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学者姓名：郑丹丹
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Abstract ：
Poly(heptazine imide) (PHI), a semicrystalline version of carbon nitride photocatalyst based on heptazine units, has gained significant attention for solar H2 production benefiting from its advantages including molecular synthetic versatility, excellent physicochemical stability and suitable energy band structure to capture visible photons. Typically, PHI is obtained in salt-melt synthesis in the presence of alkali metal chlorides. Herein, we examined the role of binary alkali metal bromides (LiBr/NaBr) with diverse compositions and melting points to rationally modulate the polymerization process, structure, and properties of PHI. Solid characterizations revealed that semicrystalline PHI with a condensed pi-conjugated system and rapid charge separation rates were obtained in the presence of LiBr/NaBr. Accordingly, the apparent quantum yield of hydrogen using the optimized PHI reaches up to 62.3% at 420 nm. The density functional theory calculation shows that the dehydrogenation of the ethylene glycol has a lower energy barrier than the dehydrogenation of the other alcohols from the thermodynamic point of view. This study holds great promise for rational modulation of the structure and properties of conjugated polymeric materials. A new poly(heptazine imide) was synthesized via salt-melt synthesis in binary alkali metal bromides with accelerated carrier transfer and decreased internal structural defects for photocatalytic hydrogen production. image
Keyword ：
crystallinity crystallinity hydrogen evolution hydrogen evolution photocatalysis photocatalysis poly(heptazine imide) poly(heptazine imide) salt-melt synthesis salt-melt synthesis
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| GB/T 7714 | Jin, Yaxuan , Zheng, Dandan , Fang, Zhongpu et al. Salt-melt synthesis of poly(heptazine imide) in binary alkali metal bromides for enhanced visible-light photocatalytic hydrogen production [J]. | INTERDISCIPLINARY MATERIALS , 2024 , 3 (3) : 389-399 . |
| MLA | Jin, Yaxuan et al. "Salt-melt synthesis of poly(heptazine imide) in binary alkali metal bromides for enhanced visible-light photocatalytic hydrogen production" . | INTERDISCIPLINARY MATERIALS 3 . 3 (2024) : 389-399 . |
| APA | Jin, Yaxuan , Zheng, Dandan , Fang, Zhongpu , Pan, Zhiming , Wang, Sibo , Hou, Yidong et al. Salt-melt synthesis of poly(heptazine imide) in binary alkali metal bromides for enhanced visible-light photocatalytic hydrogen production . | INTERDISCIPLINARY MATERIALS , 2024 , 3 (3) , 389-399 . |
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| GB/T 7714 | Zheng, Dandan , Wang, Qian , Pan, Zhiming et al. Poly(triazine imide) nanospheres with spatially exposed prismatic facets for photocatalytic overall water splitting [J]. | SCIENCE CHINA-MATERIALS , 2024 , 67 (6) : 1900-1906 . |
| MLA | Zheng, Dandan et al. "Poly(triazine imide) nanospheres with spatially exposed prismatic facets for photocatalytic overall water splitting" . | SCIENCE CHINA-MATERIALS 67 . 6 (2024) : 1900-1906 . |
| APA | Zheng, Dandan , Wang, Qian , Pan, Zhiming , Wang, Sibo , Hou, Yidong , Zhang, Guigang . Poly(triazine imide) nanospheres with spatially exposed prismatic facets for photocatalytic overall water splitting . | SCIENCE CHINA-MATERIALS , 2024 , 67 (6) , 1900-1906 . |
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Diabetes remains a significant chronic disease, with its prevalence projected to exceed 700 million by 2045. Monitoring glucose levels through conventional methods is crucial for mitigating the associated health risks. In this study, NiTiO3 films are loaded on TiO2 nanorods to create photoanodes, which are applied for glucose detection using near-infrared (NIR) light illumination. This approach achieved a detection limit of 0.01 mM with selectivity reaching up to 95%. Additionally, the long-term stability was confirmed for at least 16 weeks. This study demonstrates the potential of using NiTiO3-based nanomaterials as an NIR-driven sensor for glucose detection. © 2024 American Chemical Society.
