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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
纸质出版日期:2016-2-10,
收稿日期:2015-9-14,
修回日期:2015-9-30,
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苗慧, 夏娟, 金凤等. AgNbO<sub>3</sub>/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 AgNbO<sub>3</sub>/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. AgNbO<sub>3</sub>/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 AgNbO<sub>3</sub>/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.
采用固相法合成AgNbO
3
/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
3
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
3
/石墨烯复合纳米材料的可见光催化性能。结果表明:与纯AgNbO
3
相比
AgNbO
3
/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
3
/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
3
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
2
-
和
h
+
。
AgNbO
3
/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
3
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
3
/graphene nanocomposites under visible light irradiation. Compared with pure AgNbO
3
AgNbO
3
/graphene composites exhibit significantly enhanced photocatalytic activity for MO. Moreover
AgNbO
3
/graphene (2:1) obtained at 300 ℃ exhibits the highest degradation degree of MO after an irradiation of 120 min with apparent
k
app
of 0.034 min
-1
which is about 10 times than that of the pure AgNbO
3
. The tests of radical scavengers confirm that O
2
-
and
h
+
are the main reactive species for the degradation of MO.
固相法AgNbO3/石墨烯纳米材料可见光催化降解甲基橙
solid-state methodAgNbO3/graphene nanocompositesphotocatalysisdegradationmethyl orange
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