Tailoring Advanced N‐Defective and S‐Doped g‐C3N4 for Photocatalytic H2 Evolution DOI
Haitao Wang, Jizhou Jiang,

Lianglang Yu

et al.

Small, Journal Year: 2023, Volume and Issue: 19(28)

Published: May 16, 2023

Although challenges remain, synergistic adjusting various microstructures and photo/electrochemical parameters of graphitic carbon nitride (g-C3 N4 ) in photocatalytic hydrogen evolution reaction (HER) are the keys to alleviating energy crisis environmental pollution. In this work, a novel nitrogen-defective sulfur-doped g-C3 (S-g-C3 -D) is designed elaborately. Subsequent physical chemical characterization proved that developed S-g-C3 -D not only displays well-defined 2D lamellar morphology with large porosity high specific surface area but also has an efficient light utilization carriers-separation transfer. Moreover, calculated optimal Gibbs free adsorbed (ΔGH* for at S active sites close zero (≈0.24 eV) on basis first-principle density functional theory (DFT). Accordingly, catalyst shows H2 rate 5651.5 µmol g-1 h-1 . Both DFT calculations experimental results reveal memorable defective /S-doped step-scheme heterojunction constructed between S-doped domains N-defective structural configuration -D. This work exhibits significant guidance design fabrication high-efficiency photocatalysts.

Language: Английский

In situ construction of S-scheme AgBr/BiOBr heterojunction with surface oxygen vacancy for boosting photocatalytic CO2 reduction with H2O DOI

Zerui Miao,

Qingli Wang, Yanfeng Zhang

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 301, P. 120802 - 120802

Published: Oct. 11, 2021

Language: Английский

Citations

454
Piezo‐Photocatalysis over Metal–Organic Frameworks: Promoting Photocatalytic Activity by Piezoelectric Effect DOI
Chenxi Zhang,

Da Lei,

Chenfan Xie

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(51)

Published: Oct. 13, 2021

The built-in electric field can be generated in the piezoelectric materials under mechanical stress. resulting effect is beneficial to charge separation photocatalysis. Meanwhile, stress usually gives rise accelerated mass transfer and enhanced catalytic activity. Unfortunately, it remains a challenge differentiate contribution of these two factors performance. Herein, for first time, isostructural metal-organic frameworks (MOFs), i.e., UiO-66-NH2 (Zr) (Hf), are adopted piezo-photocatalysis. Both MOFs, featuring same structures except diverse Zr/Hf-oxo clusters, possess distinctly different properties. Strikingly, (Hf) exhibits ≈2.2 times activity compared with that simultaneous light ultrasonic irradiation, though both MOFs display similar photocatalytic H2 production without irradiation. Given their pore features behaviors, difference unambiguously assignable effect. As result, contributions piezo-photocatalysis clearly distinguished owing stronger property (Hf).

Language: Английский

Citations

265
2D materials and heterostructures for photocatalytic water-splitting: a theoretical perspective DOI
Guangzhao Wang, Junli Chang, Wenyi Tang

et al.

Journal of Physics D Applied Physics, Journal Year: 2022, Volume and Issue: 55(29), P. 293002 - 293002

Published: Feb. 22, 2022

Abstract Photocatalytic water-splitting for hydrogen generation by sunlight provides a new route to address energy and environmental problems. In recent years, tremendous efforts have been devoted designing highly efficient photocatalysts (PCs). Adequate light absorption, effective photogenerated carrier separation, sufficiently large overpotentials water redox are crucial in achieving high solar-to-hydrogen (STH) efficiency. These parameters thus strongly influence the design of novel photocatalytic materials. Two-dimensional (2D) PCs flourished because their specific surface area ratio, short migration distance compared bulk PCs, enormous flexibility via van der Waals heterostructure (HS) engineering many other unique capabilities that meet criteria high-efficiency STH conversion. this review, we summarize developments 2D materials HSs applications from theoretical perspective. Specifically, first discuss number employed water-splitting. We review various strategies material modulate enhance performance improving harvesting such as introduction defects dopants, application strain, external electric field, rotation angles ferroelectric switching. then methods evaluate evolution reaction, oxygen reaction Finally, opportunities challenges presented.

Language: Английский

Citations

180
S-scheme heterojunction of crystalline carbon nitride nanosheets and ultrafine WO3 nanoparticles for photocatalytic CO2 reduction DOI

Gongjie Chen,

Ziruo Zhou,

Bifang Li

et al.

Journal of Environmental Sciences, Journal Year: 2023, Volume and Issue: 140, P. 103 - 112

Published: May 30, 2023

Language: Английский

Citations

142
Tailor‐Engineered 2D Cocatalysts: Harnessing Electron–Hole Redox Center of 2D g‐C3N4 Photocatalysts toward Solar‐to‐Chemical Conversion and Environmental Purification DOI
Grayson Zhi Sheng Ling, Sue‐Faye Ng, Wee‐Jun Ong

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(29)

