Emerging S‐Scheme Photocatalyst

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(11)

Published: Dec. 28, 2021

Photocatalysis is a green technology to use ubiquitous and intermittent sunlight. The emerging S-scheme heterojunction has demonstrated its superiority in photocatalysis. This article covers the state-of-the-art progress provides new insights into general designing criteria. It starts with challenges confronted by single photocatalyst from perspective of energy dissipation borrowing common behaviors dye molecule. Subsequently, other problems faced are summarized. Then viable solution for these construction heterojunctions. To overcome mistakes type-II Z-scheme heterojunctions, proposed underlying reaction mechanism Afterward, design principles four types heterojunctions suggested. Following this, direct characterization techniques testifying charge transfer presented. Finally, different photocatalytic applications Specifically, this work endeavors clarify critical understanding on curved Fermi level interface, which can help strengthen advance fundamental theories Moreover, current prospects critically discussed.

Language: Английский

---

In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

Small, Journal Year: 2021, Volume and Issue: 17(41)

Published: Sept. 12, 2021

Reasonable design of efficient hierarchical photocatalysts has gained significant attention. Herein, a step-scheme (S-scheme) core-shell TiO2 @ZnIn2 S4 heterojunction is designed for photocatalytic CO2 reduction. The optimized sample exhibits much higher photoreduction conversion rates (the sum yield CO, CH3 OH, and CH4 ) than the blank control, i.e., ZnIn2 . improved performance can be attributed to inhibited recombination photogenerated charge carriers induced by S-scheme heterojunction. improvement also large specific surface areas abundant active sites. Meanwhile, transfer mechanism testified in situ irradiated X-ray photoelectron spectroscopy, work function calculation, electron paramagnetic resonance measurements. This provides an effective strategy designing highly solar fuels.

Language: Английский

---

Challenges for photocatalytic overall water splitting

Chem, Journal Year: 2022, Volume and Issue: 8(6), P. 1567 - 1574

Published: May 6, 2022

Language: Английский

---

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

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

Published: Oct. 11, 2021

Language: Английский

---

Construction of 2D S‐Scheme Heterojunction Photocatalyst

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Nov. 22, 2023

Abstract Semiconductor photocatalytic technology holds immense promise for converting sustainable solar energy into chemically storable energy, with significant applications in the realms of and environment. However, inherent issue rapid recombination photogenerated electrons holes hinders performance single photocatalysts. To overcome this challenge, construction 2D S‐scheme heterojunction photocatalysts emerges as an effective strategy. The deliberate design dimensionality ensures a substantial interfacial area; while, charge transfer mechanism facilitates efficient separation maximizes redox capabilities. This review commences fresh perspective on heterojunctions, followed by comprehensive exploration preparation methods characterization techniques. Subsequently, recent advancements are summarized. Notably, behind activity enhancement is elucidated. Finally, prospects development presented.

Language: Английский

---

S-scheme heterojunction photocatalysts for CO2 reduction

Matter, Journal Year: 2022, Volume and Issue: 5(12), P. 4187 - 4211

Published: Dec. 1, 2022

Language: Английский

---

S‐Scheme Co₉S₈@Cd_0.8Zn_0.2S‐DETA Hierarchical Nanocages Bearing Organic CO₂ Activators for Photocatalytic Syngas Production

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(15)

Published: March 1, 2023

Abstract Delicate modulations of CO 2 activation and charge carrier separation/migration are challenging, yet imperative to augment photoreduction efficiency. Herein, by supporting diethylenetriamine (DETA)‐functionalized Cd 0.8 Zn 0.2 S nanowires on the exterior surface hollow Co 9 8 polyhedrons, hierarchical @Cd S‐DETA nanocages fabricated as an S‐scheme photocatalyst for reducing protons produce syngas (CO H ). The amine groups strengthen adsorption , while “nanowire‐on‐nanocage” heterostructure with interface boosts separation transfer photoinduced charges. Employing Co(bpy) 3 2+ a cocatalyst, optimal effectively produces in rates 70.6 18.6 µmol h −1 (i.e., 4673 1240 g ), respectively, affording apparent quantum efficiency 9.45% at 420 nm, which is highest value under comparable conditions. Ultraviolet photoelectron spectroscopy, Kelvin probe, electron spin resonance confirm S‐schematic charge‐transfer process photocatalyst. key COOH * species responsible ‐to‐CO reduction detected in‐situ diffuse reflectance infrared Fourier transform spectroscopy endorsed density functional theory calculations, thus possible mechanism proposed.

Language: Английский

---

Piezo‐Photocatalysis over Metal–Organic Frameworks: Promoting Photocatalytic Activity by Piezoelectric Effect

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

---

2D/2D BiVO4/CsPbBr3 S-scheme heterojunction for photocatalytic CO2 reduction: Insights into structure regulation and Fermi level modulation

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 304, P. 120979 - 120979

Published: Dec. 4, 2021

Language: Английский

---

Cooperative Coupling of H₂O₂ Production and Organic Synthesis over a Floatable Polystyrene‐Sphere‐Supported TiO₂/Bi₂O₃ S‐Scheme Photocatalyst

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(38)

Published: Aug. 9, 2022

Cooperative coupling of photocatalytic H2 O2 production with organic synthesis has an expansive perspective in converting solar energy into storable chemical energy. However, traditional powder photocatalysts suffer from severe agglomeration, limited light absorption, poor gas reactant accessibility, and reusable difficulty, which greatly hinders their large-scale application. Herein, floatable composite are synthesized by immobilizing hydrophobic TiO2 Bi2 O3 on lightweight polystyrene (PS) spheres via hydrothermal photodeposition methods. The not only transparent, but also upgrade the contact between reactants photocatalysts. Thus, step-scheme (S-scheme) /Bi2 photocatalyst exhibits a drastically enhanced yield 1.15 mm h-1 decent furfuryl alcohol conversion to furoic acid synchronously. Furthermore, S-scheme mechanism dynamics systematically investigated situ irradiated X-ray photoelectron spectroscopy femtosecond transient absorption spectrum analyses. In Fourier transform infrared density functional theory calculations reveal evolution. ingenious design furnishes insight maximizing reaction kinetics provides new route for highly efficient heterogeneous catalysis.

Language: Английский

---