Selective Enhancement of Photo‐Piezocatalytic Performance in BaTiO₃ Via heterovalent Ion Doping

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(52)

Published: Oct. 17, 2022

Abstract This study proposes a strategy based on heterovalent ion doping that gives rise to synergistic piezo‐phototronic effect with significantly improved catalytic activity and leads selective enhancement for specific pollutants. Owing the enhanced light absorption, hydrogen evolution rates are as high 3704 3178 µmolg −1 h in 0.01Li‐doped BaTiO 3 0.02La‐doped nanosheets, respectively, under simultaneous irradiation by ultrasound light, factor of 4.6 3.9 times higher than pure . The performance also far exceeds single piezocatalysis, photocatalysis, or sum two Li/La‐doped nanosheets due effects piezoelectric field promoting photo‐induced separation electron‐hole pairs. Further, carefully selecting donor acceptor doping, significant catalyst pollutants is obtained controlling band structure. Compared , possesses anionic dyes such Methyl blue Malachite Green, reaching 0.067 1.379 min while exhibits better cationic Rhodamine B Orange, degradation up 0.274 0.029 respectively. offers path design efficient piezocatalysts applications.

Language: Английский

---

Photothermal effect and continuous hot electrons injection synergistically induced enhanced molecular oxygen activation for efficient selective oxidation of benzyl alcohol over plasmonic W18O49/ZnIn2S4 photocatalyst

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 299, P. 120675 - 120675

Published: Sept. 2, 2021

Language: Английский

---

Reticular framework materials for photocatalytic organic reactions

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(22), P. 7949 - 8004

Published: Jan. 1, 2023

Photocatalytic organic reactions, harvesting solar energy to produce high value-added chemicals, have attracted increasing attention as a sustainable approach address the global crisis and environmental issues. Reticular framework materials, including metal-organic frameworks (MOFs) covalent (COFs), are widely considered promising candidates for photocatalysis owing their crystallinity, tailorable pore environment extensive structural diversity. Although design synthesis of MOFs COFs been intensively developed in last 20 years, applications photocatalytic transformations still preliminary stage, making systematic summary necessary. Thus, this review aims provide comprehensive understanding useful guidelines exploration suitable MOF COF photocatalysts towards appropriate reactions. The commonly used reactions categorized facilitate identification reaction types. From practical viewpoint, fundamentals experimental design, active species, performance evaluation external conditions, discussed detail easy experimentation. Furthermore, latest advances COFs, composites, comprehensively summarized according actual sites, together with discussion structure-property relationship. We believe that study will be helpful researchers novel reticular various synthetic applications.

Language: Английский

---

Antibacterial Carbon Dots: Mechanisms, Design, and Applications

Advanced Healthcare Materials, Journal Year: 2023, Volume and Issue: 12(23)

Published: May 13, 2023

Abstract The increase in antibiotic resistance promotes the situation of developing new antibiotics at forefront, while development non‐antibiotic pharmaceuticals is equally significant. In post‐antibiotic era, nanomaterials with high antibacterial efficiency and no drug make them attractive candidates for materials. Carbon dots (CDs), as a kind carbon‐based zero‐dimensional nanomaterial, are attracting much attention their multifunctional properties. abundant surface states, tunable photoexcited excellent photo‐electron transfer properties sterilization CDs feasible gradually emerging field. This review provides comprehensive insights into recent topics include mechanisms, design, optimization processes, potential practical applications also highlighted, such treatment bacterial infections, against biofilms, surfaces, food preservation, bacteria imaging detection. Meanwhile, challenges outlook field discussed proposed.

Language: Английский

---

Recent advances in solar‐driven CO₂ reduction over g‐C₃N₄‐based photocatalysts

Carbon Energy, Journal Year: 2022, Volume and Issue: 5(2)

Published: May 18, 2022

Abstract The persistent increase of CO 2 levels in the atmosphere, already exceeding 400 ppm, urges exploration emission reduction and recycling technologies. Ideally, photocatalytic conversion into valuable hydrocarbons realizes solar‐to‐chemical energy conversion, which is a desirable “kill two birds with one stone” strategy; namely, photoreduction can simultaneously tackle shortage keep global carbon balance. Graphitic nitride (g‐C 3 N 4 ) working on reaction deserves highlight not only for metal‐free feature that endows it low cost, tunable electronic structure, easy fabrication properties but also because its strong ability. present review concisely summarizes latest advances g‐C ‐based photocatalysts toward reduction. It starts discussion thermodynamics dynamics aspects process. Then modification strategies to promote have been discussed detail, including surface functionalization, molecule structure engineering, crystallization, morphology loading cocatalyst, constructing heterojunction. Meanwhile, intrinsic factors affecting activity selectivity are analyzed summarized. In end, challenges prospects future development highly presented.

