Graphene/graphitic carbon nitride decorated with AgBr to boost photoelectrochemical performance with enhanced catalytic ability
Graphene/graphitic carbon nitride decorated with AgBr to boost photoelectrochemical performance with enhanced catalytic ability
复制标题
AgBr修饰的石墨烯/石墨氮化碳可提高光电化学性能并增强催化能力
DOI：
10.1088/1361-6528/abb48a
复制
发表时间：
2020-10
期刊：
影响因子：
3.5
通讯作者：
胡晓斌
中科院分区：
文献类型：
--
作者：
胡晓斌
在两种半导体（AgBr和石墨碳氮化物）之间建立了一种新型的石墨烯纳米片（GNP）桥，以提高光电化学性能。形成的异质结使整个体系成为z型催化剂。为了构建该催化剂，采用了注射泵方法，并使用了不同的分析技术来确定结构和形态。高角环形暗场（HAADF）、暗场（DF）、DF-4和DF-2技术，利用z -对比现象，确定了异质结构（ABGCN）及其组成。所构建的结构对“急性毒性iii类（MM）”和“iv类（盐酸四环素（TH））”有机污染物具有增强的光电化学和催化性能。通过石墨烯桥的电荷转换，在g-C3N4的导带（CB）上积累了光生电子，在AgBr的价带（VB）上积累了光生空穴，所构建的催化剂在57 min和35 min内降解了MM，降解速率分别为0.01489和0.02387 min−1。离子捕获研究还发现，·O2和h+是积极参与光催化反应的活性物质。
A novel graphene nanoplatelets (GNP) bridge between two semiconductors (AgBr and graphitic carbon nitride) was created to boost photoelectrochemical performance. The heterojunction created makes the whole system a Z-scheme catalyst. For the construction of this catalyst, the syringe pump methodology was adopted and different analytical techniques were used for the confirmation of structure and morphology. High angle annular dark field (HAADF), dark field (DF), DF-4 and DF-2 techniques, using Z-contrast phenomena, confirmed the heterostructure (ABGCN) and its composition. The constructed structure showed an enhanced photoelectrochemical and catalytic property against ‘acute toxicity category-III (MM)’ and ‘category-IV (tetracycline hydrochloride (TH))’ organic pollutants. The constructed catalyst degraded the MM in 57 min and the TH in 35 min with degradation rates of 0.01489 min−1 and 0.02387 min−1, respectively, due to the accumulation of photogenerated electrons on the conduction band (CB) of g-C3N4 and photogenerated holes on the valence band (VB) of AgBr by the transformation of charges through the graphene bridge. An ion trapping study also revealed that ·O2 and h+ were the active species which actively participated in the photocatalytic reaction.
登录
查看更多内容
影响因子：
4.5
作者：
Yang‐Sen Xu;Wei‐De Zhang
通讯作者：
Yang‐Sen Xu;Wei‐De Zhang
WO3/g-C3N4 Z 型异质结上金沉积的实验和 DFT 研究
影响因子：
26.6
作者：
Humayun M;Ullah H;Cao J;Pi W;Yuan Y;Ali S;Tahir AA;Yue P;Khan A;Zheng Z;Fu Q;Luo W
通讯作者：
Luo W
影响因子：
16.6
作者：
Balapanuru, Janardhan;Yang, Jia-Xiang;Loh, Kian Ping
通讯作者：
Loh, Kian Ping
影响因子：
--
作者：
Jinshui Zhang;Xinchen Wang
通讯作者：
Jinshui Zhang;Xinchen Wang
影响因子：
17.1
作者：
Liu, Shaobin;Zeng, Tingying Helen;Chen, Yuan
通讯作者：
Chen, Yuan