Aloe vera assisted facile green synthesis of reduced graphene oxide for electrochemical and dye removal applications

Abstract

In the present work, the suitability of Aloe vera (AV) as a ‘green reducing agent’ has been investigated for the reduction of graphene oxide (GO).

Real-time monitored photocatalytic activity and electrochemical performance of an rGO/Pt nanocomposite synthesizedviaa green approach

“…6a). 21 The observed I a values for the rGO/Pt1, rGO/Pt2, rGO/ Pt3 and rGO/Pt4-modied gold electrodes are 1.44, 1.58, 1.82 and 2.02 mA, respectively. The increase in I a for the nanocomposites is due to the incorporation of Pt metal nanoparticles on the surface of rGO, which may increase the surface area of the nanocomposites.…”

“…Particularly, the broad peak at 3334 cm À1 corresponding to the hydroxyl functional group shows a decrease in intensity, indicating the reduction of GO by aqueous honey. 21 The crystalline structure of the synthesized rGO/Pt4 nanocomposite was observed through XRD patterns. Fig.…”

“…20 Although this method is simple, it has some inherent limitations, such as high cost and the usage of highly toxic reagents, including hydrazine, dimethylhydrazine and NaBH 4 ; these can generate adverse effects on the environment, which restricts the potential use of the nanocomposites in practical applications. [21][22][23][24] To overcome these limitations, recently, various eco-friendly synthesis routes have been explored as a new class of methods for the synthesis of graphene or graphene-based nanocomposites. In particular, green reagents such as plant extracts, bovine serum albumin, vitamin C, and caffeic acid have been used to reduce graphene oxide (GO) to reduced graphene oxide (rGO) or graphene.…”

“…In particular, green reagents such as plant extracts, bovine serum albumin, vitamin C, and caffeic acid have been used to reduce graphene oxide (GO) to reduced graphene oxide (rGO) or graphene. 21,[25][26][27][28] Moreover, in our previous study, we successfully demonstrated a simple method for the preparation of rGO using honey as a reducing agent, where the presence of monosaccharide sugars such as glucose and fructose played an important role in the reduction process. Although various reports are available for the reduction of GObased nanocomposites using green reagents, it is still a challenging task; also, in situ green synthesis methods of rGO-based nanocomposites for real applications are needed.…”

A Novel Strategy for Sustainable Synthesis of Soluble‐Graphene by a Herb Delphinium denudatum Root Extract for Use as Light‐Weight Supercapacitors

“…The use of common reducing agents like sodium borohydride (NaBH 4 ), and hydrazine hydrate (HH) are not advisable as they are hazardous being toxic to the environment . Alternatively, several green and environmentally benign reducing agents were investigated for the production of graphene‐like bovine serum albumin, reducing sugar, heparin, wild carrot roots, ascorbic acid or Vitamin‐C, Tea polyphenols, aloe vera, vancomycin, etc. But the results show poor C/O ratio.…”