Effective visible-light catalysis triggered by the orbital coupling and carrier transfer in α-phase phthalocyanine/graphene oxide van der Waals heterostructure
Effective visible-light catalysis triggered by the orbital coupling and carrier transfer in α-phase phthalocyanine/graphene oxide van der Waals heterostructure
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α相酞菁/氧化石墨烯范德华异质结构中的轨道耦合和载流子转移触发有效的可见光催化
DOI：
10.1016/j.cej.2022.134998
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发表时间：
2022-05
影响因子：
15.1
通讯作者：
Qiaohui Fan
中科院分区：
文献类型：
--
作者：
Jianjun Liang;Zhuanhong Lu;Zhe Ding;Wentao Zhang;Yuqiang Li;Jie Yu;Yun Wang;Ping Li;Qiaohui Fan
氧化石墨烯（GO）在光电材料中的应用受到载流子分离和迁移率低以及可见光利用率低的限制。在本研究中，我们提出了一个策略，以克服这些缺点，通过制作货车德瓦耳斯异质结。通过α-酞菁（α-H2 Pc）与GO在水中的简单组装，制备了目标异质结构Pc-GO。在α-H_2Pc的π轨道和GO的价带之间存在能量简并，这是H_2Pc光生电子向GO转移的通道。有趣的是，随着H2 Pc层的减少，电子转移变得更加显著。因此，异质结构的费米能级被工程化。光谱技术和电化学方法也证明了载流子的快速迁移。基于这些优点，在没有任何电子/空穴牺牲或额外脱气的情况下，通过Pc-GO实现了As（III）的有效光催化解毒，平均反应速率为0.68 mg g-1h-1。特别是在可见光范围内，Pc-GO表现出优异的光催化活性，与全光谱相比，其活性保持了53.1%。Pc-GO经A4打印纸包裹后仍保持22%的光催化性能，这对Pc-GO在天然浑水中的实际应用至关重要。此外，Pc-GO的可见光催化被证明与独特的α-H2 Pc堆叠相关。该工作扩展了As（III）修复材料的制备策略，并有望通过改变二维半导体的排列来设计器件的光电性能。
The application of graphene oxide (GO) in the photoelectronic materials are greatly restricted by the ineffective carrier separation and mobility, as well as the poor utilization of visible light. In this study, a strategy is proposed to overcome these disadvantages via the fabrication of van der Waals heterostructure. The target heterostructure, Pc-GO, is prepared by the simple assembly of α-phase phthalocyanine (α-H2Pc) and GO in water. The energy degeneration is observed between π orbital of α-H2Pc and valence band of GO, which acts as the channel for transferring the photogenerated electrons from H2Pc to GO. Interestingly, electron transfer becomes more remarkable with the decreasing H2Pc layers. The Fermi level of the heterostructure is thus engineered. Fast mobility of carriers is also demonstrated by the spectroscopic technologies and electrochemical methods. Based on these advantages, the effective photocatalytic detoxication of As(III) is realized by Pc-GO without any electrons/holes sacrifices or additional degassing, and the average reaction rate is 0.68 mg g-1h−1. Especially, Pc-GO suggests an excellent photocatalytic activitty in the range of visible light, and 53.1% of the activity is maintained in contrast to that under the full spectrum. Pc-GO even remains 22 % of photocatalytic property after wrapped by a A4 printing paper, which is essential for the practical application of Pc-GO in natural muddy water. Moreover, the visible-light catalysis of Pc-GO is demonstrated to correlate with the unique α-H2Pc stacks. This work extends the preparation strategies of As(III) remediation materials, and promises a possible method to engineer the photoelectric properties of the device via changing the arrangement of two-dimensional semiconductor.
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高度不对称酞菁作为石墨碳氮化物的敏化剂，可在近红外光下极其高效地光催化制氢
影响因子：
12.9
作者：
Zhang, Xiaohu;Yu, Lijuan;Zhuang, Chuangsheng;Peng, Tianyou;Li, Renjie;Li, Xingguo
通讯作者：
Li, Xingguo
DOI：
10.1021/acs.langmuir.0c02370
发表时间：
2020-10
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
T. R. B. Ramakrishna;M. Mathesh;Zhen Liu;Chunmei Zhang;A. Du;Jingquan Liu;C. Barrow;Min Chen;M. Biggs;Wenrong Yang
通讯作者：
T. R. B. Ramakrishna;M. Mathesh;Zhen Liu;Chunmei Zhang;A. Du;Jingquan Liu;C. Barrow;Min Chen;M. Biggs;Wenrong Yang
影响因子：
4.4
作者：
Alfredsson, Y;Brena, B;Siegbahn, H
通讯作者：
Siegbahn, H
影响因子：
29.4
作者：
Jang, Ji-Soo;Jung, Hong Ju;Kim, Il-Doo
通讯作者：
Kim, Il-Doo
影响因子：
4.4
作者：
E. Ortí;J. Brédas
通讯作者：
E. Ortí;J. Brédas