Low-Temperature NO Gas-Sensing System Based on Metal-Organic Framework-Derived InO Structures and Advanced Machine Learning Techniques.

In the bustling metropolis of tomorrow, where pollution levels are a constant concern, a team of innovative researchers embarked on a quest to revolutionize air quality monitoring. In pursuit of this objective, this study embarked on the synthesis of indium oxide materials via a straightforward solvothermal method purposely for NO detection. Through meticulous analysis of their gas-sensing capabilities, a remarkable discovery came to light.

Engineering "three-in-one" fluorescent nanozyme of Ce-Au NCs for on-site visual detection of Hg.

Hg contamination poses a serious threat to the environment and human health. Although gold nanoclusters (Au NCs) have been utilized as fluorescence probes or colorimetric nanozymes for performing Hg assays by using a single method, designing multifunctional nanoclusters as fluorescent nanozyme remains challenging. Herein, Ce-aggregated gold nanoclusters (Ce-Au NCs) were reported with "three in one" functions to generate strong fluorescence, excellent peroxidase-like activity, and the highly specific recognition of Hg via its metallophilic interaction.

Stable COreduction under natural air on Ni-Sn hydroxide photocatalyst with dynamic renewable oxygen vacancies.

Advanced photocatalysts are highly desired to activate the photocatalytic COreduction reaction (CORR) with low concentration. Herein, the NiSn(OH)with rich surface lattice hydroxyls was synthesized to boost the activity directly under the natural air. Results showed that terminal Ni-OH could serve as donors to feed protons and generate oxygen vacancies (V), thus beneficial to convert the activated CO(HCO) mainly into CO (5.

Composite interfaces of g-CN fragments loaded on a Cu substrate for CO reduction.

Designing an electrocatalyst with high efficiency and product selectivity is always crucial for an electrocatalytic CO reduction reaction (CORR). Inspired by the great progress of two-dimensional (2D) nanomaterials growing on Cu surfaces and their promising CORR catalytic efficiencies at their interfaces, the unique performance of Cu-based 2D materials as high-efficiency and low-cost CORR electrocatalysts has attracted extensive attention. Herein, based on density functional theory (DFT) calculations, we proposed a composite structure of graphitic carbon nitride (g-CN) fragments loaded on a Cu surface to explore the CORR catalytic property of the interface between g-CN and the Cu surface.

ZnO-Au@ZIF-8 core-shell nanorod arrays for ppb-level NO detection.

ZnO-Au@ZIF-8 core-shell heterostructures were prepared by ZIF-8 encapsulation of sacrificial ZnO-Au nanorods. Because of the catalytic activity of the Au nanoparticles and the sieving effects of the ZIF-8, the ZnO-Au@ZIF-8 heterostructures showed an outstanding response of 1.8 to 5 ppb NO, and exhibited higher selectivity, stability, anti-humidity and fast response and recovery properties.

A 2D-0D-2D Sandwich Heterostructure toward High-Performance Room-Temperature Gas Sensing.

The construction of two-dimensional (2D) van der Waals (vdW) heterostructures over black phosphorus (BP) has been attracting significant attention to better utilize its inherent properties. The sandwich of zero-dimensional (0D) noble metals within BP-based vdW heterostructures can provide efficient catalytic channels, modulating their surface redox potentials and therefore inducing versatile functionalities. Herein, we realize a 2D WS-Au-BP heterostructure, in which Au nanoparticles are connected between BP and WS via ionic bonds.

Enhance Hydrogen Evolution Reaction Performance via Double-Stacked Edges of Black Phosphorene.

Based on the density functional theory (DFT) calculations, we explored the structures and HER catalytic properties of reconstructed and double-stacked black phosphorene (BP) edges. Ten bilayer BP edges were constructed by the double stacking of three typical monolayer edges, i.e.

High Detectivity of PbS Films Deposited on Quartz Substrates: The Role of Enhanced Photogenerated Carrier Separation.

PbS films grown on quartz substrates by the chemical bath deposition method were annealed in an O atmosphere to investigate the role of oxygen in the sensitization process at different annealing temperatures. The average grain size of the PbS films gradually increased as the annealing temperature increased from 400 °C to 700 °C. At an annealing temperature of 650 °C, the photoresponsivity and detectivity reached 1.

