| Autor: |
Zhang, Junchang, Su, Feijing, Wen, Peng, Wang, Yawen, Zhao, Bo, Jiang, Lin, Sun, Yinghui |
| Zdroj: |
Energy & Fuels; 20210101, Issue: Preprints |
| Abstrakt: |
Recently, Co2P has been deemed to be a low-cost and fruitful activator for promoting photocatalytic hydrogen (H2) production activity for graphitic carbon nitride (g-C3N4). Nevertheless, almost all reported synthesis methods undergo complex processes and the emission of highly toxic phosphorus gas (PH3). Herein, we present a plain and green method to prepare Co2P/g-C3N4composite through in-situ synthesizing Co2P nanocrystal on g-C3N4nanosheet under coheating treatment. The Co2P/g-C3N4composite is demonstrated to show chemical bonding between Co2P and g-C3N4nanosheet. Interestingly, Co2P/g-C3N4presents 6.3 times enhanced photocatalytic H2yield of 4752 μmol/g/h than that for an individual g-C3N4nanosheet, resulting from an improvement in generating and separating electron and hole pairs by the chemical bonding between Co2P and g-C3N4nanosheet. Notably, the performance exceeds a majority of nonmetal cocatalyst decorated g-C3N4nanosheets. More importantly, this composite photocatalyst shows an excellent cycle stability with only 0.4% decrease in hydrogen evolution rate after four cycles. This article delivers a plain means to synthesize Co2P/g-C3N4composite photocatalyst, easily expanding to other transition metal phosphides. |
| Databáze: |
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