Page 104 - 《精细化工》2022年第4期

·740· 精细化工 FINE CHEMICALS 第 39 卷

组，再负载 MoS 2 又进一步降低了 CdS 中电子-空穴
对的复合。因此，所制备的 CdS/RGO/ MoS 2 复合材
料光催化剂在可见光降解有机物领域和环境保护与
应用等方面是很有前途的材料。

参考文献：
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图 8 光催化降解 MO 的机理示意图 synergistic effect or plasmonic effect[J]. Applied Catalysis B:
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Fig. 8 Mechanism diagram of photocatalytic degradation [4] ALI I, GUPTA V K. Advances in water treatment by adsorption
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[5] QIU P X, YAO J H, CHEN H, et al. Enhanced visible-light photocatalytic
由图 8 可见，首先，CdS 吸收可见光后，在价带 decomposition of 2,4-dichlorophenoxyacetic acid over ZnIn 2S 4/g-C 3N 4
photocatalyst[J]. Journal of Hazardous Materials, 2016, 317:158-168.
–
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（VB=1.58 eV） 上产生电子（e ），电子吸收能量跃 [6] SUN Y G (孙亚光), ZHANG H Y (张含烟), MING T (明涛), et al.
迁到导带（CB= 0.72 eV） [26] 上，助催化剂 RGO 捕 Synthesis of ZnIn 2S 4/g-C 3N 4 nanocomposites with efficient photocatalytic
H 2 generation activity by a simple hydrothermal method[J]. Chem J
获电子，再转移到更低导带位置的 MoS 2 上（CB=0.65 Chinese Universities (高等学校化学学报), 2021,42 (10): 3160-3166.
eV） [26] ，空穴留在 CdS 的价带上，实现电子-空穴 [7] GAO Y, XU B T, CHERIF M，et al. Atomic insights for Ag interstitial/
substitutional doping into ZnIn 2S 4 nanoplates and intimate coupling
对的快速分离，从而抑制了 CdS 光催化剂吸收可见 with reduced graphene oxide for enhanced photocatalytic hydrogen
光时产生的电子-空穴对的快速复合，由此更多的电 production by water splitting[J]. Applied Catalysis B: Environmental,
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子能够参与到光催化剂降解 MO 的过程中。MoS 2
– ZnIn 2S 4 nanocomposites for the high-performance conversion of
导带上的电子可以与半导体表面的氧气反应形成·O 2
sunlight energy into hydrogen fuel and the meaningful reduction of
+
对有机物进行降解。而留在 CdS 价带上的 h 是良好 pollution[J]. RSC Advances, 2020, 10 (54): 32652-32661.
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的氧化剂可以氧化吸附在半导体表面的有机物达到 photoreactivity of MOF ultrathin nanosheets towards hydrogen
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–
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生载流子的有效分离，使得更多的光生载流子参与 119690.
催化反应。并且复合材料形成时的费米能级拉平效 [11] WANG X, MAEDA K, THOMAS A, et al. A metal-free polymeric
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应能够促进不同半导体之间载流子电子的扩散和转 light[J]. Nature Materials, 2009, 8(1): 76-80.
移，从而有效提高催化活性 [25-27] 。 [12] LI S S, SUN J R, GUAN J Q. Strategies to improve electrocatalytic
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通过简单的水热法成功合成 CdS/RGO/MoS 2 复 Chinese Physics B, 2017, 26(8): 086501.
合材料。该制备方法成本低廉，操作简便且可控。 [14] COLINA-RUIZ R A, TOLENTINO-HERNANDEZ R V, GUARNEROS-
AGUILAR C, et al. Chemical bonding and electronic structure in
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离，从而显著提高催化剂的可见光降解 MO 速率和 carrier separation of CdS/MoS 2 via micro-potential of Mo microsheet
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是纯 CdS 和 MoS 2 的 11.3 倍和 18.6 倍。通过对催化 nanohybrid with energetic visible-light response for degradation of
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机理进行分析，可以推测出光催化效率增强的原因： [17] TANG Y J, WANG Y, WANG X L, et al. Molybdenum disulfide/
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interlayer spacing for electrocatalytic hydrogen evolution[J].
一方面，RGO 作为电子受体和转运体在光催化材料 Advanced Energy Materials, 2016, 6(12): 1600116.

中能很好地传输电子，从而抑制光生电子-空穴的重 （下转第 768 页）