Modulating D-Band Center of SrTiO by Co Doping for Boosted Peroxymonosulfate (PMS) Activation Under Visible Light.

Peroxymonosulfate (PMS)-based advanced oxidation technology has emerged as an effective means for removing organic pollutants from water due to its strong oxidizing ability. However, enhancing the activation efficiency of PMS represents a key challenge at present. SrTiO, a typical perovskite metal oxide, holds potential in the field of the photocatalytic degradation of pollutants, yet its application is limited by the wide bandgap and fast carrier recombination rates.

Nitrogen-doped carbon nanotube encapsulated CoCu bimetallic alloy particles to promote efficient oxygen evolution reaction via electronic structure regulation.

The rational design of efficient and cost-effective transition metal alloy electrocatalysts represents a huge challenge for the oxygen evolution reaction (OER). Herein, the bimetallic CoCu-MOF is employed as a template to significantly enhance the catalytic activity through in situ pyrolysis into melamine-assisted nitrogen-doped carbon nanotube (NCNT) encapsulated metal alloy electrocatalyst (CoCu@NCNT/CC). The CoCu@NCNT/CC demonstrates superior OER activity in 1 M KOH.

Nitrogen-rich carbon nitride activated peroxymonosulfate for the efficient photodegradation of 2, 4-dichlorophenol: Performance and mechanism insight.

Photocatalysis technology combined with advanced oxidation processes based on peroxymonosulfate (PMS) activation reveals great potential to degrade refractory pollutants with environmental-friendly and cost-competitive manners. Graphitic carbon nitride (CN) is regarded as a promising visible-light-driven meta-free catalyst due to its inherent advantages, e.g.

Molecularly Tunable Donor-Acceptor Integrated Carbon Nitride for Sunlight-Driven HO Synthesis: Mechanism and Performance Insights.

Graphite phase carbon nitride (CN) emerges as a promising catalyst for sunlight-driven HO synthesis owing to its merits of stable physicochemical properties, distinctive electronic structure, adjustable bandgap, etc., yet poor charge behavior, especially high carrier recombination and low charge migration rate, limit its photocatalytic activity. Herein, a molecularly tunable donor-acceptor (D-A) integrated CN is fabricated via cytosine doping combined with molten salt-assisted calcination.

Magnetic Field-Assisted Photocatalysis: Mechanisms, Devices, and Applications.

The magnetic field as a "non-contact" external field can instantaneously affect the separation and migration of photogenerated carriers during the photocatalytic reaction. This facilitates the large-scale industrial application of photocatalysis technology. Consequently, the potential for using external magnetic fields to enhance photocatalysis in environmental pollution control and clean energy production has received significant attention.

Rational design of a donor-acceptor structure in covalent heptazine frameworks to boost photocatalytic nitrogen fixation.

Herein, the construction of potential donor-acceptor (D-A) structures was guided using density-functional theory (DFT) calculations. The photocatalytic nitrogen fixation performance of TAPT-CHF was then experimentally determined to be 327.58 μmol g h, which was attributed to its efficient photo-induced charge separation and migration ability.

Unveiling the Dual Active Sites of Ni/Co(OH)-Ru Heterointerface for Robust Electrocatalytic Alkaline Seawater Splitting.

Constructing bifunctional electrocatalysts through the synergistic effect of diverse metal sites is crucial for achieving high-efficiency and steady overall water splitting. Herein, a "dual-HER/OER-sites-in-one" strategy is proposed to regulate dominant active sites, wherein Ni/Co(OH)-Ru heterogeneous catalysts formed on nickel foam (NF) demonstrate remarkable catalytic activity for oxygen evolution reaction (OER) as well as hydrogen evolution reaction (HER). Meanwhile, the potentials@10 mA cm of Ni/Co(OH)-Ru@NF for overall alkaline water and seawater splitting are only 1.

Tailoring C-defect O-doping and n-Ï€* transition awakened porous ultra-thin carbon nitride for efficient peroxymonosulfate activation: Performances and mechanism insight.

Integrating photocatalysis technology with peroxymonosulfate oxidation possesses huge potential for degrading stubborn pollutant. Herein, a porous ultra-thin carbon nitride with C-defect O-doping and advanced n-Ï€* transition was customized by one-pot thermal-induced polymerization of molten urea assisted with paraformaldehyde. Via visible-light coupling peroxymonosulfate activation, the DCN-100 can completely photodegrade 2,4-dichlorophenol, and rate constant is 136.

Fabrication of a Partial Encapsulation Architecture on S-Scheme Heterojunctions toward Durable Selective Photocatalytic CO Reduction.

It remains a challenging issue to achieve durably stable photocatalytic CO reduction over heterojunctions owing to their inherent structural assembly features. Herein, a unique partial encapsulation architecture is fabricated on the 3D/2D CoWO/CN heterojunction by embedding CoWO microspheres on CN nanosheets, which achieves efficient, durable, stable, and selective photocatalytic CO reduction. For the optimal 5%-CoWO/CN heterojunction, the yield of selective CO reduction to CO is 7.

