Abstract
In this work, we successfully exfoliated MgCr-(NO3−) LDH with large purity by a simple formamide method followed by post-hydrothermal treatment and characterized by different physico-chemical techniques. The UV-DRS study persuades the red-shifted absorption band and suitable band gap of MgCr-(NO3−) LDH for optimum light harvestation ability related to the optical properties. Alternatively, the production of elevated photocurrent density of MgCr-(NO3−) LDH (3:1, 80 °C) in the anodic direction was verified by the LSV study, which further revealed their effective charge separation efficacy. These MgCr-LDH nanosheets (3:1, 80 °C) displayed the superior Rhodamine B (RhB) degradation efficiency of 95.0% at 0.80 kW/m2 solar light intensity in 2 h. The tremendous catalytic performances of MgCr-LDH (3:1, 80 °C) were typically linked with the formation of surface-active sites for the charge trapping process due to the presence of uncoordinated metallocenters during the exfoliation process. Furthermore, the maximum amount of the active free atoms at the edges of the hexagonal platelet of MgCr-LDH causes severance of the nanosheets, which generates house of platelets of particle size ~20–50 nm for light harvestation, promoting easy charge separation and catalytic efficiency. In addition, radical quenching tests revealed that h+ and •OH play as major active species responsible for the RhB degradation.
Highlights
Layered structure material represents an emerging class of two-dimensional (2D)materials that acquire sheet-like morphology with the thickness of single or few-layered atoms [1,2,3]
The present work is related to reference [7], and our aim was to promote the exfoliation of MgCr-layered double hydroxide (LDH) (Mg(II): Cr(III) = 2:1, 3:1, and 4:1) using the formamide method followed by post-hydrothermal treatment (70, 80, and 90 ◦ C)
Our thorough investigations on MgCr-(NO3 − ) LDH disclosed the exfoliation capability of MgCr-(NO3 − ) LDH in formamide into uni/multi-layer NS, which strongly depended on layer charge (Mg2+ /Cr3+ = 2:1, 3:1, and 4:1) and hydrothermal temperature (70, 80, and 90 ◦ C)
Summary
Layered structure material represents an emerging class of two-dimensional (2D)materials that acquire sheet-like morphology with the thickness of single or few-layered atoms [1,2,3]. The importance of layered materials is credited due to their rich interlayer chemistry, such as intercalation and ion exchange properties, which modified their electronic and optical properties. There are lot of many-layered solid materials with few-layer, single-layer, or stacked-layered structures that have been identified as such layered double hydroxide (LDH) [3,4,5,6,7,8,9], layered metal hydroxides [10], layered graphene oxide [4,9], and layered graphitic carbon nitride (g-C3 N4 ) [11,12,13,14], in photocatalytic dye degradation and energy conversion reactions. LDHs represents a group of anionic layered materials consisting of positively charged layers with interlayer anions and H2 O molecules for charge recompense, which is widely used as catalysts, catalyst support, ion exchangers, and electrocatalytic and photocatalytic materials [5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