Realizing the Ultralow Lattice Thermal Conductivity of CuSbSe Compound via Sulfur Alloying Effect.

CuSbSe is a potential p-type thermoelectric material, distinguished by its earth-abundant, inexpensive, innocuous, and environmentally friendly components. Nonetheless, the thermoelectric performance is poor and remains subpar. Herein, the electrical and thermal transport properties of CuSbSe were synergistically optimized by S alloying.

Exploring the gas-sensing properties of MOF-derived TiN@CuO as a hydrogen sulfide sensor.

In an effort to develop a long-lasting gas sensor, this article presents titanium nitride (TiN) as a potential substitute sensitive material in conjunction with (copper(II) benzene-1,3,5-tricarboxylate) Cu-BTC-derived CuO. The work focused on the gas-sensing characteristics of TiN/CuO nanoparticles in detecting HS gas at various temperatures and concentrations. XRD, XPS, and SEM were utilized to analyze the composites with varied Cu molar ratios.

Multifunctional Au/Hydroxide Interface toward Enhanced C-C Coupling for Solar-Driven CO Reduction into CH.

The high-grade C products from CO photoreduction are limited by the kinetic bottleneck. Herein, a multifunctional Au/hydroxide interface was put forward to improve the C-C coupling. As a prototype, the synthesized Au/ZnSn(OH) tuned the CO generation and afforded about 50% electrons toward CH selectivity.

Quasi-one-dimensional phosphorene nanoribbons grown on silicon by space-confined chemical vapor transport.

Phosphorene nanoribbons (PNRs) combine the flexibility of one-dimensional (1D) nanomaterials with the large specific surface area and the edge and electron confinement effects of two-dimensional (2D) nanomaterials. In spite of the substantial advances in bulk black phosphorus (BP) manufacturing, achieving PNRs without degradation is still a big challenge. In this work, we present a strategy for the space-confined chemical vapor transport synthesis of quasi-one-dimensional surface-passivated monocrystalline PNRs on a silicon substrate.

CuO-decorated MOF derived ZnO polyhedral nanostructures for exceptional HS gas detection.

Considering that HS is a hazardous gas that poses a significant risk to people's lives, research into HS gas sensors has garnered a lot of interest. This work reports a CuO/ZnO multifaceted nanostructures(NS) created by heat treating Cu/ZIF-8 impregnation precursors, and their microstructure and gas sensing characteristics were examined using various characterization techniques (XRD, XPS, SEM, TEM, and BET). The as-prepared hollow CuO/ZnO multifunctional nanostructures had a high gas response value (425@50 ppm HS gas), quick response and recovery times (57/191s @20 ppm), a low limit of detection (1.

Metal-organic frameworks-derived InO/ZnO porous hollow nanocages for highly sensitive HS gas sensor.

The detection of hydrogen sulfide (HS) is critical because of its potential harm and widespread presence in the oil and gas sectors. The zeolitic imidazolate framework-8 (ZIF-8) derived ZnO nanostructures manufactured as gas sensors have exceptional sensitivity and selectivity for HS gas. In/Zn-ZIF-8 template material was synthesized by a simple one-step co-precipitation method followed by thermal annealing in air.

Facile fabrication of nanoflower-like WO/WS heterojunction for highly sensitive NO detection at room temperature.

Realizing efficient detection of ultra-low concentrations of hazardous gases contributes to air pollution monitoring, ecosystem and human health protection. Herein, we firstly fabricated the nanoflower-like WO/WS composites by a facile process to highly sensitively detect NO at room temperature. The WO content in the WO/WS composites can be adjusted by altering the calcination temperature, and the WO nanoparticles disperse uniformly on the WS surface, forming the WO/WS heterojunction.

Atomic Level Defect Structure Engineering for Unusually High Average Thermoelectric Figure of Merit in n-Type PbSe Rivalling PbTe.

Realizing high average thermoelectric figure of merit (ZT ) and power factor (PF ) has been the utmost task in thermoelectrics. Here the new strategy to independently improve constituent factors in ZT is reported, giving exceptionally high ZT and PF in n-type PbSe. The nonstoichiometric, alloyed composition and resulting defect structures in new Pb Se Te (x = 0-0.

Enhanced NO gas-sensing performance by core-shell SnO/ZIF-8 nanospheres.

