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Influence of g-C3N4 Precursors in g-C3N4/NiTiO3 Composites on Photocatalytic Behavior and the Interconnection between g-C3N4 and NiTiO3
Langmuir ( IF 3.7 ) Pub Date : 2018-10-18 00:00:00 , DOI: 10.1021/acs.langmuir.8b02596 Thanh-Truc Pham 1 , Eun Woo Shin 1
Langmuir ( IF 3.7 ) Pub Date : 2018-10-18 00:00:00 , DOI: 10.1021/acs.langmuir.8b02596 Thanh-Truc Pham 1 , Eun Woo Shin 1
Affiliation
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In this study, composite photocatalysts were produced from NiTiO3 and N2-rich precursors (dicyandiamide, melamine, urea, and thiourea) under N2 flow conditions. The goal of the study was to investigate the interaction between NiTiO3 and the synthesized g-C3N4. The properties of the g-C3N4/NiTiO3 (CNT) composites were different depending on the starting materials. Dicyandiamide and thiourea created strong connections with NiTiO3 and resulted in the generation of Ti–N and Ti–O–S bonds. Urea and melamine, however, had difficulty forming g-C3N4 structures or interconnections with NiTiO3. The Ti–N and Ti–O–S bridges in the composite photocatalysts led to increased photocatalytic activity as well as inhibition of the recombination rate. Additionally, the band diagrams of g-C3N4 prepared from dicyandiamide and thiourea exhibited positions suitable for the Z-scheme charge-transfer model with NiTiO3, implying that the composite photocatalysts were applicable for photocatalytic degradation of organic contaminants under the visible-light irradiation. Higher reaction rate constants for the composites prepared with dicyandiamide and thiourea confirmed the significant role of the Ti–N/Ti–O–S bridge between g-C3N4 and NiTiO3.
中文翻译：
gC 3 N 4 / NiTiO 3复合材料中gC 3 N 4前驱物对光催化行为和gC 3 N 4与NiTiO 3互连的影响
在这项研究中，在N 2流动条件下，由NiTiO 3和富含N 2的前体（双氰胺，三聚氰胺，尿素和硫脲）制得了复合光催化剂。该研究的目的是研究NiTiO 3与合成的gC 3 N 4之间的相互作用。gC 3 N 4 / NiTiO 3（CNT）复合材料的性能取决于起始材料。双氰胺和硫脲与NiTiO 3建立了牢固的连接，并导致生成Ti–N和Ti–O–S键。然而，尿素和三聚氰胺难以形成gC 3 N 4NiTiO 3的结构或互连。复合光催化剂中的Ti–N和Ti–O–S桥导致增加的光催化活性以及抑制重组速率。另外，由双氰胺和硫脲制备的gC 3 N 4的能带图显示了适合NiTiO 3的Z方案电荷转移模型的位置，这表明该复合光催化剂适用于可见光照射下有机污染物的光催化降解。 。用双氰胺和硫脲制备的复合材料的更高的反应速率常数证实了gC 3 N 4和NiTiO之间的Ti–N / Ti–O–S桥的重要作用3。
更新日期：2018-10-18
中文翻译：
gC 3 N 4 / NiTiO 3复合材料中gC 3 N 4前驱物对光催化行为和gC 3 N 4与NiTiO 3互连的影响
在这项研究中，在N 2流动条件下，由NiTiO 3和富含N 2的前体（双氰胺，三聚氰胺，尿素和硫脲）制得了复合光催化剂。该研究的目的是研究NiTiO 3与合成的gC 3 N 4之间的相互作用。gC 3 N 4 / NiTiO 3（CNT）复合材料的性能取决于起始材料。双氰胺和硫脲与NiTiO 3建立了牢固的连接，并导致生成Ti–N和Ti–O–S键。然而，尿素和三聚氰胺难以形成gC 3 N 4NiTiO 3的结构或互连。复合光催化剂中的Ti–N和Ti–O–S桥导致增加的光催化活性以及抑制重组速率。另外，由双氰胺和硫脲制备的gC 3 N 4的能带图显示了适合NiTiO 3的Z方案电荷转移模型的位置，这表明该复合光催化剂适用于可见光照射下有机污染物的光催化降解。 。用双氰胺和硫脲制备的复合材料的更高的反应速率常数证实了gC 3 N 4和NiTiO之间的Ti–N / Ti–O–S桥的重要作用3。
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