A review on fabricating heterostructures from layered double hydroxides for enhanced photocatalytic activities

Abstract

LDH is a controllable 2D material for fabricating heterostructures with another semiconductor.

Modification of Layered Double Hydroxides Using First-Row Transition Metals for Superior UV-Vis-NIR Absorption and the Influence of the Synthesis Method Used

“…• Contrary to the popular usage of Zn-based or Zn-containing LDHs for photo-applications [3][4][5] , the UV absorption band of the MgAl-LDH was severely reduced upon Zn modification for all substitution amounts in the CP samples. In contrast, the samples prepared using UH showed increased UV absorption, albeit small.…”

“…LDHs are a class of anionic clays with the general formula [M describes the composition of the anionic interlayer, X represents the interlayer anion with charge q, and x is the molar fraction of trivalent cations to total metal cations in the layer structure. 1 While LDHs find many applications, some of the most interesting properties of these materials include their capability to interact with light, leading to applications as UV-stabilisers in polymers 2 , as photocatalysts 3 for applications in water-splitting (hydrogen generation and oxygen evolution) [4][5][6] , CO 2 reduction 5 and pollutant degradation 6 , as photoelectrochemical electrodes 4 , and in photovoltaics 7 . Because of their structure and composition, these materials are often referred to as semi-conducting materials and have been tested as electrocatalysts 4,8,9 , supercapacitors 4,7,9 and sensors 10,11 .…”

“…However, there remain shortcomings in the understanding of the material properties on their performance, specifically with respect to composition, surface area, crystal structure and morphology. 3,6 To make the application of photo-active materials viable for renewable energy applications, interaction with the full (or at least a large part of the) solar spectrum is vital. Design of LDHs capable of absorbing in the ultraviolet (UV) and visible (Vis) range has, thus, been a focus in the field for a long time.…”

Ag2CO3 Decorating BiOCOOH Microspheres with Enhanced Full-Spectrum Photocatalytic Activity for the Degradation of Toxic Pollutants

“…However, the wide band gap ( E g = 3.4 eV) of BiOCOOH severely restrains its practical application. Actually, the combination of wide band gap semiconductors with narrow band gap compounds can remarkably enhance the photocatalytic performance, due to expanded sunlight absorption and the accelerated separation of charge carriers [14,15,16,17,18]. For instance, Aguirre et al have recently employed Cu 2 O coated by TiO 2 for improving photocatalytic stability and performance [16].…”

Layered double alkoxides a novel group of layered double hydroxides without water content

“…Many scholars are working in this field, and this a broad one, spanning from intense research concerning the synthesis, modification and structural characterization of LDHs [1][2][3][4][5][6], through many applications like vehicles of medically important compounds [7][8][9] or polymer additives [10] to catalysis serving as catalysts either in their pristine layered forms [11][12][13][14][15] treatment forming mixed oxides with many vacancies [16][17][18][19][20][21][22][23].…”