A Low-Cost and Green Zinc-Iron Battery Achieved by Ethaline Deep Eutectic Solvent.

Deep eutectic solvents (DESs) were considered as a potential electrolyte because of their low price, harmless to environment and wider electrochemical window potential compared to water. In this work, Fe(III)/Fe(II) and Zn(II)/Zn redox couples were used as the positive and negative active materials, respectively, in a DES system using choline chloride and ethylene glycol in a molar ratio of 1 : 2 (ethaline). The possible working mechanism of the battery was studied by cyclic voltammetry, spectroscopic and simulation methods.

A novel three-dimensional porous Ag/TiO hybrid aerogels with high dense hot spot as effective SERS substrate for ultrasensitive detection.

This research focuses on preparing a series of new TiO/Ag hybrid aerogels with varying TiO contents, and demonstrates their application as ultrasensitive SERS substrates. The synthesized TiO/Ag hybrid aerogels exhibited excellent SERS behavior when detecting 4-Mercaptobenzoic acid (4-MBA), and the calculated SERS enhancement factor (EF) was 6.34 × 10.

Achieving Non-Interfacial Blocking Zinc Ion Transport Based on MOF Derived Manganese Oxides and Amorphous Carbon Hybrid Materials.

How to coordinate electron and ion transport behavior across scales and interfaces within ion battery electrodes? The exponential increase in surface area observed in nanoscale electrode materials results in an incomprehensibly vast spatial interval. Herein, to address the problems of volume expansion, dissolution of cathode material, and the charge accumulation problem existing in manganiferous materials for zinc ion batteries, metal organic framework is utilized to form the architecture of non-interfacial blocking ~10 nm MnO nanoparticles and amorphous carbon hybrid electrode materials, demonstrating a high specific capacity of 361 mAh g (0.1 A g), and excellent cycle stability of 105 mAh g after 2000 cycles under 1 A g.

Multifunctional Luminescent 3D Ln-MOFs with High Sensitivity for Trace Detection of Micronutrients.

The synthesis of two versatile fluorescent metal-organic frameworks (MOFs), [Eu(4-NCP)(1,4-bdc)]·0.5HO () and [Eu(4-NCP)(4,4'-bpdc)]·0.75HO () (HNCP = 2-(4-carboxyphenyl)imidazo(4,5-)-(1,10)phenanthroline, 1,4-Hbdc = benzene-1,4-dicarboxylic acid, 4,4'-Hbpdc = 4,4'-biphenyldicarboxylic acid), was carried out using a hydrothermal method.

Atomic-scale imaging of ytterbium ions in lead halide perovskites.

Lanthanide-doped lead halide perovskites have demonstrated great potential for photoelectric applications. However, there is a long-standing controversy about the existence of lanthanide ions, e.g.

Controllable preparation of TiCT/Ag composite as SERS substrate for ultrasensitive detection of 4-nitrobenzenethiol.

Currently, metal carbonitride (MXene) has been identified as a hot research topic in the research area of surface-enhanced Raman scattering (SERS). In this study, TiCT/Ag composite was fabricated as SERS substrate with different Ag contents. The fabricated TiCT/Ag composites show good SERS behavior by detecting 4-Nitrobenzenethiol (4-NBT) probe molecules.

Evaluation of the potential of recovering various valuable elements from a vanadiferous titanomagnetite tailing based on chemical and process mineralogical characterization.

In order to evaluate the potential of recovering various valuable elements from vanadiferous titanomagnetite tailing (VTMT), the chemical and process mineralogical characterization of VTMT were investigated in this study by various analytical techniques such as XRF, XRD, optical microscopy, SEM, EDS, and AMICS. It was found that VTMT is a coarser powder in general; about 50% of the particle size is greater than 54.30 μm.

Electrodeposition of Bi from Choline Chloride-Malonic Acid Deep Eutectic Solvent.

Deep eutectic solvent (DES) has been widely used in the field of metal electrodeposition as an economical and environmentally friendly green solvent. Metallic bismuth films were prepared by electrodeposition from choline chloride-malonic acid (ChCl-MA) deep eutectic solvent (DES) containing BiCl. Fourier transform infrared (FTIR) spectroscopy and Raman spectroscopy were used to study the structure of ChCl-MA-BiCl, and the results showed that Bi(III) was in the form of [BiCl] ions.

