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BiOI/Bi2O2CO3 Two-Dimensional Heteronanostructures with Boosting Charge Carrier Separation Behavior and Enhanced Visible-Light Photocatalytic Performance
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-08-19 , DOI: 10.1021/acs.jpcc.0c06833
Tiantian Zhou 1 , Haonan Zhang 1 , Xin Zhang 1 , Wensheng Yang 2 , Yongqiang Cao 1 , Ping Yang 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-08-19 , DOI: 10.1021/acs.jpcc.0c06833
Tiantian Zhou 1 , Haonan Zhang 1 , Xin Zhang 1 , Wensheng Yang 2 , Yongqiang Cao 1 , Ping Yang 1
Affiliation
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BiOI/Bi2O2CO3 two-dimensional (2D) heteronanostructures (HNSs) have been crafted by the simple but effective ion-exchange technique in this work. Besides the routine advantages of pristine 2D materials, including the more surface-reactive sites, larger surface area, and short distance for the carriers to transfer from the material interior to the surface, the larger heterointerface of BiOI/Bi2O2CO3 2D HNSs could further promote the separation of photoinduced electron–hole pairs because of the built-in electric field in the junction, giving rise to their ultrahigh activities compared to the pristine and conventional composite samples. The in situ growth model of 2D HNSs via ion exchange endowed the HNSs with decreased distance of interfacial carrier transfer and energy barrier, together with superhigh structure stability, which was also beneficial to charge separation. The highest apparent rate constants of BiOI/Bi2O2CO3 2D HNSs for visible-light degradation of RhB can reach up to 4.4, 5.3, and 2.8 times (5.1, +∞, and 4.7 times for salicylic acid (SA)) those of pure BiOI, Bi2O2CO3, and conventional BiOI/Bi2O2CO3 complex photocatalysts, respectively. This enhanced charge carrier separation behavior was detailedly born out by the characterizations of photocurrent density, electrochemical impedance, and steady-state and time-resolved photoluminescence, along with selective photo-oxidation/-reduction depositions of metallic oxide and noble metals. Hopefully, BiOI/Bi2O2CO3 2D HNSs can also be applied to photosynthesis, solar cells as well as electrocatalysis and provide a paradigm for exploration in other two-dimensional HNS nanomaterials.
中文翻译：
具有增强的电荷载流子分离行为和增强的可见光光催化性能的BiOI / Bi 2 O 2 CO 3二维异质纳米结构
在这项工作中，BiOI / Bi 2 O 2 CO 3二维（2D）异质纳米结构（HNSs）已通过简单但有效的离子交换技术制成。除了原始2D材料的常规优势（包括更多的表面反应位点，更大的表面积以及较短的载流子从材料内部转移到表面的距离之外），BiOI / Bi 2 O 2 CO 3的较大异质界面二维HNS可以由于结中的内置电场而进一步促进光致电子-空穴对的分离，与原始和常规复合样品相比，它们具有超高的活性。二维HNS通过离子交换的原位生长模型使HNS具有减小的界面载流子转移距离和能垒，以及超高的结构稳定性，这也有利于电荷分离。BiOI / Bi 2 O 2 CO 3 2D HNS对于RhB的可见光降解的最高表观速率常数可以达到4.4、5.3和2.8倍（水杨酸（SA）的5.1，+∞和4.7倍）纯BiOI，Bi 2 O 2 CO 3的那些，和传统的BiOI / Bi 2 O 2 CO 3复合光催化剂。这种增强的载流子分离行为通过光电流密度，电化学阻抗，稳态和时间分辨的光致发光以及金属氧化物和贵金属的选择性光氧化/还原沉积的表征而详细地证实。希望BiOI / Bi 2 O 2 CO 3 2D HNS也可以用于光合作用，太阳能电池以及电催化，并为其他二维HNS纳米材料的探索提供范例。
更新日期：2020-09-18
中文翻译：
具有增强的电荷载流子分离行为和增强的可见光光催化性能的BiOI / Bi 2 O 2 CO 3二维异质纳米结构
在这项工作中，BiOI / Bi 2 O 2 CO 3二维（2D）异质纳米结构（HNSs）已通过简单但有效的离子交换技术制成。除了原始2D材料的常规优势（包括更多的表面反应位点，更大的表面积以及较短的载流子从材料内部转移到表面的距离之外），BiOI / Bi 2 O 2 CO 3的较大异质界面二维HNS可以由于结中的内置电场而进一步促进光致电子-空穴对的分离，与原始和常规复合样品相比，它们具有超高的活性。二维HNS通过离子交换的原位生长模型使HNS具有减小的界面载流子转移距离和能垒，以及超高的结构稳定性，这也有利于电荷分离。BiOI / Bi 2 O 2 CO 3 2D HNS对于RhB的可见光降解的最高表观速率常数可以达到4.4、5.3和2.8倍（水杨酸（SA）的5.1，+∞和4.7倍）纯BiOI，Bi 2 O 2 CO 3的那些，和传统的BiOI / Bi 2 O 2 CO 3复合光催化剂。这种增强的载流子分离行为通过光电流密度，电化学阻抗，稳态和时间分辨的光致发光以及金属氧化物和贵金属的选择性光氧化/还原沉积的表征而详细地证实。希望BiOI / Bi 2 O 2 CO 3 2D HNS也可以用于光合作用，太阳能电池以及电催化，并为其他二维HNS纳米材料的探索提供范例。
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