Published: Feb. 23, 2022

Abstract Sparked by natural photosynthesis, solar photocatalysis using metal‐free graphitic carbon nitride (g‐C 3 N 4 ) with appealing electronic structure has turned up as the most captivating technique to quest for sustainable energy generation and pollution‐free environment. Nonetheless, low‐dimensional g‐C is thwarted from sluggish kinetics rapid recombination of photogenerated carriers upon light irradiation. Among multifarious modification strategies, engineering 2D cocatalysts anticipated accelerate redox kinetics, augment active sites ameliorate electron–hole separation boosted activity thanks its face‐to‐face contact surface. It timely technological significance review 2D/2D interfaces state‐of‐the‐art cocatalysts, spanning carbon‐containing phosphorus‐containing, metal dichalcogenide, other cocatalysts. Fundamental principles each photocatalytic application will be introduced. Thereafter, recent advances cocatalyst‐mediated systems critically evaluated based on their interfacial engineering, emerging roles, impacts toward stability catalytic efficiency. Importantly, mechanistic insights into charge dynamics structure–performance relationship deciphered. Last, noteworthy research directions are prospected deliver insightful ideas future development . Overall, this serve a scaffold cornerstone in designing dimensionality‐dependent cocatalyst‐assisted renewable ecologically green

Language: Английский

Citations

140
Piezocatalytic Techniques in Environmental Remediation DOI
Jiahao Liu, Weiliang Qi,

Mengmeng Xu

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(5)

Published: Nov. 1, 2022

Abstract As a consequence of rapid industrialization throughout the world, various environmental pollutants have begun to accumulate in water, air, and soil. This endangers ecological environment earth, remediation has become an immediate priority. Among techniques, piezocatalytic which uniquely take advantage piezoelectric effect, attracted much attention. Piezoelectric effects allow pollutant degradation directly, while also enhancing photocatalysis by reducing recombination photogenerated carriers. In this Review, we provide comprehensive summary recent developments techniques for remediation. The origin effect as well classification materials their application are systematically summarized. We analyze potential underlying mechanisms. Finally, urgent problems future development discussed.

Language: Английский

Citations

140
Double-defect-induced polarization enhanced OV-BiOBr/Cu2−xS high-low junction for boosted photoelectrochemical hydrogen evolution DOI
Xibao Li, Qiang Liu, Fang Deng

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 314, P. 121502 - 121502

Published: May 13, 2022

Language: Английский

Citations

126
Recent Progress in the Synthesis and Applications of Composite Photocatalysts: A Critical Review DOI
Muhammad Humayun, Chundong Wang, Wei Luo

et al.

Small Methods, Journal Year: 2021, Volume and Issue: 6(2)

Published: Dec. 16, 2021

Photocatalysis is an advanced technique that transforms solar energy into sustainable fuels and oxidizes pollutants via the aid of semiconductor photocatalysts. The main scientific technological challenges for effective photocatalysis are stability, robustness, efficiency For practical applications, researchers trying to develop highly efficient stable Since literature scattered, it urgent write a critical review summarizes state-of-the-art progress in design variety composite photocatalysts environmental applications. Herein, comprehensive presented overview, history, mechanism, advantages, photocatalysis. Further, recent advancements heterostructure including alloy quantum dots based composites, carbon composites nanotubes, dots, graphitic nitride, graphene, covalent-organic frameworks metal carbides, halide perovskites, nitrides, oxides, phosphides, sulfides, metal-organic plasmonic materials single atom CO2 conversion, H2 evolution, oxidation discussed elaborately. Finally, perspectives further improvement provided.

Language: Английский

Citations

120
Photocatalytic nitrogen reduction to ammonia: Insights into the role of defect engineering in photocatalysts DOI Creative Commons
Huidong Shen, Mengmeng Yang, Leiduan Hao

et al.

Nano Research, Journal Year: 2021, Volume and Issue: 15(4), P. 2773 - 2809

Published: Sept. 4, 2021

Abstract Engineering of defects in semiconductors provides an effective protocol for improving photocatalytic N 2 conversion efficiency. This review focuses on the state-of-the-art progress defect engineering photocatalysts reduction toward ammonia. The basic principles and mechanisms thermal catalyzed photon-induced are first concisely recapped, including relevant properties molecule, reaction pathways, NH 3 quantification methods. Subsequently, classification, synthesis strategies, identification techniques compendiously summarized. Advances situ characterization monitoring state during process also described. Especially, various surface strategies their critical roles photoreduction performance highlighted, vacancies (i.e., anionic cationic vacancies), heteroatom doping metal element nonmetal doping), atomically defined sites. Finally, future opportunities challenges as well perspectives further development defect-engineered nitrogen to ammonia presented. It is expected that this can provide a profound guidance more specialized design catalysts with high activity stability photochemical fixation.

Language: Английский

Citations

117
Roles of Graphene Oxide in Heterogeneous Photocatalysis DOI Creative Commons
Kang‐Qiang Lu,

Yue‐Hua Li,

Zi‐Rong Tang

et al.

ACS Materials Au, Journal Year: 2021, Volume and Issue: 1(1), P. 37 - 54

Published: Aug. 9, 2021

Graphene oxide (GO) has been widely utilized as the precursor of graphene (GR) to fabricate GR-based hybrid photocatalysts for solar-to-chemical energy conversion. However, until now, properties and roles that GO played in heterogeneous photocatalysis have remained relatively elusive. In this Review, we start with a brief discussion synthesis structure GO. Then, photocatalysis-related GO, including electrical conductivity, surface chemistry, dispersibility, semiconductor properties, are concisely summarized. particular, highlighted fundamental multifaceted photocatalysis, which contain GR, cross-linked framework constructing aerogel photocatalyst, macromolecular surfactant, two-dimensional growth template, photocatalyst by itself. Furthermore, future prospects remaining challenges on developing effective GO-derived presented, is expected inspire further research into promising domain.

Language: Английский

Citations

115