
1. 江西省科学院能源研究所
2. 江西省碳中和研究中心 3. 江西省碳中和技术创新中心
Published:2022
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许西威, 陈小平. Research Progress of Heterojunction Photocatalysts[J]. 2022, (4): 78-84.
许西威, 陈小平. Research Progress of Heterojunction Photocatalysts[J]. 2022, (4): 78-84. DOI: 10.16056/j.2096-7705.2022.04.013.
光催化氧化技术具有合成过程简便、反应条件易控制、充分利用太阳能且无二次污染等其他水处理技术无可比拟的优点,在处理环境污染问题和缓解全球能源短缺等方面的应用前景越来越广阔。但大多数光催化剂会面临光生载流子快速复合、可见光吸收范围窄、低效的氧化还原能力等方面的限制。因此,研究人员对光催化剂进行了诸多方面的改性,其中,多个半导体耦合形成异质结是提高光生载流子分离效率以及光催化活性的有效手段。在此,论述了国内外异质结型光催化剂的研究进展,重点分析了Ⅱ型、传统Z型、全固态Z型、直接Z型、S型这几种具有代表性的异质结光催化剂,对其各自特点、作用原理以及局限性进行讨论。并提出未来新型S型异质结可通过调整RP和OP的费米能级、助催化剂修饰、形态工程与界面调节等手段进一步提高光催化性能和拓宽应用范围。
Photocatalytic oxidation technology has incomparable advantages over other water treatment technologies
such as simple synthesis process
easy control of reaction conditions
full use of clean energy and solar energy
and no secondary pollution. It has an increasingly broad application prospect in dealing with environmental pollution and alleviating global energy shortage. However
most photocatalysts are limited by the rapid recombination of photogenerated carriers
narrow visible light absorption range
and inefficient redox ability. Therefore
researchers have modified photocatalysts in many aspects. Among them
the coupling of multiple semiconductors to form heterojunctions is an effective means to improve the separation efficiency of photogenerated carriers and the photocatalytic activity. In this paper
the research progress of heterojunction photocatalysts at home and abroad is reviewed
focusing on the analysis of several representative heterojunction photocatalysts: Ⅱ-scheme
traditional Z-scheme
all-solid-state Z-scheme
direct Z-scheme
and S-scheme
and their respective characteristics
principles of action
and limitations are discussed. In the future
the new S-scheme heterojunction can further improve the photocatalytic performance and broaden the application range by adjusting the Fermi level of RP and OP
cocatalyst modification
morphological engineering and interface regulation.
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