2D/2D Bismuthene Heterojunction

99.8% in 2 min

A 2D/2D heterojunction of bismuthene and BiOCl, with a stronger internal electric field that suppresses carrier recombination for broadband photocatalytic degradation.

Jingtao, Su · Shaohua, Hu · Minfeng, Meng · Zhang, Liang · Kaiwen, Liu · Miao, Yuqing · An, Yarui · Gu, Yingying

Journal of Photochemistry and Photobiology A: Chemistry 2026

Specifications

Rhodamine B degradation

{'zh': '99.8', 'en': '99.8'} %

Rate constant enhancement

{'zh': '16.4', 'en': '16.4'} times

Indigo carmine degradation

{'zh': '96.5', 'en': '96.5'} %

Ofloxacin degradation

{'zh': '98.2', 'en': '98.2'} %

Tetracycline degradation

{'zh': '88.4', 'en': '88.4'} %

Reusability

{'zh': '95.0', 'en': '95.0'} %

Advantages

Degrades orders of magnitude faster

The reaction rate constant is 16.4 and 11.2 times higher than BiOCl and bulk Bi/BiOCl, respectively, degrading 99.8% of Rhodamine B within 2 minutes.

Broad-spectrum pollutant degradation

Efficiently degrades both dyes (Rhodamine B, indigo carmine) and antibiotics (ofloxacin, tetracycline), with up to 98.2% degradation within 10 minutes.

Stable over repeated cycles

Retains 95.0% of its degradation efficiency after five consecutive cycles.

Enhanced charge separation via IEF

DFT calculations confirm a stronger internal electric field than bulk Bi/BiOCl, facilitating charge separation and suppressing carrier recombination.

Applications

• Dye Degradation：Rapidly decomposes dyes in textile wastewater, reducing color and toxicity.
• Antibiotic Removal：Degrades antibiotic residues in water, reducing resistance risks.
• Water Treatment：Used as photocatalyst in advanced wastewater treatment to remove refractory organics.