Tunable multiple light emissions of core-shell structures based on rare earth ions doped on the surfaces of organic cocrystals.

The charge transfer (CT) interactions play a vital role in tuning the luminescence of organic crystals. The enhanced energy transfer (ET) effect in rare earth (RE) ions is a significant method to achieve long-lifetime fluorescence. These studies are of great significance in the fields of photoelectric functional materials.

V-Doped Potassium Ferrite as an Efficient Trifunctional Catalyst for Large-Current-Density Water Splitting and Long-Life Rechargeable Zn-Air Battery.

Developing non-noble metal catalyst with super trifunctional activities for efficient overall water splitting (OWS) and rechargeable Zn-air battery (ZAB) is urgently needed. However, catalysts with excellent oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER) performances are relatively few. Although metal-ionic-conductor KFeO (KFO) can output large current densities for OER/HER even in 10.

Tailored FTO/Ag/ZIF-8 structure as SERS substrate for ultrasensitive detection.

In this work, a series of F-doped SnO/Ag/zeolite imidazole framework (FTO/Ag/ZIF-8) sandwich structure have been successfully fabricated via a magnetic sputtering method and serve as surface-enhanced Raman scattering (SERS) substrate. The magnetic sputtering time of Ag was adjusted to obtain the optimal SERS substrate. The commonly used 4-mercaptobenzoic acid (4-MBA) molecules was selected for the SERS experiment.

A novel method for dearsenization from arsenic-bearing waste slag by selective chlorination and low-temperature volatilization.

Because of the widespread presence of arsenic in various smelting waste slags, it not only hinders the recycling and utilization of waste slag, but also causes serious pollution to the ecological environment. In this study, AsO, the main form of arsenic in non-ferrous metal smelting slag, was used as the research object, and FeCl was used as the chlorination agent. AsO was selectively chlorinated to low-boiling-point AsCl gas which was easy to be volatilized and removed by chlorination roasting.

Encapsulating silicon particles by graphitic carbon enables High-performance Lithium-ion batteries.

Silicon combines the advantages of high theoretical specific capacity, low potential and natural abundance, which exhibits great promise as an anode for lithium-ion batteries. However, the main challenges associated with Si anode are continuous volume expansion upon cycling and intrinsic low electronic conductivity, leading to sluggish reaction kinetics and rapid capacity fading. Herein we propose a novel in-situ self-catalytic strategy for the growth of highly graphitic carbon to encapsulate Si nanoparticles by chemical vapor deposition, where the magnesiothermic reduction byproducts are used as templates and catalysts for the formation of three-dimensional (3D) conductive network architecture.

Facile fabrication of PS/CuS/Ag sandwich structure as SERS substrate for ultra-sensitive detection.

In this work, a serials of PS(polystyrene)/CuS/Ag sandwich substrates were successfully constructed using the magnetic sputtering method by adjusting the Ag sputtering time (0 min, 2 min, 4 min, 6 min, 8 min and 10 min) and used as the surface-enhanced Raman scattering (SERS) substrates. When the Ag sputtering time was 6 min, the strongest SERS signal was observed. The optimized SERS substrate has strong SERS activity on 4-mercaptobenzoic acid (4-MBA), the minimum detection limit was 10 M and the enhancement factor was as high as 4.

Effect of TiO on the Sintering Behavior of Low-Grade Vanadiferous Titanomagnetite Ore.

Low-grade vanadiferous titanomagnetite ore (LVTM) is as an important mineral resource for sintering ore manufacturing. Furthermore, TiO has a significant effect on the sintering process of iron ore fines. The effects of TiO on the metallurgical properties, microstructure, and mineral composition of LVTM sinter were investigated by sintering pot tests, X-ray diffraction (XRD), scanning electron microscopy (SEM), and mineral phase microanalysis.

High-efficiency charge transfer on SERS-active semiconducting KTiO nanowires enables direct transition of photoinduced electrons to protein redox centers.

Photoinduced charge transfer (PICT) plays a crucial role in the chemical mechanism of surface-enhanced Raman scattering (SERS), in which small organic molecules are generally used as probes. Herein, semiconducting KTiO nanowires (NWs) are synthesized and are found to exhibit high SERS activity probed by 4-mercaptobenzoic acid (4-MBA). Density functional theory (DFT) calculations reveal high-efficiency CT on the KTiO nanowires.