Keyword ：
Glucose sensors Glucose sensors Infrared detectors Infrared detectors Nanoribbons Nanoribbons Nanorods Nanorods Titanium dioxide Titanium dioxide
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| GB/T 7714 | Wu, Yahan , Zhang, Jiaqi , Zhao, Shun et al. Integration of NiTiO3 Films onto TiO2 Nanorods as Photoanodes for Glucose Detection with Near-Infrared Light [J]. | ACS Applied Nano Materials , 2024 , 7 (19) : 22684-22693 . |
| MLA | Wu, Yahan et al. "Integration of NiTiO3 Films onto TiO2 Nanorods as Photoanodes for Glucose Detection with Near-Infrared Light" . | ACS Applied Nano Materials 7 . 19 (2024) : 22684-22693 . |
| APA | Wu, Yahan , Zhang, Jiaqi , Zhao, Shun , Li, Yueping , Cai, Pingru , Zheng, Dandan et al. Integration of NiTiO3 Films onto TiO2 Nanorods as Photoanodes for Glucose Detection with Near-Infrared Light . | ACS Applied Nano Materials , 2024 , 7 (19) , 22684-22693 . |
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Polymeric carbon nitride has been widely developed as a promising photocatalyst for solar hydrogen production via photocatalytic water splitting. However, pristine carbon nitride prepared by traditional solid-state polymerization usually encounters issues such as rapid carrier recombination and insufficient absorption of visible light below 460 nm. Herein, poly(heptazine imide) with a distinctive nanoplate structure was synthesized in a binary molten salt of NaCl-CaCl2. The salt template allows the formation of the thin nanoplate structure, which promotes the charge separation and migration. Besides, the intercalation of Ca2+ ions between the conjugated layers endows the activation of n-pi* electron transition due to the distortion of in-plane heptazine layers. Accordingly, the optimized poly(heptazine imide) nanoplates achieve an apparent quantum efficiency of up to 17.3% at 500 nm for photocatalytic hydrogen production from water. This work shares new idea for rational control of the optical absorption and charge carrier dynamics of poly(heptazine imide).
Keyword ：
hydrogen production hydrogen production ion intercalation ion intercalation nanoplates nanoplates photocatalysis photocatalysis poly heptazine imide poly heptazine imide
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| GB/T 7714 | Zou, Yanmin , Li, Shiyao , Zheng, Dandan et al. Extended light absorption and accelerated charge migration in ultrathin twisted carbon nitride nanoplates for efficient solar hydrogen production [J]. | SCIENCE CHINA-CHEMISTRY , 2024 , 67 (7) : 2215-2223 . |
| MLA | Zou, Yanmin et al. "Extended light absorption and accelerated charge migration in ultrathin twisted carbon nitride nanoplates for efficient solar hydrogen production" . | SCIENCE CHINA-CHEMISTRY 67 . 7 (2024) : 2215-2223 . |
| APA | Zou, Yanmin , Li, Shiyao , Zheng, Dandan , Feng, Jianyong , Wang, Sibo , Hou, Yidong et al. Extended light absorption and accelerated charge migration in ultrathin twisted carbon nitride nanoplates for efficient solar hydrogen production . | SCIENCE CHINA-CHEMISTRY , 2024 , 67 (7) , 2215-2223 . |
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Surface functionalization has been considered as an effective strategy to manipulate charge separation of carbon nitride and therefore to largely improve the photocatalytic H 2 evolution efficiency. Poly heptazine imide (PHI) is a new class of crystalline carbon nitride frameworks that exhibits remarkable photocatalytic performance for hydrogen evolution. To further improve the H 2 evolution performance of PHI and explore the reaction mechanism, ammonium thiocyanate was used as a precursor for the synthesis of poly heptazine imide at elevated temperatures under molten salt conditions. The optimized PHI with an abundance of surface cyano groups shows a significantly enhanced photocatalytic performance for H 2 evolution, which is 4.3 times that on pristine PCN. Most importantly, the surface cyano group adjusts the electron intensity of the polymeric framework, enhances the light absorbance, reduces the bandgap, and improves the charge separation efficiency. The synthetic technique also could be applied to other sulfur -containing precursors for the synthesis of PHI frameworks with excellent hydrogen evolution production performance.
Keyword ：
Ammonium thiocyanate Ammonium thiocyanate Cyano group Cyano group Hydrogen evolution Hydrogen evolution Photocatalysis Photocatalysis Poly heptazine imide Poly heptazine imide
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| GB/T 7714 | Zhang, Yuhan , Yang, Zhenchun , Zheng, Dandan et al. Surface cyano groups optimize the charge transfer of poly heptazine imide for enhanced photocatalytic H 2 evolution [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 69 : 372-380 . |
| MLA | Zhang, Yuhan et al. "Surface cyano groups optimize the charge transfer of poly heptazine imide for enhanced photocatalytic H 2 evolution" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 69 (2024) : 372-380 . |
| APA | Zhang, Yuhan , Yang, Zhenchun , Zheng, Dandan , Wang, Sibo , Hou, Yidong , Anpo, Masakazu et al. Surface cyano groups optimize the charge transfer of poly heptazine imide for enhanced photocatalytic H 2 evolution . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 69 , 372-380 . |
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Sunlight -induced photocatalytic carbon dioxide (CO2) reduction to energy -rich chemicals by metal -free polymeric carbon nitride (CN) semiconductor is a promising tactic for sustained solar fuel production. However, the reaction efficiency of CO2 photoreduction is restrained seriously by the rapid recombination of photogenerated carriers on CN polymer. Herein, we incorporate 2-aminopyridine molecule with strong electron -withdrawing group into the skeleton edge of CN layers through a facile one -pot thermal polymerization strategy using urea as the precursor, which renders a modified carbon nitride (ACN) with extended optical harvesting, abundant nitrogen defects and ultrathin nanosheet structure. Consequently, the ACN photocatalyst with desirable structural features attains enhanced separation and migration of photoexcited charge carriers. Under visible light irradiation with Co(bpy)32+ as a cocatalyst, the optimized ACN sample manifests a high CO2 deoxygnative reduction activity and high stability, providing a CO yielding rate of 17 mu mol h-1, which is significantly higher than that of pristine CN. The key intermediates engaged in CO2 photoreduction reaction are determined by the in situ diffuse reflectance infrared Fourier transform spectroscopy, which sponsors the construction of the possible photocatalytic CO2 reduction mechanism on ACN nanosheets.
