Discarded COVID-19 masks-derived-doped porous carbon for lithium-sulfur batteries.

Despite the high theoretical capacity and energy density of lithium-sulfur (Li-S) batteries, the development of Li-S batteries has been slow due to the poor electrical conductivity and the shuttle effect of the electrode materials, resulting in low sulfur utilization and fast long-term cycling capacity decay. The modified carbon materials are often used as sulfur hosts to significantly improve the cycling performance of the materials, but also bring high-cost issues. Here, the porous carbon materials are synthesized quickly and conveniently by the microwave cross-linking method using discarded medical masks as carbon sources and concentrated sulfuric acid as solvent.

A portable smartphone-based detection of glyphosate based on inhibiting peroxidase-like activity of heptanoic acid/Prussian blue decorated FeO nanoparticles.

The rapid and onsite detection of glyphosate in tobacco products is still a great challenge. In this study, a novel smartphone-assisted sensing platform for the detection of glyphosate has been successfully proposed through the peroxidase-like activity of FeO-based nanozyme. Heptanoic acid/Prussian blue (PB) decorated FeO nanoparticles (FeO@C/PB) could catalyze and oxidize 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS, colorless) into a steel blue colored product in the presence of hydrogen peroxide.

Effect of alginate coatings incorporated with chitinase from 'Baozhu' pear on the preservation of cherry tomato during refrigerated storage.

The effects of edible coatings based on sodium alginate with 'Baozhu' pear chitinase on the quality of cherry tomatoes during refrigerated storage were evaluated. Cherry tomatoes inoculated with were coated and stored up to 21 days. All coatings with the chitinase significantly reduced .

A flexible dual-gate hetero-synaptic transistor for spatiotemporal information processing.

Artificial synapses based on electrolyte gated transistors with conductance modulation characteristics have demonstrated their great potential in emulating the memory functions in the human brain for neuromorphic computing. While previous studies are mostly focused on the emulation of the basic memory functions of homo-synapses using single-gate transistors, multi-gate transistors offer opportunities for the mimicry of more complex and advanced memory formation behaviors in biological hetero-synapses. In this work, we demonstrate an artificial hetero-synapse based on a dual-gate electrolyte transistor that can implement spatiotemporal information integration and storage.

Identification of used as an endogenous reference gene for the qualitative and real-time quantitative polymerase chain reaction detection of .

is a fungus with rich nutritional value and good medicinal value and has accordingly become a substitute for other expensive wild edible mushrooms. In this study, for the first time, the gene was selected as an endogenous reference gene of and identified as the species-specific gene. The genes of and 18 non- species were determined by qualitative polymerase chain reaction (PCR), but no amplification was found in non- species.

Tunable Electrical Conductivity and Simultaneously Enhanced Thermoelectric and Mechanical Properties in n-type Bi Te.

The recent growing energy crisis draws considerable attention to high-performance thermoelectric materials. n-type bismuth telluride is still irreplaceable at near room temperature for commercial application, and therefore, is worthy of further investigation. In this work, nanostructured Bi Te polycrystalline materials with highly enhanced thermoelectric properties are obtained by alkali metal Na solid solution.

Mechanism of Zn salt-induced deactivation of a Cu/activated carbon catalyst for low-temperature denitration CO-SCR.

In the process of industrial flue gas denitration, the presence of heavy metals, especially Zn salts, is known to lead to the deactivation of the denitration catalysts. However, the specific mechanism of the catalyst deactivation remains unclear. In this paper, the mechanism of the ZnCl- and ZnSO-induced deactivation of low-temperature denitration catalysts in the carbon oxide (CO) selective catalytic reduction (CO-SCR) reaction was investigated using a Cu/activated carbon (AC) catalyst, in which HNO/AC was used as the carrier.

[Correlation analysis between continuous cropping obstacle of Gastrodia elata and Ilyonectria fungi and relieving strategy].

The continuous cropping obstacle of Gastrodia elata is outstanding, but its mechanism is still unclear. In this study, microbial changes in soils after G. elata planting were investigated to explore the mechanism correlated with continuous cropping obstacle.

