Design, synthesis and application of new iron-based cockscomb-like photocatalyst for high effectively degrading water contaminant under sunlight

Yang, Siwei; Sun, Qiang; Shen, Yingqiang; Hong, Yixin; Tu, Xuewei; Chen, Yutong; Zheng, Hui

doi:10.1016/j.apsusc.2020.146559

Cited by 18 publications

(4 citation statements)

References 62 publications

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“…It is revealed that the •O 2 − is the leading active species responsible for enhancing photodegradation reaction for ternary composites. Whereas, both •O 2 − and •OH are the main ROS in the case of g-C 3 N 4 / Fe 3 O 4 /ZnO NCs as reported by Raha et al [172] and Yang et al [173]. Compared to different wideband gap semiconductor NCs (table 3), g-C 3 N 4 /Fe 3 O 4 /ZnO nanocomposite shows relatively higher degradation efficiency.…”

Section: Fementioning

confidence: 59%

Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Das

Chowdhury

2021

Nanotechnology

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Heterogeneous photocatalysis premised on advanced oxidation processes has witnessed a broad application perspective, including water purification and environmental remediation. In particular, the graphitic carbon nitride (g-C3N4), an earth-abundant metal-free conjugated polymer, has acquired extensive application scope and interdisciplinary consideration owing to its outstanding structural and physicochemical properties. However, several issues such as the high recombination rate of the photo-generated electron–hole pairs, smaller specific surface area, and lower electrical conductivity curtail the catalytic efficacy of bulk g-C3N4. Another challenging task is separating the catalyst from the reaction medium, limiting their reusability and practical applications. Therefore, several methodologies are adopted strategically to tackle these issues. Attention is being paid, especially to the magnetic nanocomposites (NCs) based catalysts to enhance efficiency and proficient reusability property. This review summarizes the latest progress related to the design and development of magnetic g-C3N4-based NCs and their utilization in photocatalytic systems. The usefulness of the semiconductor heterojunctions on the catalytic activity, working mechanism, and degradation of pollutants are discussed in detail. The major challenges and prospects of using magnetic g-C3N4-based NCs for photocatalytic applications are highlighted in this report.

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Section: Fementioning

confidence: 59%

Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Das

Chowdhury

2021

Nanotechnology

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“…The results of PCN/Sn/SnO compare with those of the other systems [58][59][60][61][62][63][64][65][66][67][68][69]. Table S2 shows the recent works on the photocatalytic degradation of RhB by g-C 3 N 4 based photocatalysts.…”

Section: Photocatalytic Activitymentioning

confidence: 94%

Sn-bridge type-Ⅱ PCN/Sn/SnO heterojunction with enhanced photocatalytic activity

Chen¹,

Tang²,

Wang³

et al. 2020

Semicond. Sci. Technol.

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The porous g-C3N4 (PCN)/Sn/SnO ternary type-II heterojunction photocatalyst was synthesized by simple heat treatment combined with photodeposition. The results of a series of characterizations displayed that, with an electronic bridge structure, the type-II heterojunction photocatalyst has been successfully prepared. In the presence of PCN/Sn/SnO, RhB was degraded entirely in 40 min, and the conversion and selectivity of benzylamine oxidative reaction reached 99.9% within 6 h. The enhanced photocatalytic activity of PCN/Sn/SnO is attributed to high specific surface area and the metallic Sn0 acting as electron bridges at the interface between SnO and PCN, which can accelerate the speed of photogenerated electrons transmission and inhibit recombination of photogenerated electron-hole pairs. After five cycles of operation, PCN/Sn/SnO maintained high photocatalytic activity. A reasonable photocatalytic reaction pathway was proposed via the free radical quenching test and mechanism analysis.

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“…However, the photocatalytic activity of pristine PCN is currently unsatisfactory, mainly due to low specific surface area and severe photogenerated electron–hole pair recombination in PCN . To enhance the photocatalytic activity of pristine PCN, researchers have explored various strategies such as constructing compound semiconductors, − surface sensitization, molecular-structure modifications, − and nanostructured designs. , Although the aforementioned methods can enhance the activity of PCN, their effectiveness is limited by drawbacks. For instance, while compound semiconductors can efficiently separate photogenerated electrons and holes, finding materials with matching band gaps is challenging.…”

Section: Introductionmentioning

confidence: 99%

In Situ Analysis Photogenerated Electron Transport Behavior of C Self-Doped Carbon Nitride for Photocatalytic H₂ Production

Li,

Chen,

Pei

et al. 2024

ACS Catal.

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The process of C self-doping modifies the molecular structure and electron distribution of carbon nitride, hindering the integration foreign elements. In this study, C selfdoped carbon nitride-ethylenediamine (HCN-EDA) was produced via a hydrothermal technique involving dicyanodiamine and ethylenediamine (EDA). This variant of self-doped carbon nitride exhibits a broadened visible-light absorption range, thereby improving the absorption and utilization of sunlight. HCN-EDA is characterized by significantly lower photoluminescence intensity, increased carrier lifetime, and a detectable electron paramagnetic resonance signal compared to pristine carbon nitride. Furthermore, theoretical calculations and synchronous illumination X-ray photoelectron spectroscopy confirmed that C self-doped carbon nitride with the rearranged electron distribution, leading to enhanced light responsiveness and more active electron transfer behavior. The hydrogen-evolution rate of HCN-EDA reached 52.16 mmol/(g × h), which is 63 times greater than that of pristine carbon nitride under white light from a light-emitting diode. Additionally, HCN-EDA demonstrated impressive visible light reactivity, with apparent quantum yields of 31.6% at 420 nm and 4.3% at 520 nm.

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Design, synthesis and application of new iron-based cockscomb-like photocatalyst for high effectively degrading water contaminant under sunlight

Cited by 18 publications

References 62 publications

Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Sn-bridge type-Ⅱ PCN/Sn/SnO heterojunction with enhanced photocatalytic activity

In Situ Analysis Photogenerated Electron Transport Behavior of C Self-Doped Carbon Nitride for Photocatalytic H₂ Production

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Design, synthesis and application of new iron-based cockscomb-like photocatalyst for high effectively degrading water contaminant under sunlight

Cited by 18 publications

References 62 publications

Recent advancements of g-C3N4-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Recent advancements of g-C3N4-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Sn-bridge type-Ⅱ PCN/Sn/SnO heterojunction with enhanced photocatalytic activity

In Situ Analysis Photogenerated Electron Transport Behavior of C Self-Doped Carbon Nitride for Photocatalytic H2 Production

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Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

Recent advancements of g-C₃N₄-based magnetic photocatalysts towards the degradation of organic pollutants: a review

In Situ Analysis Photogenerated Electron Transport Behavior of C Self-Doped Carbon Nitride for Photocatalytic H₂ Production