Keyword ：
Carbon nitride Carbon nitride CO2 reduction CO2 reduction Nanosheets Nanosheets Nitrogen defects Nitrogen defects Photocatalysis Photocatalysis
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| GB/T 7714 | Zhou, Ziruo , Guo, Wenyu , Yang, Tingyu et al. Defect and nanostructure engineering of polymeric carbon nitride for visible-light-driven CO2 reduction [J]. | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY , 2024 , 43 (3) . |
| MLA | Zhou, Ziruo et al. "Defect and nanostructure engineering of polymeric carbon nitride for visible-light-driven CO2 reduction" . | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY 43 . 3 (2024) . |
| APA | Zhou, Ziruo , Guo, Wenyu , Yang, Tingyu , Zheng, Dandan , Fang, Yuanxing , Lin, Xiahui et al. Defect and nanostructure engineering of polymeric carbon nitride for visible-light-driven CO2 reduction . | CHINESE JOURNAL OF STRUCTURAL CHEMISTRY , 2024 , 43 (3) . |
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Hydrogen peroxide (H2O2) plays a crucial role in various applications, such as green oxidation processes and the production of high-quality fuels. Currently, H2O2 is primarily manufactured using the indirect anthraquinone method, known for its significant energy consumption and the generation of intensive by-products. Extensive research has been conducted on the photocatalytic production of H(2)O(2)via oxygen reduction reaction (ORR), with polymeric carbon nitride (PCN) emerging as a promising catalyst for this conversion. This review article is organized around two approaches. The first part main consists of the chemical optimization of the PCN structure, while the second focuses on the physical integration of PCN with other functional materials. The objective is to clarify the correlation between the physicochemical properties of PCN photocatalysts and their effectiveness in H2O2 production. Through a thorough review and analysis of the findings, this article seeks to stimulate new insights and achievements, not only in the domain of H2O2 production via ORR but also in other redox reactions.
Keyword ：
H2O2 H2O2 Hybrid structure Hybrid structure Oxygen reduction reaction Oxygen reduction reaction Photocatalysis Photocatalysis Polymeric carbon nitride Polymeric carbon nitride
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| GB/T 7714 | Zheng, Dandan , Wu, Yahan , Yang, Xintuo et al. Developing Polymeric Carbon Nitrides for Photocatalytic H2O2 Production [J]. | CHEMSUSCHEM , 2024 . |
| MLA | Zheng, Dandan et al. "Developing Polymeric Carbon Nitrides for Photocatalytic H2O2 Production" . | CHEMSUSCHEM (2024) . |
| APA | Zheng, Dandan , Wu, Yahan , Yang, Xintuo , Wang, Sibo , Fang, Yuanxing . Developing Polymeric Carbon Nitrides for Photocatalytic H2O2 Production . | CHEMSUSCHEM , 2024 . |
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Sunlight-induced photocatalytic carbon dioxide(CO2)reduction to energy-rich chemicals by metal-free polymeric carbon nitride(CN)semiconductor is a promising tactic for sustained solar fuel production.However,the reaction efficiency of CO2 photoreduction is restrained seriously by the rapid recombination of photogenerated carriers on CN polymer.Herein,we incorporate 2-aminopyridine molecule with strong electron-withdrawing group into the skeleton edge of CN layers through a facile one-pot thermal polymerization strategy using urea as the precursor,which renders a modified carbon nitride(ACN)with extended optical harvesting,abundant nitrogen defects and ultrathin nanosheet structure.Consequently,the ACN photocatalyst with desirable structural features attains enhanced separation and migration of photoexcited charge carriers.Under visible light irradiation with Co(bpy)32+as a cocatalyst,the optimized ACN sample manifests a high CO2 deoxygnative reduction activity and high sta-bility,providing a CO yielding rate of 17 μmol h-1,which is significantly higher than that of pristine CN.The key intermediates engaged in CO2 photoreduction reaction are determined by the in situ diffuse reflectance infrared Fourier transform spectroscopy,which sponsors the construction of the possible photocatalytic CO2 reduction mechanism on ACN nanosheets.