[Isolation, identification, and pathogenicity research of brown rot pathogens from Gastrodia elata].

Brown rot is a common disease in the cultivation and production of Gastrodia elata, but its pathogens have not been fully revealed. In this study, the pathogenic fungi were isolated and purified from tubers of 77 G. elata samples with brown rot.

[Thoughts and suggestions on ecological cultivation of Gastrodia elata].

Due to the special biological characteristics, Gastrodia elata suffers from high resource consumption and low utilization rate in modern agricultural production, which significantly block the green and healthy development of this industry. Based on the theory and technology in ecological cultivation of Chinese medicinal materials, this study analyzed the challenges in ecological cultivation of G. elata, such as waste of fungus material, a few cultivation modes available, continuous cropping obstacles, frequent occurrence of diseases, and poor stability of ecological structure.

Recovery of Zn and Ge from zinc oxide dust by ultrasonic-HO enhanced oxidation leaching.

Zn and Ge were selectively extracted from zinc oxide dust (ZOD) by the ultrasonic-HO (UH) combined oxidation-leaching process. In the leaching process, the effects of the dosage of HO (6-29.5 mL), ultrasonic power, initial acidity (100-200 g L), liquid/solid mass ratio (4-8 : 1), leaching temperature (50-90 °C), and leaching time (30-240 min) on the leaching rates of Zn and Ge were studied.

Synthesis and evaluation of ion-imprinted composite membranes of Cr(vi) based on β-diketone functional monomers.

Using Cr(vi) as the imprinted ions and 2-allyl-1,3-diphenyl-1,3-propanedione (ADPD) (a compound synthesized by independent design) as the functional monomer, a series of chromium ion-imprinted composite membranes (Cr(vi)-IICMs) and corresponding non-imprinted composite membranes (NICMs) were synthesized and tested. The results showed that the Cr(vi)-IICM membrane prepared under optimal experimental conditions exhibited a high adsorption capacity towards Cr(vi) ( = 30.35 mg g) and a high imprinting factor ( = 2.

Influence of cerium doping on Cu-Ni/activated carbon low-temperature CO-SCR denitration catalysts.

In this study, to evaluate the effects of two methods for activation of nitric acid, air thermal oxidation and Ce doping were applied to a Cu-Ni/activated carbon (AC) low-temperature CO-SCR denitration catalyst. The Cu-Ni-Ce/AC catalyst was prepared using the ultrasonic equal volume impregnation method. The physical and chemical structures of Cu-Ni-Ce/AC were studied using scanning electron microscopy, Brunauer-Emmett-Teller analysis, Fourier-transform infrared spectroscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, CO-temperature programmed desorption (TPD) and NO-TPD characterisation techniques.

Synthesis of ZSM-5 zeolites from biomass power plant ash for removal of ionic dyes from aqueous solution: equilibrium isotherm, kinetic and thermodynamic analysis.

In this work, industrial biomass power plant ash was used to synthesize the ZSM-5 zeolites for the first time with the original intention to turn value-added material into wealth, and then committed to adsorption performance testing. Typical chemical structure and morphology of ZSM-5 zeolite were identified by comprehensive technologies. Uniquely, it was found that there was a low pressure hysteresis loop which was caused by crossed 10-membered rings in the N adsorption-desorption isotherm.

Effects of different ozone treatments on the storage quality and stability of fresh peeled garlic.

In order to understand their impacts on the preservation of fresh garlic, varying concentrations of ozone gas and different storage temperatures were tested for this experiment. The results demonstrated that freshly peeled garlic was best preserved by an ozone concentration of 5 ppm and storage at 4 °C compared to other treatment groups. With these optimized conditions, after 25 days of storage, the weight of garlic decreased by only 1.

Electronic, mechanical, optical and photocatalytic properties of two-dimensional Janus XGaInY (X, Y ;= S, Se and Te) monolayers.

Janus monolayers with breaking out-of-plane structural symmetries and spontaneous electric polarizations offer new possibilities in the field of two-dimensional materials. Due to the depletion of fossil fuels and serious environmental problems, there has been a growing interest in the conversion of water and solar energy into H fuels in recent years. In this research, Janus XGaInY (X, Y = S, Se and Te) monolayers are predicted as promising solar-water-splitting photocatalysts.

