Kapok fiber modified carbon nitride photocatalytic degradation of organic pollutants

LIU Shuai; LI Xuelei; LI Qimeng; WANG Yanjuan; ZHANG Jian; FENG Ruijiang; HU Shaozheng

doi:10.11949/0438-1157.20200304

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Kapok fiber modified carbon nitride photocatalytic degradation of organic pollutants

Catalysis\, kinetics and reactors | 更新时间：2026-07-24

- Kapok fiber modified carbon nitride photocatalytic degradation of organic pollutants
- CIESC Journal Vol. 71, Issue 12, Pages: 5530-5540(2020)
- 作者机构：
  
  1.辽宁石油化工大学化学化工与环境学部，辽宁抚顺 113001
  2.营口理工学院化学与环境工程系，辽宁营口 115014
  3.辽宁科技大学化学工程学院，辽宁鞍山 114051
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20200304
  CLC： TQ 028.8
- Received：23 March 2020，
  
  Revised：2020-07-18，
  
  Online First：17 December 2020，
  
  Published：05 December 2020
- 稿件说明：
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刘帅, 李学雷, 李启朦, 王彦娟, 张健, 封瑞江, 胡绍争. 木棉纤维改性氮化碳光催化降解有机污染物[J]. 化工学报, 2020, 71(12): 5530-5540

LIU Shuai, LI Xuelei, LI Qimeng, WANG Yanjuan, ZHANG Jian, FENG Ruijiang, HU Shaozheng. Kapok fiber modified carbon nitride photocatalytic degradation of organic pollutants[J]. CIESC Journal, 2020, 71(12): 5530-5540
刘帅, 李学雷, 李启朦, 王彦娟, 张健, 封瑞江, 胡绍争. 木棉纤维改性氮化碳光催化降解有机污染物[J]. 化工学报, 2020, 71(12): 5530-5540 DOI： 10.11949/0438-1157.20200304.

LIU Shuai, LI Xuelei, LI Qimeng, WANG Yanjuan, ZHANG Jian, FENG Ruijiang, HU Shaozheng. Kapok fiber modified carbon nitride photocatalytic degradation of organic pollutants[J]. CIESC Journal, 2020, 71(12): 5530-5540 DOI： 10.11949/0438-1157.20200304.

摘要

采用一步热解法制备了木棉纤维（KF）改性的石墨相氮化碳（g-C

）催化剂，并考察了催化剂光催化降解有机污染物的性能。采用XRD、UV-Vis DRS、FT-IR、TEM、XPS、N

吸附-脱附、PL表征对催化剂进行了结构、形貌、光学性能测试。结果表明，KF改性可以提高催化剂的比表面积，更大的比表面积可以提供更多的活性位点来参与光催化降解过程。UV-Vis DRS结果表明KF改性可以缩小催化剂的禁带宽度，提高催化剂对光能的吸收。在可见光下，KF改性的g-C

基催化剂对苯酚降解速率常数为0.259 h

-1

，是纯g-C

的4.2倍，且具有优异的催化稳定性和结构稳定性。

Abstract

A kapok fiber (KF) modified graphite phase carbon nitride (g-C

) catalyst was prepared by a one-step pyrolysis method

and the photocatalytic degradation of organic pollutants was investigated. The structure and optical properties of KF-CN were characterized by XRD

UV-Vis DRS

TEM

XPS

FT-IR and N

adsorption-desorption. The nitrogen adsorption-desorption isotherm results show that the presence of the mesoporous structure can improve the specific surface area of KF-CN. Elemental analysis characterization indicates the biochar modification is conductive to increase the C/N ratio of KF-CN. The XPS characterization also indicates that the introduction of carbon element can change the chemical environment of N element in the lattice of g-C

and thu

s increases the electron density of N element. The photocatalytic degradation of phenol experiment was carried out to investigate the performance of as-prepared kapok fiber modified graphite carbon nitride photocatalysts by using high-pressure sodium lamp as visible light source. The results show the KF(5%)-CN(600) displayed the highest phenol degradation rate constant of 0.259 h

-1

which is 4.2 times of that of neat g-C

.The activity of KF(5%)-CN(600) does not decrease significantly after 5 cycles

hinting its excellent catalytic stability and structural stability. The possible reaction mechanism was proposed.

关键词

Keywords

references

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