Rational design of covalent organic frameworks/NaTaO S-scheme heterostructure for enhanced photocatalytic hydrogen evolution.

As a typical perovskite material, NaTaO has been regarded as a potential catalyst for photocatalytic hydrogen evolution (PHE) process, due to its excellent photoelectric property and superior chemical stability. However, the photocatalytic activity of pure NaTaO was largely restricted by its poor visible-light absorption ability and rapid recombination of photogenerated charge carriers. Therefore, a covalently bonded TpBpy covalent organic framework (COF)/NaTaO (TpBpy/NaTaO) heterostructure was designed and synthesized by the post modification strategy with (3-aminopropyl) triethoxysilane (APTES) and the in situ solvothermal process.

Facile construction of a robust CuS@NaNbO nanorod composite: A unique p-n heterojunction structure with superior performance in photocatalytic hydrogen evolution.

The construction of heterojunctions is commonly regarded as an efficient way to promote the production of hydrogen via photocatalytic water splitting through the enhancement of interfacial interactions. The p-n heterojunction is an important kind of heterojunction with an inner electric field based on the different properties of semiconductors. In this work, we reported the synthesis of a novel CuS/NaNbO p-n heterojunction by depositing CuS nanoparticles on the external surface of NaNbO nanorods, using a facile calcination and hydrothermal method.

Robust S-scheme hierarchical Au-ZnInS/NaTaO: Facile synthesis, superior photocatalytic H production and its charge transfer mechanism.

Designing Step-scheme (S-scheme) heterojunction with the directional charge transfer pathway has been considered as a promising strategy for realizing effective spatial separation of photo-generated carriers in a photocatalytic system by utilizing broadband solar energy. Herein, the novel and ternary S-scheme heterojunction photocatalysts were fabricated by embedding Au nanoparticles (NPs) on the surface of ZnInS/NaTaO composites through a facile two-step hydrothermal method for the first time. As expected, it showed an enhanced hydrogen evolution rate of 11404 μmol g h, which was approximately 58 and 10 times higher than that of the pristine NaTaO nanocubes (197 μmol g h) and ZnInS microspheres (1180 μmol g h) under simulated sunlight irradiation, respectively.

Application of the Cycle Management Model in Improving Outpatient Appointment Services.

To explore the application of plan-do-check-action (PDCA) cycle management model in the management outpatient appointment, and improve the efficiency of outpatient appointment services. The data of outpatients from January 2019 to December 2020 were collected from a tertiary class B general hospital affiliated to a university in Shanghai. Through the investigation and analysis of the current situation, the reasons were found for the low rate of outpatient appointment.

Embedding indium nitride at the interface of indium-oxide/indium-zinc-sulfide heterostructure with enhanced interfacial charge transfer for high photocatalytic hydrogen evolution.

Enhancing the interfacial charge carriers transfer efficiency is important for designing photocatalysts with excellent hydrogen evolution performance. In this work, we have successfully constructed a InO@InN/ZnInS ternary heterostructure by embedding InN at the interface of thin-layered ZnInS and tubular InO derived from metal-organic frameworks (MOFs) nanorods for the first time. The InN can not only adjust the energy band structure of InO, but also boost the photogenerated charge carriers transfer at the interface of InO and ZnInS.

Which Is More Efficient in Promoting the Photocatalytic H Evolution Performance of g-CN: Monometallic Nanocrystal, Heterostructural Nanocrystal, or Bimetallic Nanocrystal?

Generally, an excellent cocatalyst could promote the photocatalytic hydrogen (H) evolution performance of g-CN significantly. Herein, a superior cocatalyst of gold-platinum (AuPt) nanocrystal with an ultralow content of Pt was successfully decorated on carbon self-doping g-CN nanosheets (AuPt/CCN) via a facile photodeposition route. The corresponding Pt/CCN, Au/CCN, Au/Pt/CCN, and Pt/Au/CCN were also prepared for comparison.

Hierarchical fabrication of hollow CoP nanocages coated with ZnInS thin layer: Highly efficient noble-metal-free photocatalyst for hydrogen evolution.

The directional synthesis of transition metal phosphides was considered to be an effective strategy to solve the overdependence of noble metals on photocatalytic hydrogen evolution (PHE) reactions. Inspiringly, this work reported a facile method for constructing hollow CoP nanocages (CoP NCGs) that derived from ZIF-67 by calcining and phosphiding procedure in nitrogen atmosphere to act as non-noble metal cocatalysts. Followed with further coating thin-layered ZnInS (ZIS) on the surface of CoP NCGs through a hydrothermal reaction, the hierarchical robust CoP/ZnInS nanocages (CoP/ZIS NCGs) were then delicately fabricated as efficient photocatalysts for PHE reactions.

Ordered Mesoporous Ni-P Amorphous Alloy Nanowire Arrays: High-Efficiency Catalyst for Production of Polyol from Sugar.

Mesoporous metals have shown significant potential for use in catalysis; however, controllably synthesizing highly ordered mesoporous amorphous alloys is a serious challenge. In this paper, a synthesis strategy was developed for generating ordered amorphous alloy nanowire arrays from mesoporous Ni-P by combining mesoporous silica templating with electroless plating. Mesoporous silica is externally grafted with -CH and internally covered with -NH acting as an efficient template, ensuring the formation of Ni-P nanowires inside the pore channels and endowing the final product with an ordered mesoporous array structure.

An efficient defect engineering strategy to enhance catalytic performances of CoO nanorods for CO oxidation.

Catalytic oxidation of CO at ambient temperature is an important reaction for many environmental applications. Here, we employed a defect engineering strategy to design an extraordinarily effective Sn-doped CoO nanorods (NRs) catalyst for CO oxidation. Our combined theoretical and experimental data demonstrated that Co in the lattice of CoO were substituted by Sn.

Mesoporous Metal-Metalloid Amorphous Alloys: The First Synthesis of Open 3D Mesoporous Ni-B Amorphous Alloy Spheres via a Dual Chemical Reduction Method.

Selective hydrogenation of nitriles is an industrially relevant synthetic route for the preparation of primary amines. Amorphous metal-boron alloys have a tunable, glass-like structure that generates a high concentration of unsaturated metal surface atoms that serve as active sites in hydrogenation reactions. Here, a method to create nanoparticles composed of mesoporous 3D networks of amorphous nickel-boron (Ni-B) alloy is reported.