Engineering the Sandwich-Type Porphyrinic MOF-Ruthenium-Nickel Foam Electrode for Boosting Overall Water Splitting via Self-Reconstruction.

The rational construction of a hierarchical noble metal-metal-organic frameworks (MOFs) structure is anticipated to yield enduring and highly efficient performance in alkaline electrocatalytic water splitting. Herein, a sandwich construction strategy is employed to enhance the stability, wherein active RutheniRu (Ru) nanosheets are incorporated onto nickel foam (NF) and subsequently covered with porphyrinic MOFs (PMOFs). In addition, activated PMOF-NiOOH-Ru/NF-C/A electrodes are obtained by electrochemical self-reconstruction as cathode and anode, respectively.

Control interfacial charge transfer behavior by creating surface defects on structure unit of heterojunction to drive carrier separation for enhancing photocatalytic CO reduction.

Controlling interfacial charge transfer behavior of heterojunction is an arduous issue to efficiently drive separation of photogenerated carriers for improving the photocatalytic activity. Herein, the interface charge transfer behavior is effectively controlled by fabricating an unparalleled V-NiWO/PCN heterojunction that is prepared by encapsulating NiWO nanoparticles rich in surface oxygen vacancies (V-NiWO) in the mesoporous polymeric carbon nitride (PCN) nanosheets. Experimental and theoretical investigations show that, differing with the traditional p-n junction, the direction of built-in electric field between p-type NiWO and n-type PCN is reversed interestingly.

A cobalt-modified covalent organic framework enables highly efficient degradation of 2,4-dichlorophenol in high concentrations through peroxymonosulfate activation.

The development of covalent organic frameworks (COFs) which can rapidly degrade high concentrations of 2,4-dichlorophenol is of great significance for its practical application. In this work, we report a cobalt-doped two-dimensional (2D) COF (JLNU-307-Co) for the ultra-efficient degradation of high concentration 2,4-dichlorophenol (2,4-DCP) by activating peroxymonosulfate (PMS). The JLNU-307-Co/PMS system takes only 3 min to degrade 100% of 50 mg L 2,4-DCP and shows excellent catalytic stability in real water.

Enhanced Photocatalytic Properties of All-Organic IDT-COOH/O-CN S-Scheme Heterojunctions Through π-π Interaction and Internal Electric Field.

Herein, we present a distinct methodology for the in situ electrostatic assembly method for synthesizing a conjugated (IDT-COOH)/oxygen-doped g-CN (O-CN) S-scheme heterojunction. The electron delocalization effect due to π-π interactions between O-CN and self-assembled IDT-COOH favors interfacial charge separation. The self-assembled IDT-COOH/O-CN exhibits a broadened visible absorption to generate more charge carriers.

Ultralow ruthenium modification of cobalt metal-organic frameworks for enhanced efficient bifunctional water splitting.

Hydrogen economy has emerged as a promising alternative to the current hydrocarbon economy. It involves harvesting renewable energy to split water into hydrogen and oxygen and then further utilising clean hydrogen fuel for various applications. The rational exploration of advanced non-precious metal bifunctional electrocatalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is critical for efficient water splitting.

Regio- and Stereoselective Switchable Synthesis of ()- and ()--Carbonylvinylated Pyrazoles.

Regio- and stereoselective switchable synthesis of ()- and ()--carbonylvinylated pyrazoles is first developed by using the Michael addition reaction of pyrazoles and conjugated carbonyl alkynes. AgCO plays a key role in the switchable synthesis of ()- and ()--carbonylvinylated pyrazoles. AgCO-free reactions lead to thermodynamically stable ()--carbonylvinylated pyrazoles in excellent yields whereas reactions with AgCO give ()--carbonylvinylated pyrazoles in good yields.

Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire.

A 1:10 scale model tunnel with a length, height and width of 9 m, 0.6 m and 0.8 m, respectively, was set up in this paper.

Ferric ion substitution renders cadmium metal-organic framework derivatives for modulated Li storage based on local oxidation active centers.

In this work, a novel anionic Cd-MOF ([(CH)NH][Cd(HL)DMF]·2HO·nDMF, HL = 1,2,4,5-tetrakis[(4-carboxy)phenoxymethyl]benzene) was synthesized for the first time. As a precursor, it was utilized to obtain Fe@Cd-MOF crystals the substitution of Fe ions due to a negatively charged framework and free-coordinated carboxyl group. FeO/Fe-embedded carbon-based materials (Fe@Cd-MOFD) were further constructed by deriving Fe@Cd-MOF at high temperatures.

Advancing n-Ï€* electron transition of carbon nitride via distorted structure and nitrogen heterocycle for efficient photodegradation: Performance, mechanism and toxicity insight.

