Adsorption, isolated electron/hole transport, and confined catalysis coupling to enhance the photocatalytic degradation performance

Yuan, Junwei; Li, Hua; Wang, Guan; Zhang, Cheng; Wang, Yuxiang; Yang, Linlin; Li, Miaomiao; Lu, Jianmei

doi:10.1016/j.apcatb.2021.120892

Cited by 62 publications

(17 citation statements)

References 46 publications

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“…33 The Mott–Schottky curves showed positive slopes, regardless of the varied frequencies, suggesting typical n-type semiconductor characteristics for both In-MOF materials. 34 The conduction band (CB) potentials of In-TPBD-20 and In-TPBD-50 were determined to be −1.47 V and −1.39 V vs. NHE, respectively (Fig. 2d and e).…”

Section: Resultsmentioning

confidence: 99%

Interpenetrating dye-functionalized indium–organic frameworks for photooxidative cyanation and oxidative cyclization

Hou

Huang

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Interpenetrating dye-functionalized indium–organic frameworks for photooxidative cyanation and oxidative cyclization

Hou

Huang

et al. 2022

J. Mater. Chem. A

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“…During the EPR experiment, hydroxyl radicals and superoxide radicals have no background peaks (signal peaks of the trapping agent) during the test, but background peaks [signal peaks of the trapping agent (2,2,6,6-tetramethylpiperidin-1-yl)oxyl] will appear during the detection of holes. If the material produces holes when illuminated, the signal of the trapping agent will be weakened (combined with the holes) when the light is turned on Figure b shows that there is no significant change in the peak signal of cavities during the detection of cavities in the g-C 3 N 4 /NCDs/Ag material under dark and light conditions, indicating that the material produces few cavities under light.…”

Section: Resultsmentioning

confidence: 99%

“…If the material produces holes when illuminated, the signal of the trapping agent will be weakened (combined with the holes) when the light is turned on. 62 Figure 8b shows that there is no significant change in the peak signal of cavities during the detection of cavities in the g-C 3 N 4 /NCDs/Ag material under dark and light conditions, indicating that the material produces few cavities under light. This is consistent with the results of radical trapping experiments.…”

Section: Acs Applied Nano Materialsmentioning

confidence: 98%

g-C₃N₄/Nitrogen-Doped Carbon Dot/Silver Nanoparticle-Based Ternary Photocatalyst for Water Pollutant Treatment

Wang

Hao

et al. 2023

ACS Appl. Nano Mater.

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The graphitic carbon nitride (g-C3N4)/nitrogen-doped carbon dots (NCDs)/silver (Ag) ternary composite catalysts for organic pollution degradation in aqueous solution were constructed using an interfacial electronic control mechanism with double doping of NCDs and Ag nanoparticles (NPs). NCDs can act as a bridge for electrons to guide the flow of photogenerated charge carriers. The Ag NPs acts as photosensitizers and electron acceptors, enhancing electron transport in the material. With the synergistic effect of NCDs and Ag NPs, the absorption range of the visible spectrum of the g-C3N4/NCDs/Ag catalyst is broadened, the excitation of electrons is enhanced, and the photogenerated electron–hole binding rate is slowed down. The experimental results showed that the degradation of several contaminants [methyl orange (MO), rhodamine B (Rh B), tetracycline hydrochloride, and chrysin hydrochloride] could be achieved within 100 min using a 300 W xenon lamp as the light source (λ > 400 nm). It is very noteworthy that the reaction rates of g-C3N4/NCDs/Ag catalysts for the degradation of MO and Rh B were 13.5 and 12.9 times higher than those of conventional g-C3N4, respectively. NCDs and Ag NPs are uniformly distributed inside the material by inducing g-C3N4 to undergo self-assembly, and thus the g-C3N4/NCDs/Ag catalysts exhibit a stable recycling performance. In addition, •O2 – was confirmed as the main active substance in the photocatalytic process by radical capture experiments and EPR tests, and •OH was used as a secondary site to assist in the photocatalytic degradation process. This design idea of a double-doped modulated g-C3N4 material is expected to be applied in more fields.

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“…[105] The different redox potentials of reactive radical species contribute to revealing the catalytic mechanism, thus indirectly demonstrating the formation of internal electric field. [106] The quenching test is a frequently used strategy to identify reactive species by deciphering the inhibitory degree of different scavengers, where a higher inhibitory degree indicates a more important reactive species. [44] The scavengers of •OH and •SO 4 − are similar, including ethanol, methanol, anisole, benzoic acid, benzene, phenol, nitrobenzene, isopropanol and tert-butanol; hence, it is rather difficult to distinguish the roles of •OH and •SO 4 − in this way.…”

Section: Free Radical Quenchingmentioning

confidence: 99%

Enabling Internal Electric Fields to Enhance Energy and Environmental Catalysis

Chen

Ren

Yuan

2023

Advanced Energy Materials

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Recent years have witnessed an upsurge of interest in exploiting advanced photo‐/electrocatalysts for efficient energy conversion and environmental remediation. Constructing internal electric fields has been highlighted as a rising star to help facilitate various catalytic processes, with the merits of promoting charge transfer/separation, optimizing redox potential and creating effective active/adsorption sites. Internal electric fields are usually formed by the polarization of uneven charge distributions between different constituent layers, which widely exist in piezoelectrics, polar surface terminations, and heterostructure materials. Herein, a groundbreaking and interdisciplinary overview of the latest advances in the construction of internal electric fields to improve photo(electro)catalytic and electrocatalytic activity is provided. This critical review begins with an encyclopedic summary of the classification, advantages, and synthesis strategies of internal electric fields. Subsequently, the identification methods are thoroughly discussed based on the characterization techniques, experiments, and theoretical calculations, which can provide profound guidance for the in‐depth study of internal electric fields. To elaborate the theory–structure–activity relationships for internal electric fields, the corresponding reaction mechanisms, modification strategies, and catalytic performance are jointly discussed, along with a discussion of their practical energy and environmental applications. Finally, an insightful analysis of the challenges and future prospects for internal electric field‐based catalysts are discussed.

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Adsorption, isolated electron/hole transport, and confined catalysis coupling to enhance the photocatalytic degradation performance

Cited by 62 publications

References 46 publications

Interpenetrating dye-functionalized indium–organic frameworks for photooxidative cyanation and oxidative cyclization

Interpenetrating dye-functionalized indium–organic frameworks for photooxidative cyanation and oxidative cyclization

g-C₃N₄/Nitrogen-Doped Carbon Dot/Silver Nanoparticle-Based Ternary Photocatalyst for Water Pollutant Treatment

Enabling Internal Electric Fields to Enhance Energy and Environmental Catalysis

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Adsorption, isolated electron/hole transport, and confined catalysis coupling to enhance the photocatalytic degradation performance

Cited by 62 publications

References 46 publications

Interpenetrating dye-functionalized indium–organic frameworks for photooxidative cyanation and oxidative cyclization

Interpenetrating dye-functionalized indium–organic frameworks for photooxidative cyanation and oxidative cyclization

g-C3N4/Nitrogen-Doped Carbon Dot/Silver Nanoparticle-Based Ternary Photocatalyst for Water Pollutant Treatment

Enabling Internal Electric Fields to Enhance Energy and Environmental Catalysis

Contact Info

Product

Resources

About

g-C₃N₄/Nitrogen-Doped Carbon Dot/Silver Nanoparticle-Based Ternary Photocatalyst for Water Pollutant Treatment