类石墨烯氮化碳纳米片的合成与光催化降解有机污染物的性能研究文献综述

 2022-10-25 11:08:09

文献综述(或调研报告):

类石墨烯氮化碳纳米片的合成与光催化降解有机污染物的性能研究

潘韩 12015309

摘要

石墨相氮化碳(g-C3N4)是类似于石墨的非金属片层结构材料,具有良好的热稳定性、化学稳定性,且能带结构合适,在可见光照射下可以光解水或是光催化降解有机污染物,能够广泛应用在光催化领域。但是它仍然存在一些缺点,例如光谱吸收范围窄、比表面积小、光生电子-空穴对复合率高等,影响其光催化性能。所以考虑使用改性方法改善其光催化性能。目前有许多方法可制备g-C3N4纳米材料,但或多或少存在合成效率率、反应速度慢、工艺难度大、产物性能差和产率低等问题。而高能微波辐照法以其加热速度快、选择性高、产物性能好及节能环保等优点成为目前制备g-C3N4纳米材料常用的方法之一。

关键词微波法;石墨相氮化碳;纳米片;二维材料;光催化剂;有机污染物

Abstract

Graphic carbon nitride(g-C3N4) is a kind of non-metal sheet structure material similar to graphite. It has good thermal stability, chemical stability and suitable energy band structure. It can photoelectrolyze water or organic pollutants under visible light irradiation, which can be widely used in the field of photocatalysis.However, it still has some disadvantages, such as narrow spectral absorption range, small specific surface area, and high photoelectron - hole recombination rate, which affect its photocatalytic performance Therefore, the modification method is considered to improve its photocatalytic performance. At present, there are many methods to prepare g-C3N4 nanomaterials, but there are more or less problems such as synthesis efficiency, slow reaction speed, difficult process, poor product performance and low yield.High energy microwave irradiation has become one of the common methods to prepare g-C3N4 nanomaterials.

Keywords: Microwave heating method; g-C3N4 Nanosheets; Two-dimensional materials; Photocatalysts; Organic pollutants

  1. 选题背景

自工业革命以来,人类就开始大量使用化石能源,而化石能源的大量消耗则带来了全球的能源危机和环境污染等问题,例如大气污染、水体污染等。对于水体污染而言,造纸废水、染料废水、化工废水、有机废水等都属于较难处理的工业废水,不仅对生态环境造成严重影响,且其中含有的生物毒性大的染料具有潜在的致癌性,处理不当会危害人类及其它生物的健康。处理污染废水的传统方法有物理法、化学法以及生物法,但是这些方法存在成本高、去除效率低、会产生二次污染等缺点,因此我们需要寻找一种更绿色、环保、经济、高效的处理污染废水的方法。

剩余内容已隐藏,您需要先支付 10元 才能查看该篇文章全部内容!立即支付

以上是毕业论文文献综述,课题毕业论文、任务书、外文翻译、程序设计、图纸设计等资料可联系客服协助查找。