Calcined ZnTi‐Layered Double Hydroxide Intercalated with H₃PW₁₂O₄₀ with Efficiently Photocatalytic and Adsorption Performances

Abstract

Wastewater treatment is of great significance to environmental remediation. The exploration of efficient and stable methods for wastewater treatment is still a challenging issue. Herein, a heterojunction material with photocatalysis and adsorption properties has been designed to remove the complex pollutants from wastewater. The heterojunction material (ZnO/TiO 2 À PW 12 , PW 12 = [PW 12 O 40 ] 3À ) was synthesized by calcining the ZnTiÀ layered double hydroxide (ZnTi-LDH) intercalated with the Keggin-type polyoxometalate H 3 PW 12 O 40 . In the construction of ZnO/TiO 2 À PW 12 it was found that the polyanionic PW 12 remained unchanged in the process of forming the proposed heterojunction. The photochemical properties verify that heterojunction synergistic with PW 12 facilitated the separation of photoproduced electron-hole pairs and thus suppressed the recombination. Therefore, ZnO/TiO 2 À PW 12 exhibits excellent photocatalytic property, and the efficiency of Cr(VI) photoreduction reached more than 90 % in the first 3 min. Furthermore, the electrostatic force between the PW 12 and cationic dyes makes ZnO/ TiO 2 À PW 12 having an outstanding adsorption performance for cationic dyes, such as rhodamine B, crystal violet and methyl blue. Such heterojunction material combined with polyoxometalate puts forward new insights for the design of functional materials for water treatment with low cost and high efficiency.

Strategies towards High Performance Lithium‐Sulfur Batteries

“…Functional interlayers are inserted into LSBs to inhibit the shuttle of LiPSs, provide a Li-ion mobility channel, promote the LiPSs redox kinetics, and ultimately improve active materials utilization and cycling performance. [145] Several multifunctional interlayers are constructed from various nanostructure carbon materials such as porous carbons, [146] CNT, [147] carbon nanofibers (CNF), [148] graphene, [149] and graphene oxides. [150] Nanostructure carbon-based interlayers serve as a physical barrier to limit the diffusion of soluble higher-order LiPSs into the anode side.…”

Efficient and Sustainable in situ Photo‐Fenton Reaction to Remove Phenolic Pollutants by NH2‐MIL‐101(Fe)/Ti3C2Tx Schottky‐Heterojunctions

“…[7] To date, semiconductor materials in photocatalysis have been increasingly researched, including TiO 2 , [8] CdS, [9] BiVO 4 , [10] Ag 3 PO 4 , [11] g-C 3 N 4 , [12] ZnIn 2 S 4 , [13] LDHs. [14] These photocatalysts perform considerable photocatalytic activity in the removal of pollutants from wastewater, but they are still limited by low photochemical activity. Hence, the development of photocatalyst semiconductors with high specific surface area, strength light stability, and high-efficiency separation of photogenerated carriers is still a research hotspot for environmental good application.…”

“…Semiconductor photocatalysts are considered as an advisable visible‐light actuated photocatalyst due to its the broad spectral absorption region, diverse structure, low toxicity and easy‐to‐adjust photoelectric characteristics [7] . To date, semiconductor materials in photocatalysis have been increasingly researched, including TiO 2 , [8] CdS, [9] BiVO 4 , [10] Ag 3 PO 4 , [11] g‐C 3 N 4 , [12] ZnIn 2 S 4 , [13] LDHs [14] . These photocatalysts perform considerable photocatalytic activity in the removal of pollutants from wastewater, but they are still limited by low photochemical activity.…”

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

“…Therefore, removing dyes from the wastewater before releasing is a tough issue. Multitudinous technologies such as biodegradation, chemical oxidation, enzymatic degradation, photocatalytic degradation, electrocatalytic oxidation, Fenton treatment, flocculation and adsorption have been developed to remove dyes from wastewater [29,31–39] . Among them, adsorption method is widely used because of its inexpensiveness, simplicity, eco‐friendliness, and high efficiency.…”