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Matching and adjusting energy band structures of Pd-modified sulphides (ZnS, In2S3 and CuS) and improving the photocatalytic activity of CO2 photoreduction.
Nanoscale ( IF 5.8 ) Pub Date : 2020-08-04 , DOI: 10.1039/c9nr10394e Hanbo Li 1 , Tongqing Sun , Lixin Zhang , Yaan Cao
Nanoscale ( IF 5.8 ) Pub Date : 2020-08-04 , DOI: 10.1039/c9nr10394e Hanbo Li 1 , Tongqing Sun , Lixin Zhang , Yaan Cao
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A series of Pd-modified sulphide photocatalysts (ZnS–PdX%, In2S3–PdX% and CuS–PdX%) for the photoreduction of CO2 were synthesised via a simple hydrothermal method. Here, the introduction of the –S–Pd–S– surface species onto the surface of the sulphides extended the visible light absorption, prolonged the lifetime of photogenerated electrons and suppressed the recombination of the photocarriers. Additionally, the match between the band structure and the redox potential for the photoreduction of CO2 was improved. As a result, the photocatalytic activity of ZnS–Pd1.5%, In2S3–Pd1.5% and CuS–Pd1.5% was enhanced when compared with the results from ZnS, In2S3 and CuS photocatalysts. Also, ZnS–Pd1.5%, In2S3–Pd1.5% and CuS–Pd1.5% showed different photocatalytic activities due to differences in the matching relationships between the band structure and the redox potential. In this paper, extensive details on adjusting and matching the energy band structures, as well as viable methods for improving photocatalytic performance, are provided.
中文翻译：
匹配和调整Pd修饰的硫化物（ZnS，In2S3和CuS）的能带结构，并提高CO2光还原的光催化活性。
通过简单的水热法合成了一系列用于光还原CO 2的Pd改性硫化物光催化剂（ZnS–Pd X％，In 2 S 3 –Pd X％和CuS–Pd X％）。在这里，在硫化物表面上引入–S–Pd–S–表面物质可延长可见光的吸收，延长光生电子的寿命，并抑制光载流子的复合。另外，改善了带结构与用于CO 2的光还原的氧化还原电势之间的匹配。结果，ZnS–Pd1.5％，In 2 S 3的光催化活性与ZnS，In 2 S 3和CuS光催化剂的结果相比，-Pd1.5％和CuS-Pd1.5％增强。此外，由于能带结构和氧化还原电位之间的匹配关系不同，ZnS–Pd1.5％，In 2 S 3 –Pd1.5％和CuS–Pd1.5％显示出不同的光催化活性。在本文中，提供了有关调整和匹配能带结构的广泛细节，以及提高光催化性能的可行方法。
更新日期：2020-09-18
中文翻译：
匹配和调整Pd修饰的硫化物（ZnS，In2S3和CuS）的能带结构，并提高CO2光还原的光催化活性。
通过简单的水热法合成了一系列用于光还原CO 2的Pd改性硫化物光催化剂（ZnS–Pd X％，In 2 S 3 –Pd X％和CuS–Pd X％）。在这里，在硫化物表面上引入–S–Pd–S–表面物质可延长可见光的吸收，延长光生电子的寿命，并抑制光载流子的复合。另外，改善了带结构与用于CO 2的光还原的氧化还原电势之间的匹配。结果，ZnS–Pd1.5％，In 2 S 3的光催化活性与ZnS，In 2 S 3和CuS光催化剂的结果相比，-Pd1.5％和CuS-Pd1.5％增强。此外，由于能带结构和氧化还原电位之间的匹配关系不同，ZnS–Pd1.5％，In 2 S 3 –Pd1.5％和CuS–Pd1.5％显示出不同的光催化活性。在本文中，提供了有关调整和匹配能带结构的广泛细节，以及提高光催化性能的可行方法。
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