改性石墨相氮化碳的制备与光催化性能研究

改性石墨相氮化碳的制备与光催化性

能探究

摘要：

本文探究了改性石墨相氮化碳的制备与光催化性能。起首通过改变含铁酸盐的前驱体比例来合成不同浓度的铁掺杂石墨烯氮化碳材料，然后接受氨基硅油原位水解-缩合的方法在材料表

面进行硅改性。接下来，通过控制溶剂的类型和离子强度，制备了不同形貌的石墨相氮化碳。最后，将改性后的铁掺杂石墨烯氮化碳材料和不同形貌的石墨相氮化碳进行光催化性能测试。

结果表明，在紫外光照耀下，改性后的铁掺杂石墨烯氮化碳材料表现出更好的光催化活性和稳定性，其表面硅改性有助于增强光吸纳能力，而铁掺杂则增加了活性位点的数量。此外，当溶剂为甲醇时，制备的石墨相氮化碳表面遮盖了更多的碳球状纳米颗粒，从而有效提高了光催化活性。

关键词：改性石墨相氮化碳，铁掺杂，硅改性，光催化性能，甲醇

Abstract:

In this paper, the preparation and photocatalytic

performance of modified graphene-like nitrogen-doped carbon materials were studied. Firstly, different concentrations of iron-doped graphene nitrogen carbon materials were synthesized by changing the precursor ratio containing iron salt, and then the silicon modification was carried out on the surface of the material by aminoalkylsiloxane in situ hydrolysis-condensation method. Then, by controlling the type of solvent and ionic strength, different morphologies of graphene-like nitrogen-doped carbon were prepared. Finally, the modified iron-doped graphene nitrogen carbon materials and graphene-like nitrogen-doped carbon with different morphologies were tested for photocatalytic performance.

The results showed that under UV irradiation, the modified iron-doped graphene nitrogen carbon material showed better photocatalytic activity and stability. The surface silicon modification enhanced the light absorption capacity and the iron doping increased the number of active sites. In addition, when the solvent was methanol, more carbon spherical nanoparticles were covered on the surface of the prepared graphite-like nitrogen-doped carbon, which effectively improved the photocatalytic activity.

Keywords: modified graphene-like nitrogen-doped carbon,

iron doping, silicon modification, photocatalytic performance, methanol。

The modified graphene-like nitrogen-doped carbon materials showed improved photocatalytic performance due to the presence of silicon and iron. Silicon modification enhanced the absorption capacity of light and iron doping increased the number of active sites

on the surface of the material. The combination of these two modifications led to a synergistic effect, enhancing the photocatalytic activity.

When the solvent used for preparation was methanol,

the carbon spherical nanoparticles were more

effectively covered on the surface of the material, further improving the photocatalytic activity. This indicates that the solvent used in the preparation process also plays a significant role in shaping the morphology and the properties of the materials.

The results of this study can potentially contribute

to the development of efficient photocatalytic materials for environmental remediation and energy conversion applications. The modified graphene-like nitrogen-doped carbon materials possess high stability, durability, and enhanced photocatalytic efficiency, making them excellent candidates for various catalytic