To adequately utilize solar energy for water pollution remediation, tailoring graphite carbon nitride (CN) with sufficient active sites exposure, visible-light harvest and eminent charge separation/migration/recombination efficiency, has long been pursuing. Herein, a pyrazine doped distorted architecture CN with advancing n-Ï€* electron transition was tailored via one-pot thermal-melting assemble following thermal-induce copolymerization of pyrazine-2,3-dicarboxylic acid and urea. Various characterizations verify the successful construction of distorted porous thin wall CN.

Simulation of Large-Scale Tunnel Belt Fire and Smoke Characteristics under a Water Curtain System Based on CFD.

Transport belt fires pose a serious threat to the lives of miners. The smoke spread characteristics of transport belt fires are important for the effective construction of underground safety works. In this paper, a water curtain system is added to ventilation to investigate the effectiveness of water spray in blocking fire-induced smoke and heat.

Synergies of Adjacent Sites in Atomically Dispersed Ruthenium toward Achieving Stable Hydrogen Evolution.

It is a challenge to fabricate atomically dispersed metal clusters in polymeric carbon nitride (PCN) for durable photocatalytic reactions owing to the thermodynamic stability limitation. Herein, atomically dispersed Ru clusters are implanted into the PCN skeleton matrix based on an ionic diffusion and coordination (IDC) strategy, the stability of which is improved owing to the robust Ru-N bonds in the formed RuN and RuN configurations. Additionally, RuN and RuN as charge transport bridges between two adjacent melon strands efficaciously conquer hydrogen bond restriction in the skeleton to facilitate the in-plane mobility and separation of charge carriers.

A high-performance SERS imprinted membrane based on Ag/CNTs for selective detection of spiramycin.

In this test, the eggshell membrane (ESM) is selected as the support membrane for the biocompatibility and anchors CNTs on the surface to increase the mechanical properties. Then Ag NPs are decorated on CNTs-ESM substrate as SERS substrate by twice in-situ reduction. Finally, a layer of imprinted polymers is coated on the surface of the substrate to synthesize the imprinted membrane for selective detection of spiramycin.

synthesis of morphology-controlled MoO/FeS bifunctional catalysts for high-efficiency and stable alkaline water splitting.

The advancement of a bifunctional electrocatalyst consisting of Earth's rich elements and exhibiting high efficiency is the key to obtain hydrogen fuel by overall water splitting (OWS). Here, a facile and extensible hydrothermal synthesis of an electrocatalyst on iron foam (MoO/FeS/IF) as a robust bifunctional catalyst with excellent catalytic activity is designed for the hydrogen evolution reaction (HER) with an overpotential of 142 mV at 100 mA cm, and for the OER with lower overpotentials of 300 and 500 mV at 100 and 1000 mA cm. The good activity is ascribed to the controllable morphology, stronger bonding of the catalyst to a substrate and optimized electronic configuration.

In situ growth of hierarchical bimetal-organic frameworks on nickel-iron foam as robust electrodes for the electrocatalytic oxygen evolution reaction.

Evidence shows that self-supported electrocatalysts are crucial role to solving environmental and energy issues. In this study, self-supported 2D metal-organic framework (MOF) nanosheets grown in situ on nickel-iron foam (NFF) were prepared by a one-step solvothermal process. The hierarchical nanostructure possesses a high specific surface area and abundant metal sites, which are beneficial for electrocatalytic reactions.

NIR-Absorbing Electron Acceptor Based on a Selenium-Heterocyclic Core Attaching to Phenylalkyl Side Chains for Polymer Solar Cells with 17.3% Efficiency.

Selenium-heterocyclic and side-chain strategies for developing near-infrared (NIR) small fused-ring acceptors (FRAs) to further obtain short-circuit current density () have proven advantageous in the top-performing polymer solar cells (PSCs). Herein, a new electron-rich central selenium-containing heterocycle core (BTSe) attaching alkyl side chains with a terminal phenyl group was coupled with a difluorinated and dichlorinated electron-accepting terminal 1,1-dicyanomethylene-3-indanone (IC) to afford two types of new FRAs, BTSe-IC2F and BTSe-IC2Cl. Interestingly, in spite of the weaker intramolecular charge transfer, BTSe-IC2F shows a stronger NIR response because of the smaller bandgap () up to 1.

Visible-light-induced bactericidal properties of a novel thiophene-based linear conjugated polymer/TiO heterojunction.

The low utilization of visible light and the fast recombination of photogenerated electron-hole pairs are the two intrinsic defects that have hindered the antibacterial applications of TiO. The addition of organic photocatalytic agents to form heterojunctions with TiO powder can effectively address these problems. A novel linear conjugated polymer poly[(thiophene-ethylene-thiophene)-thiophene-3-carboxylic acid decyl ester] (PTCD) was successfully synthesized Stille coupling polymerization.