponding to the presence of O 2À , OH À , and H 2 O, respectively, and a detailed analysis of the O 1s signals is provided in Figure 8D. 36,37 Here, an increase in the proportion of the O 2À state is observed for the SUS current collector with the alkaline (KOH) electrolyte, whereas an increase in the proportion of the OH À state is observed for the acidic (H 2 SO 4 -based) system.…”

Section: Resultsmentioning

confidence: 98%

The rational design and interface engineering of an electrolyte and current collector for a stable and high‐performance aqueous supercapacitor

Park

Lee

2021

Int J Energy Res

View full text Add to dashboard Cite

Characterized by low cost, easy assembly, and excellent ionic properties, the aqueous supercapacitors have been considered promising energy storage devices. However, the absence of any solution for interface engineering between the electrode and electrolyte has been an ongoing performance limitation. Hence, the influence of the electrolyte (KOH and H 2 SO 4 ) and current collector (SUS and graphite) on the electrochemical performance of supercapacitors operating in aqueous electrolytes is examined. Specifically, and for the first time, the outstanding energy-storing performance of an H 2 SO 4 -based acidic system is described, including excellent ionic properties that provide a large number of electroactive sites and enhanced ionic diffusion performance. Further, an improvement in the cycling stability is achieved by using the graphite current collector to enable the prevention of surface oxidation in the presence of the acidic electrolyte. This strategy results in an outstanding electrochemical performance, including a high specific capacity of 238 F g À1 at a current density of 0.1 A g À1 , an excellent high-rate capability, and a remarkable cycling stability of 93% after 3000 cycles. These results suggest that interface engineering using an acidic electrolyte system along with a graphite current collector could be a reasonable strategy for the practical application of aqueous supercapacitors.

show abstract

The adsorption behavior and mechanism of Cr(VI) on 3D hierarchical α-Fe 2 O 3 structures exposed by (0 0 1) and non-(0 0 1) planes

Cited by 68 publications

References 25 publications

Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent

Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent

Surface trace doping of Na enhancing structure stability and adsorption properties of Li1.6Mn1.6O4 for Li+ recovery

The rational design and interface engineering of an electrolyte and current collector for a stable and high‐performance aqueous supercapacitor

Contact Info

Product

Resources

About