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A strategyfor preparation of Fe2O3/g-C3N4composites with efficient visible-light photocatalytic activity

XUEWANG ZHU1, XUEJIA TIAN1, RONG YIN1, QINGZHI LUO1, JING AN1, XUEYAN LI1, DESONG WANG1,2,*

Affiliation

  1. School of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, People’s Republic of China
  2. Metastable Materials Science and Technology State Key Laboratory, Yanshan University, Qinhuangdao, 066004, People’s Republic ofChina

Abstract

A new strategy was developed for preparing Fe2O3/graphitic carbon nitride (Fe2O3/g-C3N4) composites exhibiting greatly promoted photocatalytic active under the condition of visible light. Ferric chloride solution was added into melamine solution with pH value of 2.0 at 90 °C, the solution was cooled to room temperature to prepare re-crystallized melamine containing a little Fe(III) compounds. The re-crystallized melamine underwent heating process at 550 °Cfor 2 h to prepare Fe2O3/g-C3N4composites. The as-prepared composites were analyzed through XPS, XRD, SEM, FT-IR. The photocatalytic active conditionof Fe2O3/g-C3N4was researched by photodegradation of Rhodamine B as irradiated by visible light. The facilitated absorption of light and significant photo-generated electron andholeseparation were realized through Fe2O3loading. The photocatalytic activity of Fe2O3/g-C3N4first increased and decreased as Fe2O3content increased. The Fe2O3/g-C3N4with Fe(III) compounds loading of 0.1 wt% exhibited the optimal photoactivity. The apparent rate constants of Fe2O3/g-C3N4composites were almost 12.1 times than pure g-C3N4. The Fe2O3/g-C3N4demonstrated noticeable stability and reusability..

Keywords

Photocatalyst, Fe2O3,g-C3N4, Visible-light photocatalysis, Composites.

Submitted at: Nov. 16, 2019
Accepted at: Oct. 22, 2020

Citation

XUEWANG ZHU, XUEJIA TIAN, RONG YIN, QINGZHI LUO, JING AN, XUEYAN LI, DESONG WANG, A strategyfor preparation of Fe2O3/g-C3N4composites with efficient visible-light photocatalytic activity, Journal of Optoelectronics and Advanced Materials Vol. 22, Iss. 9-10, pp. 536-547 (2020)