Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange

Abstract

A novel Co3O4–Ag catalyst covered on the Ni foam substrate was synthesized via facile hydrothermal and in situ photoreduction methods for the efficient degradation of methyl orange.

Synthesis of a visible-light-driven Ag2O–Co3O4 Z-scheme photocatalyst for enhanced photodegradation of a reactive yellow dye

“…The results confirmed that Co 3 O 4 absorbs radiation in the visible light region due to O 2− → Co 2+ and O 2− → Co 3+ charge transfers. 54–56 The absorption edge of Co 3 O 4 was determined as 605 nm as given in Fig. 2.…”

“…64 65 Therefore, Ag 2 O-Co 3 O 4 exhibited higher catalytic performance than bare Co 3 O 4 . 54,66,67 The scavenging experiments were also performed for verification of the proposed mechanism. EDTA and isopropanol were employed as scavengers for positive holes and hydroxyl radicals, respectively.…”

Optimized h‐BN/Sb2WO6 Interface Mediates an Efficient Charge Separation towards Enhanced Photocatalysis

“…[7][8][9][10] Usual physical, chemical, and biological methods can remove dyes from wastewater but are economically nonviable, less efficient, and generate secondary waste products. [11][12][13][14][15][16] However, semiconductor-based photocatalysis driven by sunlight offers an efficient degradation of dyes preferably producing CO 2 and H 2 O as the end-products. [17][18][19][20] Visible light-driven semiconductors (VLDS) are the important solar energy receptive materials that have been exploited for the photocatalysis process in general.…”

“…The major contributor to the water degradation are the dyes emanating from textile processing, leather tanning, paper production, food processing, and hair colorings . Usual physical, chemical, and biological methods can remove dyes from wastewater but are economically non‐viable, less efficient, and generate secondary waste products . However, semiconductor‐based photocatalysis driven by sunlight offers an efficient degradation of dyes preferably producing CO 2 and H 2 O as the end‐products .…”

NiCo2O4/g‐C3N4 Heterojunction Photocatalyst for Efficient H2 Generation

“…As water is the only by-product after combustion, hydrogen energy presents one of the most effective ways to solve the problems of environmental pollution and lack of energy. [1][2][3] In 1972, after the Japanese scientist Fujisjima discovered that TiO 2 produces H 2 by the photolysis of water, photocatalytic H 2 production technology has received widespread attention. [4] At present, many semiconductor photocatalysts are used for H 2 production from water splitting, such as TiO 2 , [5,6] WO 3 , [7,8] CdS, [9,10] MoS 2 , [11,12] and g-C 3 N 4 .…”