Synthesis of AgNbO3/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange

MIAO Hui; XIA Juan; JIN Feng; SUN Lin; CUI Yu-min; LI Hui-quan; DING Jian

doi:10.3788/fgxb20163702.0165

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Synthesis of AgNbO₃/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange

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- Synthesis of AgNbO₃/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange
- Chinese Journal of Luminescence Vol. 37, Issue 2, Pages: 165-173(2016)
- 作者机构：
  
  1. 阜阳师范学院化学与材料工程学院,安徽阜阳,236037
  2. 安徽环境污染物降解与监测省级实验室,安徽阜阳,236037
  3. 功能性分子固体省部共建教育部重点实验室,安徽芜湖,241000
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163702.0165
  CLC： O634
- Received：14 September 2015，
  
  Revised：30 September 2015，
  
  Published：10 February 2016
- 稿件说明：
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苗慧, 夏娟, 金凤等. AgNbO3/石墨烯复合材料的合成及其可见光催化甲基橙降解活性[J]. 发光学报, 2016,37(2): 165-173

MIAO Hui, XIA Juan, JIN Feng etc. Synthesis of AgNbO3/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange[J]. Chinese Journal of Luminescence, 2016,37(2): 165-173
苗慧, 夏娟, 金凤等. AgNbO3/石墨烯复合材料的合成及其可见光催化甲基橙降解活性[J]. 发光学报, 2016,37(2): 165-173 DOI： 10.3788/fgxb20163702.0165.

MIAO Hui, XIA Juan, JIN Feng etc. Synthesis of AgNbO3/Graphene Nanocomposites with Highly Visible Light Photocatalytic Activity for Removal of Methyl Orange[J]. Chinese Journal of Luminescence, 2016,37(2): 165-173 DOI： 10.3788/fgxb20163702.0165.

摘要

采用固相法合成AgNbO

/石墨烯复合纳米材料

利用透射电子显微镜(TEM)及紫外-可见漫反射光谱(UV-Vis)对样品的形貌及光学性质进行了表征。研究发现

AgNbO

与石墨烯复合后

带隙能明显降低

吸收光波长范围增大。以甲基橙溶液的降解为光催化模型反应评价了AgNbO

/石墨烯复合纳米材料的可见光催化性能。结果表明:与纯AgNbO

相比

AgNbO

/石墨烯复合纳米材料对甲基橙的可见光催化性能明显增强。实验条件下

经300 ℃煅烧的AgNbO

/石墨烯(2:1)复合纳米材料表现出最优的催化性能

它对甲基橙的可见光催化脱色速率系数约为纯AgNbO

的10倍。光催化降解机理研究表明

促使甲基橙降解脱色的主要活性物种为O

和

。

Abstract

AgNbO

/graphene nanocomposites were synthesized

via

the technique of solid-solid grinding and subsequent sintering process. Surface structures and optical properties of the prepared materials were characterized by transmission electron microscopy and UV-Vis diffuse reflection spectroscopy. The results indicate that band-gap of AgNbO

is lowered upon compositing with graphene nanoparticles

thereby giving an absorption in a large range of wavelengths. Degradation of methyl orange (MO) is carried out to evaluate the photocatalytic activity of AgNbO

/graphene nanocomposites under visible light irradiation. Compared with pure AgNbO

AgNbO

/graphene composites exhibit significantly enhanced photocatalytic activity for MO. Moreover

AgNbO

/graphene (2:1) obtained at 300 ℃ exhibits the highest degradation degree of MO after an irradiation of 120 min with apparent

app

of 0.034 min

-1

which is about 10 times than that of the pure AgNbO

. The tests of radical scavengers confirm that O

and

are the main reactive species for the degradation of MO.

关键词

Keywords

references

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