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In the present work the authors show that anodic TiO2 nanotubes (NT) show excellent harvesting properties for Pt single atoms (Pt SAs) from highly dilute Pt solutions. The tube walls of anodic nanotubes, after adequate annealing to anatase, provide ample of suitable trapping sites—that is, surface Ti3+‐Ov (Ov: oxygen vacancy) defects that are highly effective to extract and accumulate Pt in the form...
Crystal facet engineering has been recognized as a powerful strategy to finely modulate the charge separation behavior in semiconductor photocatalysis; however, disclosing the intrinsic roles that the morphologies and crystal facets play on photogenerated charge separation of semiconductor nanocrystals remains elusive. Herein, exemplified on the typical visible‐light‐responsive photocatalyst bismuth...
Conversion of solar and mechanical vibration energies for catalytic water splitting into H2 has gained substantial attention recently. However, the sluggish charge separation and inefficient energy utilization in photocatalytic and piezocatalytic processes severely restrict the catalytic activity. In this paper, efficient piezo‐photocatalytic H2 evolution from water splitting is realized via simultaneously...
Construction of photocatalytic systems with spatially separated dual cocatalysts is considered as a promising route to modulate charge separation/transfer, promote surface redox reactivities, and prevent unwanted reverse reactions. However, past efforts on the loading of spatially separated double‐cocatalysts are limited to hollow structured semiconductors with inner/outer surface and monocrystalline...
Pollution‐induced degradation of the environment is a serious problem for both developing and developed countries. Existing remediation methods are restricted, necessitating the development of novel remediation technologies. Nanomaterials with unique characteristics have recently been developed for remediation. Quantum dots (QDs) are semiconductor nanoparticles (1–10 nm) with optical and electrical...
Previous studies on syntheses of metal‐organic frameworks (MOFs) for photocatalytic CO2 reduction are mainly focused on the exquisite control over the net topology and the functionality of metal clusters/organic building blocks. This contribution demonstrates that the rational design of MOF‐based photocatalyst can be further extended to the hierarchical structure at micrometer scales well beyond the...
Covalent triazine frameworks (CTFs) represent promising polymeric photocatalysts for photocatalytic hydrogen production with visible light. However, the separation and transfer of charges in CTFs are isotropic because of the uniform distribution of donor–acceptor motifs in the skeleton. Herein, to achieve the anisotropic charge carrier separation and migration, thiophene (Th) or benzothiadiazole (BT)...
Atomically dispersed metal catalysts often exhibit high catalytic performances, but the metal loading density must be kept low to avoid the formation of metal nanoparticles, making it difficult to improve the overall activity. Diverse strategies based on creating more anchoring sites (ASs) have been adopted to elevate the loading density. One problem of such traditional methods is that the single...
Single‐Atom Catalysts
The low loading of single‐atom catalysts makes it difficult to improve their overall activity. In article number 2200073, Ang Li, Erjun Kan, Li Song, Jinlong Gong, and co‐workers report a chemical scissors strategy to saturate the anchoring sites for single atoms, which elevates the loading of Pd single atoms even on bare substrate with only a few anchoring sites.
Hydrogen peroxide (H2O2) as a useful chemical has a wide range of applications, and the development of efficient semiconducting materials for H2O2 production is deemed as a promising strategy to realize the energy conversion. In this paper, CdxZn1‐xS (x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, 1) nano‐branches are fabricated and the piezocatalytic and photocatalytic H2O2 evolution performance are studied. Under...
Just as the heterojunctions in physics, donor–acceptor (D‐A) heterostructures are an emerging class of photoactive materials fabricated from two semiconductive components at the molecular level. Among them, D‐A hybrid heterostructures from organic and inorganic semiconductive components have attracted extensive attention in the past decades due to their combined advantages of high stability for the...
Light‐assisted antibacterial therapy is a promising alternative to antibiotic therapy due to the high antibacterial efficacy without bacterial resistance. Recent research has mainly focused on the use of near‐infrared light irradiation to kill bacteria by taking advantage of the synergistic effects rendered by hyperthermia and radical oxygen species. However, photocatalytic antibacterial therapy excited...
Photoelectrochemical Water Splitting
In article number 2201106, Athanasios Chatzitakis and co‐workers combine in situ metal exsolution and the galvanic replacement reaction for the synthesis of advanced catalysts for diverse energy conversion applications. Exsolved Ni nanoparticles are galvanically restructured and a wealth of bimetallic nanostructures are facilely synthesized. Among them are well...
Photocatalytic CO2 Reduction
SACs (single‐atom catalysts) have recently gained a lot of attention for their potential in various catalytic applications. In article number 2201428, Su‐Il In and co‐workers review the recent development of SACs for photocatalytic CO2 reduction, particularly focusing on performance challenges and strategies to achieve high catalytic activity, product selectivity, and...
In recent years, single‐atom catalysts (SACs) have attracted the interest of researchers owing to their suitability for various catalytic applications. For instance, their optoelectronic features, site‐specific activity, and cost‐effectiveness make SACs ideal for photocatalytic CO2 reduction. The activity, product selectivity, and photostability of SACs depend on various factors such as the nature...
There is a growing need to control and tune nanoparticles (NPs) to increase their stability and effectiveness, especially for photo‐ and electrochemical energy conversion applications. Exsolved particles are well anchored and can be re‐shaped without changing their initial location and structural arrangement. However, this usually involves lengthy treatments and use of toxic gases. Here, the galvanic...
Hollow Core‐Shell Structures
Core‐shell Cu2‐xS@ZnIn2S4 hollow nanoboxes S‐scheme heterojunction photocatalysts are prepared via surface growth deposition and hydrothermal method. The Cu2‐xS@ZnIn2S4 photocatalyst exhibits excellent photothermal‐photocatalytic performance. This can be attributed to core‐shell S‐scheme heterojunction promoting efficient interfacial contact and facilitating the spatial...
Major issues in photocatalysis include improving charge carrier separation efficiency at the interface of semiconductor photocatalysts and rationally developing efficient hierarchical heterostructures. Surface continuous growth deposition is used to make hollow Cu2‐xS nanoboxes, and then simple hydrothermal reaction is used to make core‐shell Cu2‐xS@ZnIn2S4 S‐scheme heterojunctions. The photothermal...
Urinary‐based infections affect millions of people worldwide. Such bacterial infections are mainly caused by Escherichia coli (E. coli) biofilm formation in the bladder and/or urinary catheters. Herein, the authors present a hybrid enzyme/photocatalytic microrobot, based on urease‐immobilized TiO2/CdS nanotube bundles, that can swim in urea as a biocompatible fuel and respond to visible light. Upon...
The conversion of CO2 into high‐value added chemicals driven by solar energy is an effective way to solve environmental problems, which is, however, largely restricted by the competition reaction of the hydrogen evolution reaction (HER) and easy electron–hole recombination, etc. Herein, VO4‐supported ultrathin NiMgV‐layered double hydroxide (V/NiMgV‐LDH) nanosheets are successfully fabricated, and...
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