Highly efficient photocatalytic removal of NO and synchronous inhibition of NOvia heterojunction formed by ZnAl-LDH and MXene-TiC-derived TiO@C.

The key challenge in oxidizing NO using photocatalysis is controlling the selectivity of products to avoid the generation of toxic byproducts like NO. Here, we propose regulating the generation of reactive oxygen species by constructing Type-II heterojunctions to facilitate the deep oxidation of NO to nitrates. Experimental characterization and Density functional theory (DFT) simulations demonstrate that the outstanding photocatalytic activity of heterojunction materials stems from their superior charge separation efficiency and stronger adsorption capacity for NO and O molecules, promoting the formation of reactive oxygen species.

Fabrication of core-shell nanostructure via novel ligand-defect reassembly strategy for efficient photocatalytic hydrogen evolution and NO removal.

The core-shell structure often exhibits unique properties, resulting in superior physical and chemical performance distinct from individual component in the field of photocatalysis. However, traditional prepared methods such as template synthesis and layer-by-layer self-assembly are relatively complex. Therefore, it is necessary to explore an efficient and expedient approach.

Construction of 2D/2D S-scheme BiMoO/Zn-TCPP heterojunction via in-situ self-assembly growth strategy to enhance interface effect for efficient photocatalytic hydrogen production.

Two-dimensional/two-dimensional (2D/2D) heterojunctions are considered to be an effective strategy for forming strong interface effects and facilitating photogenerated carrier separation. However, it is usually limited by the size mismatch of the materials, even at the expense of its redox capability. Herein, 2D/2D S-scheme heterojunction photocatalyst BiMoO/Zn-TCPP (BMO/ZTP) composed of 2D BiMoO and 2D Zn-TCPP (TCPP: tetrakis (4-carboxyphenyl) porphyrin) (MOFs) was constructed by in-situ self-assembly growth strategy.

Recent Advances in the Photoreactions Triggered by Porphyrin-Based Triplet-Triplet Annihilation Upconversion Systems: Molecular Innovations and Nanoarchitectonics.

Triplet-triplet annihilation upconversion (TTA-UC) is a very promising technology that could be used to convert low-energy photons to high-energy ones and has been proven to be of great value in various areas. Porphyrins have the characteristics of high molar absorbance, can form a complex with different metal ions and a high proportion of triplet states as well as tunable structures, and thus they are important sensitizers for TTA-UC. Porphyrin-based TTA-UC plays a pivotal role in the TTA-UC systems and has been widely used in many fields such as solar cells, sensing and circularly polarized luminescence.

Recent Advances in Porphyrin-Based Systems for Electrochemical Oxygen Evolution Reaction.

Oxygen evolution reaction (OER) plays a pivotal role in the development of renewable energy methods, such as water-splitting devices and the use of Zn-air batteries. First-row transition metal complexes are promising catalyst candidates due to their excellent electrocatalytic performance, rich abundance, and cheap price. Metalloporphyrins are a class of representative high-efficiency complex catalysts owing to their structural and functional characteristics.

Switching on photocatalytic NO oxidation and proton reduction of NH-MIL-125(Ti) by convenient linker defect engineering.

Photocatalysis technology has been widely adopted to abate typical air pollutants. Nevertheless, developing photocatalysts aimed at improving photocatalytic efficiency is a challenge. Herein, the linker-defect NH-MIL-125(Ti) photocatalyst was synthesized through a convenient one-step heating-stirring method (just adjusting multiple temperatures) to firstly realize efficient photocatalytic performances of NO removal and hydrogen evolution.

Neodymium oxide (NdO) coupled tubular g-CN, an efficient dual-function catalyst for photocatalytic hydrogen production and NO removal.

Graphitic carbon nitride (g-CN) has emerged as a most promising photocatalyst, non-toxicity and low density, but it is plagued by low activity due to the small specific surface area and poor quantum efficiency. Morphological engineering and coupling with other materials to form hybrids have proven to be effective strategies for enabling high photocatalytic performances. Here, neodymium oxide (NdO) coupled tubular g-CN composites had been facilely synthesized by a solvent evaporation and high-temperature calcination method to realize efficient photocatalytic activity of hydrogen production and NO removal.

Noble-metal-free cobaloxime coupled with metal-organic frameworks NH-MIL-125: A novel bifunctional photocatalyst for photocatalytic NO removal and H evolution under visible light irradiation.