Language: Английский

---

State of the art in flexible SERS sensors toward label-free and onsite detection: from design to applications

Nano Research, Journal Year: 2022, Volume and Issue: 15(5), P. 4374 - 4394

Published: Jan. 6, 2022

Language: Английский

---

Control of selectivity in organic synthesis via heterogeneous photocatalysis under visible light

Deleted Journal, Journal Year: 2022, Volume and Issue: 1, P. e9120006 - e9120006

Published: May 12, 2022

Organic synthesis driven by heterogeneous catalysis is a central research theme to both fundamental and industrial production of fine chemicals. However, the employment stoichiometric strong oxidizing or reducing reagents (e.g., K₂Cr₂O₇ LiAlH₄) harsh reaction conditions high temperature pressure) always leads products overreaction other by-product residues salt acid waste). Thus poor control product selectivity tremendous energy consumption result in urgent demand develop novel technologies for catalysis. Given current global development CO₂ reduction sustainable utilization, one promising protocol photocatalysis. It enables solar-to-chemical conversion under mild room temperature, ambient pressure, air as oxidant) offers unique pathways improved control. To accurately tailor desired products, electronic structure positions valence-band maximum conduction-band minimum), geometric nanorod, nanosheet, porous morphology), surface chemical micro-environment vacancy sites co-catalysts) photocatalysts require rational design construction. In this review, we will briefly analyze some effective photocatalytic systems with excellent regulation ability organic transformations (mainly oxidation types) visible light irradiation, put forward opinions on optimal fabrication nanostructured realize selective synthesis.

Language: Английский

---

Covalent organic frameworks and their composites as multifunctional photocatalysts for efficient visible-light induced organic transformations

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 472, P. 214774 - 214774

Published: Aug. 23, 2022

Language: Английский

---

Nearly 100% selective and visible-light-driven methane conversion to formaldehyde via. single-atom Cu and Wδ+

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 10, 2023

Direct solar-driven methane (CH4) reforming is highly desirable but challenging, particularly to achieve a value-added product with high selectivity. Here, we identify synergistic ensemble effect of atomically dispersed copper (Cu) species and partially reduced tungsten (Wδ+), stabilised over an oxygen-vacancy-rich WO3, which enables exceptional photocatalytic CH4 conversion formaldehyde (HCHO) under visible light, leading nearly 100% selectivity, very yield 4979.0 μmol·g-1 within 2 h, the normalised mass activity 8.5 × 106 μmol·g-1Cu·h-1 HCHO at ambient temperature. In-situ EPR XPS analyses indicate that Cu serve as electron acceptor, promoting photo-induced transfer from conduction band O2, generating reactive •OOH radicals. In parallel, adjacent Wδ+ act hole acceptor preferred adsorption activation site H2O produce hydroxyl radicals (•OH), thus activate methyl (•CH3). The synergy dual active sites boosts overall efficiency selectivity process.

Language: Английский

---

Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(24), P. 10415 - 10444

Published: June 7, 2024

Persulfate (PS)-based advanced oxidation processes (AOPs) for pollutant removal have attracted extensive interest, but some controversies about the identification of reactive species were usually observed. This critical review aims to comprehensively introduce basic concepts and rectify cognitive biases appeals pay more attention experimental details in PS-AOPs, so as accurately explore reaction mechanisms. The scientifically summarizes character, generation, different species. It then highlights complexities analysis electron paramagnetic resonance, uncertainties use probes scavengers, necessities determination scavenger concentration. importance choice buffer solution, operating mode, terminator, filter membrane is also emphasized. Finally, we discuss current challenges future perspectives alleviate misinterpretations toward mechanisms PS-AOPs.

Language: Английский

---