Molybdenum‐based heterogeneous catalysts for the control of environmental pollutants

Abstract

Molybdenum (Mo)‐based materials with abundant electronic properties have been extensively studied in terms of environmental pollutant control. In photocatalysis, thermal catalysis, electrocatalysis, Fenton or Fenton‐like reactions, and other technical means, the properties of different Mo‐based materials have been fully exerted. In this review, the latest developments in Mo‐based materials in the control of water and air pollutants are summarized. In addition, possible methods are discussed to enhance the activity of Mo‐based materials to provide the direction for the design of highly efficient Mo‐based catalysts in the future.

Magnetically Separable Mesoporous Fe3O4@g-C3N4 as a Multifunctional Material for Metallic Ion Adsorption, Oil Removal from the Aqueous Phase, Photocatalysis, and Efficient Synergistic Photoactivated Fenton Reaction

“… The free radical quenching experiment also indicates that • OH radicals play a major role in the heterogeneous photoactivated Fenton reaction (see Figure S5). The schematic diagram of the reaction mechanism is shown in Scheme . Efficient cycling of Fe 2+ and Fe 3+ in MPG-C 3 N 4 /Fe 3 O 4 /NH 2 greatly improves its efficiency toward degradation, preventing the recombination of photogenerated electrons and holes. − Thus, MPG-C 3 N 4 /Fe 3 O 4 /NH 2 is able to do both the tasks. This research provides a new approach for the development of multifunctional graphite phase carbon nitride composite. − …”

Synthesis and characterization of MoxFe1−xO nanocomposites for the ultra-fast degradation of methylene blue via a Fenton-like process: a green approach

“…The conversion of Fe( iii )/Fe( ii ) may be accelerated due to the presence of molybdenum. Mo( iv ) can provide electrons for the conversion and get converted into Mo( vi ) (eqn (8)), 65 and the degradation process is thus enhanced. Singlet oxygen ( 1 O 2 ) can also be produced from ˙OH (eqn (9)).…”

Emerging Graphene Derivatives and Analogues for Efficient Energy Electrocatalysis

“…[18,37] It is noteworthy that the advantages of graphene in electrocatalysis to a large extent origin from its atomic-thick 2D nature and concomitant properties; meanwhile, the discovery and application of graphene materials have inspired the rapid and fruitful development of a rich family of 2D materials (Figure 1c), such as graphitic carbon nitride (g-C 3 N 4 ), hexagonal boron nitride (h-BN), 2D transition-metal dichalcogenides (TMDs), transition-metal carbides/nitrides (MXenes), layered metal oxides/hydroxides, layered metal-organic frameworks (MOFs), and 2D covalent-organic frameworks (COFs). [17,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] These 2D graphene analogues have provided more opportunities to regulate the electrocatalytic activity and selectivity with distinctive active sites and various engineering strategies. [17,56] Moreover, through the fabrication of van der Waals (vdW) heterostructures between these 2D materials including graphene and its analogues, their advantages can be combined and the electrocatalytic performance can be further improved.…”