The novel bifunctional NH-MIL-125/Co(dmgH) composite catalysts with several different Co(dmgH) contents that can simultaneously achieve photocatalytic NO removal and hydrogen production were first prepared by a simple and convenient method. The corresponding physical and chemical properties of the composite catalysts were characterized by SEM, XRD, ESR, in situ DRIFTS, etc. The characterization results indicated that the noble-metal-free Co(dmgH), which was much cheaper and more available than most noble-metals such as Pt, could be an effective co-catalyst to accelerate the separation of photogenerated electron-hole pairs, further eventually enhancing the photocatalytic efficiency.

Highly-dispersed ruthenium precursors a self-assembly-assisted synthesis of uniform ruthenium nanoparticles for superior hydrogen evolution reaction.

For the first time, highly-dispersed ruthenium precursors a hydrogen-bond-driven melamine-cyanuric acid supramolecular complex (denoted CAM) self-assembly-assisted synthesis of uniform ruthenium nanoparticles with superior HER performance under both acidic and alkaline conditions are reported. Electrochemical tests reveal that when the current density is -10 mA cm, the optimal Ru/CNO electrocatalyst could express low overpotentials of -18 mV and -46 mV, low Tafel slopes of 46 mV dec and 100 mV dec, in 0.5 M HSO and 1.

Fe-Doped ZnO/Reduced Graphene Oxide Nanocomposite with Synergic Enhanced Gas Sensing Performance for the Effective Detection of Formaldehyde.

Here, we report the synthesis of Fe-doped ZnO/reduced graphene oxide (rGO) nanocomposites for gas sensing applications via a one-pot hydrothermal process. A wide range of characterization techniques were used to confirm the successful fabrication of the nanocomposite material and to determine the surface area, the structural and morphological properties, the chemical composition, and the purity of the samples, such as Brunauer-Emmett-Teller, X-ray diffraction, Fourier transform infrared, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, UV-vis spectroscopy, and X-ray photoelectron spectroscopy techniques. The gas sensing performance to formaldehyde was studied thoroughly in a temperature-controlled test chamber.

Recent Advances in the Catalytic Asymmetric Reactions of Oxaziridines.

Oxaziridines have emerged as powerful and elegant oxygen- and nitrogen-transfer agents for a broad array of nucleophiles, due to the remarkably high and tunable reactivities. However, the asymmetric catalysis involving oxaziridines is still in its infancy. Herein, this review aims to examine recent advances in the catalytic asymmetric transformations of oxaziridines, including oxidation, amination, cycloaddition and deracemization.

One-step preparation of a novel SrCO/g-CN nano-composite and its application in selective adsorption of crystal violet.

A novel kind of nanoparticle SrCO/g-CN was prepared using strontium carbonate (SrCO) and melamine (CHN) as raw materials one-step calcination. The formation of SrCO/g-CN was confirmed from the X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS) analysis. Its selective adsorption performance was evaluated towards crystal violet (CV), rhodamine B (RhB) and methylene blue (MB).

Two-component supramolecular gels derived from amphiphilic shape-persistent cyclo[6]aramides for specific recognition of native arginine.

A unique supramolecular two-component gelation system was constructed from amphiphilic shape-persistent cyclo[6]aramides and diethylammonium chloride (or triethylammonium chloride). This system has the ability to discriminate native arginine from 19 other amino acids in a specific fashion. Cyclo[6]aramides show preferential binding for the guanidinium residue over ammonium groups.

Tunable mesogens based on shape-persistent aromatic oligoamides: from lamellar, columnar, to nematic liquid crystalline phase.

Crescent aromatic oligoamides are shown to form thermotropic lamellar columnar, rectangular columnar, and discotic nematic mesophases according to structural variation, demonstrating their capability to serve as a new class of diverse mesogens of liquid crystals.

Synthesis of crescent aromatic oligoamides with preorganized chelating groups and their extraction towards transition metal ions.

Three crescent aromatic oligoamides 1-3 with their backbones rigidified by intramolecular hydrogen bonds were designed and synthesized. The liquid-liquid extraction by these compounds has been investigated using UV-vis spectrometry towards Pb(2+) picrate and some transition metal picrates including Ag(+), Hg(2+), Cd(2+), Zn(2+), Cu(2+), Co(2+), Ni(2+) salts. The results revealed higher selectivity and efficiency towards Hg(2+) over other metal cations; pentameric ligand 1 with six oxygen donor atoms provided the highest extractability of 83.

Stacking ionizable analytes in a sample matrix with high salt by a transient moving chemical reaction boundary method in capillary zone electrophoresis.

The paper presents a novel on-line transient moving chemical reaction boundary method (tMCRBM) for simply but efficiently stacking ionizable analytes in high-salt matrix in capillary zone electrophoresis (CZE). The powerful function and stability of the tMCRBM are elucidated with the ionizable test analytes of L-phenylalanine (Phe) and L-tryptophan (Trp) in the matrix with 85.6-165.