Novel N,Cl-doped deep eutectic solvents-based carbon dots as a selective fluorescent probe for determination of morphine in food.

In the present study, new N,Cl co-doped carbon dots (N,Cl-CDs) based on deep eutectic solvent (DES) were fabricated by a facile hydrothermal process. This fluorescent probe exhibited a good quantum yield of 14% and was applied for the sensitive and selective quantification of morphine in foods. In addition, the influence of solution pH, interaction time, system temperature, interfering substances and analogues on the determination was also investigated.

Preparation and electrochemical properties of a novel porous Ti/Sn-Sb-RuO /β-PbO/MnO anode for zinc electrowinning.

MnO coatings prepared in a sulfate system (S-MnO) and MnO prepared in a nitrate system (N-MnO) were successfully deposited on porous Ti/Sn-Sb-RuO /β-PbO substrates by electrodeposition, and their electrochemical properties were studied in detail. The bath composition plays a very important role in the MnO coating prepared by electrodeposition at a low current density. The results of scanning electron microscopy show that a Ti/Sn-Sb-RuO /β-PbO/MnO electrode has a rough morphology and the unit cell is very good.

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO electrode materials.

PbO-CoO-MnO electrodes, used in the electrowinning industry and in the degradation of organic pollutants, have demonstrated an elevated performance through macroscopic electrochemical measurements. However, few reports have investigated localized electrochemical performance, which plays an indispensable role in determining the essential reasons for the improvement of the modified material. In this study, the causes of the increase in electrochemical reactivity are unveiled from a micro perspective through scanning electrochemical microscopy (SECM), X-ray diffraction (XRD), Raman microscopy (Raman), and X-ray photoelectronic energy spectroscopy (XPS).

Moisture contents and product quality prediction of Pu-erh tea in sun-drying process with image information and environmental parameters.

In this study, moisture contents and product quality of Pu-erh tea were predicted with deep learning-based methods. Images were captured continuously in the sun-drying process. Environmental parameters (EP) of air humidity, air temperature, global radiation, wind speed, and ultraviolet radiation were collected with a portable meteorological station.

Performance study of μDMFC with foamed metal cathode current collector.

Micro Direct Methanol Fuel Cells (μDMFCs) often have application in moveable power due to their green and portable nature. In a μDMFC's structure, a current collector of the μDMFC needs to have high corrosion resistance such that the μDMFC can work for a long time in a redox reaction and respond to variable environmental conditions. To this end, four cathode current collectors were prepared.

Stability and fundamental properties of Cu O as optoelectronic functional materials.

Binary Cu O compounds have some advantages as optoelectronic functional materials, but their further development has encountered some bottlenecks, such as inaccurate bandgap values and slow improvement of photoelectric conversion efficiency. In this work, all possible stoichiometric ratios and crystal structures of binary Cu O compounds were comprehensively analyzed based on a high-throughput computing database. Stable and metastable phases with different stoichiometric ratios were obtained.

[Research progress on pesticide residues of Panax notoginseng].

Panax notoginseng is a perennial Chinese medicinal plant, which has serious continuous cropping obstacles and is prone to a variety of diseases and insect pests during the growth process. At present, the prevention and control of pests and diseases is mainly carried out through chemical pesticides, and the consequent pesticide residues of P. notoginseng have attracted much attention.

[Pesticide residues in Chinese medicinal materials and suggestions for safety].

The present study counted the frequency of detection technologies and monitoring frequency of pesticide species by frequency analysis based on the 28 258 pieces of data on pesticide content of Chinese medicinal materials in CNKI, calculated the detection rate and exceeding rate of different types of pesticides, and systematically analyzed the pesticide residue pollution of Chinese medicinal materials. The results showed that there were 40 types of pesticides with detection rates higher than 10%, where new pesticides such as organochlorines and nicotine accounted for 55%, and organic phosphorus, pyrethroids, and carbamates accounted for 17.5%, 15.