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| GB/T 7714 | Ziruo Zhou , Wenyu Guo , Tingyu Yang et al. Defect and nanostructure engineering of polymeric carbon nitride for visible-light-driven CO2 reduction [J]. | 结构化学 , 2024 , 43 (3) : 10-18 . |
| MLA | Ziruo Zhou et al. "Defect and nanostructure engineering of polymeric carbon nitride for visible-light-driven CO2 reduction" . | 结构化学 43 . 3 (2024) : 10-18 . |
| APA | Ziruo Zhou , Wenyu Guo , Tingyu Yang , Dandan Zheng , Yuanxing Fang , Xiahui Lin et al. Defect and nanostructure engineering of polymeric carbon nitride for visible-light-driven CO2 reduction . | 结构化学 , 2024 , 43 (3) , 10-18 . |
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In situ photo-deposition of both Pt and CoOx cocatalysts on the facets of poly (triazine imide) (PTI) crystals has been developed for photocatalytic overall water splitting. However, the undesired backward reaction (i.e., water formation) on the noble Pt surface is a spontaneously down-hill process, which restricts their efficiency to run the overall water splitting reaction. Herein, we demonstrate that the efficiency for photocatalytic overall water splitting could be largely promoted by the decoration of Rh/Cr2O3 and CoOx as H-2 and O-2 evolution cocatalysts, respectively. Results reveal that the dual cocatalysts greatly extract charges from bulk to surface, while the Rh/Cr2O3 cocatalyst dramatically restrains the backward reaction, achieving an apparent quantum efficiency (AQE) of 20.2 % for the photocatalytic overall water splitting reaction.
Keyword ：
Charge Carriers Charge Carriers Cocatalysts Cocatalysts Overall Water Splitting Overall Water Splitting Photocatalysis Photocatalysis Poly (Triazine Imide) Poly (Triazine Imide)
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| GB/T 7714 | Liu, Minghui , Zhang, Guigang , Liang, Xiaocong et al. Rh/Cr2O3 and CoOx Cocatalysts for Efficient Photocatalytic Water Splitting by Poly (Triazine Imide) Crystals [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2023 , 62 (37) . |
| MLA | Liu, Minghui et al. "Rh/Cr2O3 and CoOx Cocatalysts for Efficient Photocatalytic Water Splitting by Poly (Triazine Imide) Crystals" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 62 . 37 (2023) . |
| APA | Liu, Minghui , Zhang, Guigang , Liang, Xiaocong , Pan, Zhiming , Zheng, Dandan , Wang, Sibo et al. Rh/Cr2O3 and CoOx Cocatalysts for Efficient Photocatalytic Water Splitting by Poly (Triazine Imide) Crystals . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2023 , 62 (37) . |
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Broadening the visible light absorption range and accelerating the separation and migration process of charge carriers are effective ways to improve photocatalytic quantum efficiencies. In this study, we show that poly heptazine imides with enhanced optical absorption and promoted charge carrier separation and migration could be obtained by means of a rational design of the band structures and crystallinity of polymeric carbon nitride. Copolymerization of urea with monomers such as 2-aminothiophene-3-carbonitrile would first generate amorphous melon with enhanced optical absorption, while further ionothermal treatment of melon in eutectic salts would increase the polymerization degree and create condensed poly heptazine imides as final products. Accordingly, the optimized poly heptazine imide presents an apparent quantum yield of 12 % at 420 nm for photocatalytic hydrogen production.
Keyword ：
charge separation charge separation optical absorption optical absorption photocatalysis photocatalysis poly heptazine imide poly heptazine imide solar hydrogen production solar hydrogen production
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| GB/T 7714 | Chang, Mengling , Pan, Zhiming , Zheng, Dandan et al. Salt-Melt Synthesis of Poly Heptazine Imides with Enhanced Optical Absorption for Photocatalytic Hydrogen Production [J]. | CHEMSUSCHEM , 2023 , 16 (13) . |
| MLA | Chang, Mengling et al. "Salt-Melt Synthesis of Poly Heptazine Imides with Enhanced Optical Absorption for Photocatalytic Hydrogen Production" . | CHEMSUSCHEM 16 . 13 (2023) . |
| APA | Chang, Mengling , Pan, Zhiming , Zheng, Dandan , Wang, Sibo , Zhang, Guigang , Anpo, Masakazu et al. Salt-Melt Synthesis of Poly Heptazine Imides with Enhanced Optical Absorption for Photocatalytic Hydrogen Production . | CHEMSUSCHEM , 2023 , 16 (13) . |
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