▎ 摘　　要

NOVELTY - Graphene-based nanosheet array composite supported palladium cluster catalyst (I) are new. The obtained catalyst has hierarchical nanosheet-type array morphology, and the calcination atmosphere is nitrogen. Composite metal oxide nanosheets were grown vertically on both sides of the reduced graphene oxide sheet, and palladium nanocluster with size of 1.3-1.8 nm were highly dispersed at the edge of the composite metal oxide nanosheets. USE - Used as graphene-based nanosheet array composite supported palladium cluster catalyst. ADVANTAGE - The method: has excellent catalytic reduction of nitro compounds and degradation of organic dyes; and adopts simple chemical reduction method. DETAILED DESCRIPTION - Graphene-based nanosheet array composite supported palladium cluster catalyst of formula (x-PdNCs/M1M2(O)/rGO-T) (I) are new. The obtained catalyst has hierarchical nanosheet-type array morphology, and the calcination atmosphere is nitrogen. Composite metal oxide (M1M2(O)) nanosheets were grown vertically on both sides of the reduced graphene oxide (rGO) sheet, and palladium nanocluster (PdNCs) with size of 1.3-1.8 nm were highly dispersed at the edge of the composite metal oxide (M1M2(O)) nanosheets. x = mass loading of 0.1-0.5 wt.% Pd; M1M2(O) = composite metal oxide obtained by topological transformation of layered double hydroxide precursor; M1 = Ni2+, Co2+ or Mg2+ divalent metal cations; M2 = Al3+ or Ce3+ trivalent metal cations; M1:M2 = 3:1; rGO = reduced graphene oxide; and T = calcination temperature (250-320degrees Celsius). An INDEPENDENT CLAIM is also included for preparation of (I).