Zr4+ cross-linked chitosan-thiourea composite for efficient detoxification of Cr(VI) ions in aqueous solution

From amorphous to crystalline: a universal strategy for structure regulation of high-entropy transition metal oxides

“…4a), the peaks of Cr 2p 3/2 and Cr 2p 1/2 can be divided into four specific peaks; the peaks at 576.4 eV and 585.8 eV correspond to Cr( iii ), while the peaks at 578.7 eV and 587.5 eV correspond to Cr( vi ). 33,34 The Mn 2p spectrum in Fig. 4b exhibits four peaks deconvoluted to Mn( iii ) and Mn( iv ) at 2p 1/2 of 656.4 eV and 654.2 eV and at 2p 3/2 of 644.3 eV and 641.7 eV, respectively.…”

“…The HRTEM images in different regions in Figure S5b and c to Cr(VI). 33,34 The Mn 2p spectrum in Figure 4b exhibits four peaks deconvoluted to Mn(III) and Mn(IV) at 2p1/2 of 656.4 eV and 654.2 eV and at 2p3/2 of 644.3 eV and 641.7 eV, respectively. 35 The two peaks in Fe 2p spectrum (Figure 4c) can be assigned to Fe(III) 2p1/2 (725.7 eV) and Fe(III) 2p3/2 (711.3 eV).…”

Facile General Injectable Gelatin/Metal/Tea Polyphenol Double Nanonetworks Remodel Wound Microenvironment and Accelerate Healing

“…This indirectly confirms that hydrogen bonding within gelatin is also a non‐negligible force in the construction of Gel/Zr hydrogels (Figure S6 , Supporting Information). In addition, the FTIR spectra of Gel/Zr and Gel/Zr/EGCG5.0 hydrogel included characteristic C─O peaks at 626.5 and 635.1 cm −1 , respectively, [ 31 ] which was attributed to the coordination of the carboxyl group of Gel with Zr 4+ . On adding EGCG to the hydrogels, the polyphenols initially interacted with the protein molecules through hydrophobic interactions and entered a hydrophobic pocket, followed by subsequent multipoint hydrogen bonding.…”

A novel sludge-based biochar composite adsorbent CS/SBC-H3PO4 for efficient Cr(vi) removal from aqueous solution

“…4f) decreases from 46.57% to 22.86%, the C–O content increases from 26.41% to 42.12%, and the CO content increases from 27.02% to 35.01%. This is due to the involvement of O–H in the reduction of Cr( vi ) and the generation of C–O and CO. 31…”