Construction of MOF-shell porous materials and performance studies in the selective adsorption and separation of benzene pollutants.

Metastable Cu2O is an attractive material for the architectural design of integrated nanomaterials. In this context, Cu2O was used as the sacrificial agent to form the core-shell structure of Cu2O@HKUST-1 by in situ growth technology. The MOFs with BOPs adsorption property were gathered together by a Cu2O etching method, and the hollow structure of the HKUST-1 shell material with fast BOP adsorption was successfully constructed.

Significant influences of TiO crystal structures on NO and HONO emissions from the nitrates photolysis.

The emissions of NO and HONO from the KNO photolysis in the presence of TiO were measured using a round-shape reactor coupled to a NO analyzer. TiO played important roles in the emission flux density of NO (R) and HONO (R), depending on crystal structures and mass ratios of TiO. R and R significantly decreased with increasing the rutile and anatase mass ratios from 0 to 8 and 0.

A Zn-Ce Redox Flow Battery with Ethaline Deep Eutectic Solvent.

Compared with conventional aqueous and ionic liquid electrolytes, deep eutectic solvent (DES) are considered as electrolyte for redox flow batteries because they have a wider electrochemical window and relatively low price. In this study, Ce /Ce and Zn /Zn redox couples are used as the positive and negative active materials, respectively, in an electrolyte consisting of choline chloride ethylene glycol (ethaline). The structure of Ce in the positive electrolyte is inferred through spectrum detection.

Heterogeneous photochemical uptake of NO on the soil surface as an important ground-level HONO source.

Nitrous acid (HONO) production from the heterogeneous photochemical reaction of NO on several Chinese soils was performed in a cylindrical reactor at atmospheric pressure. The NO uptake coefficient (γ) and HONO yield (Y) on different soils were (0.42-5.

Perovskite-type CaMnO anode material for highly efficient and stable lithium ion storage.

Lithium ion batteries are attracting ever increasing attention due to their advantages of high energy/ power density, environmental friendly, lifetime and low cost. As a star in the field of materials and energy, perovskites have received extensive attention due to their attracting physical and chemical properties. Herein, CaMnO, one material from the perovskite family is introduced as a novel anode material for lithium ion batteries, and its electrochemical performance at different temperatures is systematically investigated.

New insight into SPR modulating by two-dimensional correlation spectroscopy: the case for an Ag/ITO system.

The localized surface plasmon resonance (LSPR) of Ag/indium tin oxide (ITO)@polystyrene (PS) in the visible-NIR region was dependent on the tuning of the carrier density caused by adjusting the thickness of the ITO layer. The two-dimensional correlation spectroscopy (2D-COS) results of the dependence of each component in the UV-vis-NIR spectrum on the carrier density response enabled the successful exploration of the carrier transport process.

Highly sensitive SERS behavior and wavelength-dependence charge transfer effect on the PS/Ag/ZIF-8 substrate.

In this work, the monodisperse polystyrene colloidal particles/Ag/zeolite imidazole framework (PS/Ag/ZIF-8) substrate was successfully prepared and served as SERS active substrate. The composition, structure and morphology of the PS/Ag/ZIF-8 substrates were studied by XRD, SEM, UV-Vis and XPS measurements. The main finding of this study was that the as-prepared PS/Ag/ZIF-8 substrate could exhibit outstanding SERS property when 4-mercaptobenzoic acid (4-MBA) was used as the SERS probes.

Photoenhanced heterogeneous reaction of O with humic acid: Focus on O uptake and changes in the composition and optical property.

Heterogeneous photochemical reaction of O with humic acid (HA) under simulated sunlight was performed using a flow tube reactor coupled to an O analyzer at ambient pressure. It was confirmed that light significantly enhanced the uptake of O on HA. The initial uptake coefficient (γ) and the steady-state uptake coefficient (γ) of O under irradiation increased by 1.

Improved Charge Transfer Contribution by Cosputtering Ag and ZnO.

A two-dimensional polystyrene microsphere array cosputtered with Ag and ZnO was designed for evaluating surface-enhanced Raman scattering (SERS) activity. The surface plasmon resonance (SPR) and SERS properties were significantly changed by the introduction of ZnO into the Ag film. By increasing the Ag sputtering power, a redshift of the SPR peak was obtained.