One-Step Construction of Multi-Walled CNTs Loaded with Alpha-Fe2O3 Nanoparticles for Efficient Photocatalytic Properties

Abstract

The aggregation and the rapid restructuring of the photoinduced electron−hole pairs restructuring in the process of photoelectric response remains a great challenge. In this study, a kind of Multi-walled carbon nanotubes loaded Alpha-Fe2O3 (CNTs/α-Fe2O3) heterostructure composite is successfully prepared via the one-step method. Due to the synergistic effect in the as-prepared CNTs/α-Fe2O3, the defect sites and oxygen-containing functional groups of CNTs can dramatically improve the interface charge separation efficiency and prevent the aggregation of α-Fe2O3. The improved photocurrent and enhanced hole–electron separation rate in the CNTs/α-Fe2O3 is obtained, and the narrower band gap is measured to be 2.8 ev with intensive visible-light absorption performance. Thus, the CNTs/α-Fe2O3 composite serves as an excellent visible light photocatalyst and exhibits an outstanding photocatalytic activity for the cationic dye degradation of rhodamine B (RhB). This research supplies a fresh application area forα-Fe2O3 photocatalyst and initiates a new approach for design of high efficiency photocatalytic materials.

Synthesis and Characterization of MWCNT-COOH/Fe3O4 and CNT-COOH/Fe3O4/NiO Nanocomposites: Assessment of Adsorption and Photocatalytic Performance

“…Collectively, our results demonstrated that MWCNT-COOH/Fe 3 O 4 and MWCNT-COOH/Fe 3 O 4 /NiO nanocomposites exhibited greatly improved photocatalytic activity on the degradation of dyes. The advanced photocatalytic performances were attributed to improved photocurrents and enhanced hole-electron separation rates, due to the combination of MWCNT with metallic oxides [ 51 , 52 ]. This result may be associated with the balance of synergistic effects between MWCNTs and the semiconductor character of Fe 3 O 4 .…”

Highly Efficient SnIn4S8@ZnO Z-Scheme Heterojunction Photocatalyst for Methylene Blue Photodegradation

“…With the rapid development of human society, the problem of pollution is becoming more and more serious, and people have adopted many methods to deal with this problem [1][2][3]. Photocatalytic technology, as a new low-consumption, renewable and non-secondary solution to pollution problems, has received extensive attention from researchers [4][5][6][7][8]. Through the continuous efforts of researchers, photocatalytic materials have been greatly expanded, including oxides and sulfides such as ZnO, CdS, NiCo 2 O 4 and CuInS 2 [9][10][11][12], perovskite such as CsPbCl 3 [13], graphite-like phase g-C 3 N 4 [14], monoelemental red phosphorus [15], and so on.…”