Design of a One-Dimensional Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> Composite Material and Its Photocathodic Protection Mechanism Against Corrosion
Z-scheme Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> nanocomposites were prepared by electrospinning and hydrothermal methods, and their photocathodic protection performance was studied on 304 SS and Q235 CS in N...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/15/6/958 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Z-scheme Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> nanocomposites were prepared by electrospinning and hydrothermal methods, and their photocathodic protection performance was studied on 304 SS and Q235 CS in NaCl solution (3.5 wt.%). The two-dimensional Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub> loaded on the one-dimensional NiFe<sub>2</sub>O<sub>4</sub> resulted in faster electron migration and enhanced light absorption capability. Moreover, it had been observed through electrochemical testing that the assembly of Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> heterojunctions improves the efficacy of photocathodic protection. Following illumination, the self-corrosion potentials of 304 SS and Q235 CS coupled with Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> nanocomposites decreased by 1040 mV and 560 mV, and the photoinduced current densities were 1.2 times and 3.9 times greater than the value of Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>. Furthermore, the mechanism of enhanced photocathodic protection performance for Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> heterojunctions was systematically discussed. XPS and ESR analysis indicated that Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub> composites follow the Z-scheme electron migration path and retain the stronger reduction and oxidation capacity of Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/NiFe<sub>2</sub>O<sub>4</sub>. Therefore, the Z-scheme heterostructures are responsible for the realization of cathodic protection for carbon steel. |
|---|---|
| ISSN: | 2075-5309 |