Timely detection of harmful, poisonous and air pollutant gases is of vital importance to the protection of human beings from exposure to rigorous gases. The development of gas-sensing devices based on sphere-like porous SnO/ZIF-8 nanocomposites is required to overcome this challenge. Nanostructures with high surface area, more porosity and hollow interior provide plenty of active cites for high responses in metal oxide gas sensors.

Efficient detection of hazardous HS gas using multifaceted CoO/ZnO hollow nanostructures.

The rapid increases in environmental hazardous gases have laid dangerous effects on human health. The detection of such pollutants gases is mandatory using various optimal techniques. In this paper, porous multifaceted CoO/ZnO nanostructures are synthesized by pyrolyzing sacrificial template of core-shell double zeolitic imidazolate frameworks (ZIFs) for gas sensing applications.

Theoretical Study on P-coordinated Metal Atoms Embedded in Arsenene for the Conversion of Nitrogen to Ammonia.

The conversion of gaseous N to ammonia under mild conditions by artificial methods has become one of the hot topics and challenges in the field of energy research today. Accordingly, based on density function theory calculations, we comprehensively explored the d-block of metal atoms (Ti, V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Ru, Rh, W, and Pt) embedded in arsenene (Ars) for different transition systems of phosphorus (P) coordination as potential electrocatalysts for N reduction reaction (NRR). By adopting a "two-step" strategy with stringent NRR catalyst screening criteria, we eventually selected Nb@P-Ars as a research object for a further in-depth NRR mechanism study.

Single atom-doped arsenene as electrocatalyst for reducing nitrogen to ammonia: a DFT study.

Due to the wide application of NH3 in the energy and chemical industry, the rational design of a highly efficient and low-cost electrocatalyst for nitrogen fixation at moderate conditions is highly desirable to meet the increasing demand for sustainable energy production in the modern society. Herein, we have systematically studied the catalytic performance of transition metal (TM) atom (i.e.

Solution-Processed SbSe on TiO Thin Films Toward Oxidation- and Moisture-Resistant, Self-Powered Photodetectors.

Semiconductor-sensitized TiO thin films with long-term air stability are attractive for optoelectronic devices and applications. Herein, we demonstrate the potential of the TiO thin film (∼800 nm in thickness) sensitized with a SbSe layer (∼350 nm) grown from solution spin coating and processed by annealing recrystallization at 300 °C for high-performance optical detection. The type-II band alignment, p-SbSe/n-TiO heterojunction, and narrow band gap of SbSe (∼1.

Construction of hierarchical trimetallic organic framework leaf-like nanostructures derived from carbon nanotubes for gas-sensing applications.

Unique trimetallic organic material (TMOM)-based nanostructures combined with the new architectures of metal-organic frameworks (MOFs) are promising candidates for gas-sensing applications. This work is the first to successfully convert MOF nanomaterials into nano-porous carbon through carbon nanotubes (CNT) catalytic reaction via a simple and facile hydrothermal method. The leaf-like nanostructures exhibit a high surface-to-volume ratio of 363 m g.

Integration of multi-scale defects for optimizing thermoelectric properties of n-type CuCdFeS (x = 0-0.1).

The performance of thermoelectric (TE) materials is strongly influenced by multi-scale defects. Some defects can improve the TE performance but some are unfavorable. Therefore, the multi-scale defects need to be integrated rationally to enhance the TE properties.

Na-Ions Diffusion Impacts Supercapacitor Performance for Amaryllis-like NiCoO Nanostructures.

NiCoO nanomaterials with exceptional electrochemical performances are synthesized via a simple and low-cost method. The synthesized nanostructures exhibit a high specific surface area of 121.52 m g and excellent specific capacitance of 2498.

An Overlapped Nano-Fe₂O₃/TiO₂ Composite Coating on Activated Carbon Fiber Membrane with Enhanced Photocatalytic Performance.

Treatment of high concentration organic wastewater has always been a difficult problem in the field of water purification due to its high cost, low efficiency, long processing cycle and possible second pollution. An overlapped nano-Fe₂O₃/TiO₂@activated carbon fiber membrane composite was successfully prepared by hydrothermal loading method. Nano-rod-like TiO₂ and columnar Fe₂O₃ polyhedrals overlapped and formed a composite coating on the surface of activated carbon fiber membrane.