Photoelectrochemical detection of Cu based on ZnInS/WO Z-scheme heterojunction.

A one-step hydrothermal technique was utilized to generate WO nanosheets on fluorine-doped tin oxide (FTO) (WO/FTO), which were subsequently modified with ZnInS microspheres to create a Z-scheme heterojunction ZnInS/WO/FTO electrode for Cu detection. The heterojunction exhibited excellent photoelectric conversion efficiency, which was nearly 2.5-fold and 5.

Tetrabutylammonium-chloride-glycerol of deep eutectic solvent functionalized MnO: a novel mimic enzyme for the quantitative and qualitative colorimetric detection of L-cysteine.

L-Cysteine is a common amino acid that plays an important role in human livelihood and production. Therefore, a novel method for the simultaneous quantitative and qualitative determination of L-cysteine by a colorimetric detection system is proposed. As a viable oxidase mimic, [N]Cl-G/MnO, which consisted of MnO nanosheets functionalized by a tetrabutylammonium chloride-glycerol ([N]Cl-G) based deep eutectic solvent (DES) was fabricated.

Few-layer BiOCO nanosheets derived from electrochemically exfoliated bismuthene for the enhanced photocatalytic degradation of ciprofloxacin antibiotic.

Few-layer two-dimensional (2D) BiOCO nanosheets with a thickness of 4-5 nm were successfully fabricated electrochemical exfoliation, followed by an exposure to ambient conditions. The formation process for these nanosheets was explored through X-ray diffractometer. The photocatalytic capacity of 2D BiOCO nanosheets was investigated towards the degradation of ciprofloxacin.

Nutrients regeneration pathway, release potential, transformation pattern and algal utilization strategies jointly drove cyanobacterial growth and their succession.

In order to better understand the contribution of nutrients regeneration pathway, release potential and transformation pattern to cyanobacterial growth and succession, 7 sampling sites in Lake Chaohu with different bloom degree were studied every two months from February to November 2018. The carbon, nitrogen (N) and phosphorus (P) forms or fractions in surface, interstitial water and sediments as well as extracellular enzymatic activities, P sorption, specific microbial abundance and community composition in sediments were analyzed. P regeneration pathway was dominated by iron-bound P desorption and phosphorus-solubilizing bacteria solubilization in severe-bloom and slight-bloom area respectively, which both resulted in high soluble reactive phosphorus (SRP) accumulation in interstitial water.

Phosphorus supply pathways and mechanisms in shallow lakes with different regime.

In order to better understand the pathways and mechanisms of phosphorus (P) supply under different regimes, 12 sampling sites from 4 basins of 2 lakes were studied seasonally from October 2017 to July 2018 in Wuhan City, China. Concentrations of different forms of P and nitrogen (N) in surface and interstitial water, contents of carbon (C), N, P and iron (Fe) compounds as well as related extracellular enzymatic activities, phosphorus sorption, abundance of phosphorus-solubilizing bacteria (PSB), total and specific (containing phosphatase gene) microbial community composition in sediments were analyzed. In lakes with macrophyte dominance, P supply pathway from sediment to water column was blocked.

Heterogeneous Fenton degradation of ofloxacin catalyzed by magnetic nanostructured MnFeO with different morphologies.

Magnetic nanostructured MnFeO with different morphologies, synthesized via chemical co-precipitation and hydrothermal method, was assayed as heterogeneous Fenton catalysts. The as-prepared MnFeO catalysts were thoroughly characterized by various characterization methods, such as X-ray diffraction (XRD), N adsorption-desorption, transmission electron microscopy (TEM), magnetic hysteresis loops, temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS). The catalytic activity of MnFeO catalysts was evaluated in the heterogeneous Fenton degradation of ofloxacin (OFX).

Efficient adsorption of Hg(II) from aqueous solution by N, S co-doped MnFeO@C magnetic nanoparticles.

N, S co-doped MnFeO@C magnetic nanoparticles were successfully synthesized by a simple method involving the preparation of MnFeO nanoparticles and subsequent pyrolysis treatment. The physical and chemical properties of MnFeO, MnFeO@C and MnFeO@C-NS nanoparticles were characterized by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), transmission electron microscopy (TEM), N adsorption-desorption and the pH at the point of zero charge. Their performances in the adsorption of Hg(II) from water were investigated.

Magnetic core-shell-structured FeO@CeO as an efficient catalyst for catalytic wet peroxide oxidation of benzoic acid.

A magnetic core-shell-structured FeO@CeO catalyst was prepared by a simple solvothermal method and applied in the solid state for catalytic wet peroxide oxidation (CWPO) of benzoic acid. The obtained catalyst was characterized by N adsorption-desorption, X-ray diffraction (XRD), magnetic measurements, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The experimental results showed that FeO@CeO possessed superior catalytic efficiency for CWPO of benzoic acid than that of FeO.

Efficient adsorption of benzoic acid from aqueous solution by nitrogen-containing activated carbon.

Adsorption is an efficient treatment process to remove benzoic acid from aqueous solution. In this study, nitrogen-containing surface groups were introduced onto activated carbon (AC) surface by modification with ammonium hydroxide, ammonium carbonate, melamine or urea. The nitrogen-containing AC samples were characterized using N adsorption-desorption, Boehm titration, determination of the pH of the point of zero charge (pH) and X-ray photoelectron spectroscopy.

Catalytic wet peroxide oxidation of benzoic acid over Fe/AC catalysts: Effect of nitrogen and sulfur co-doped activated carbon.

The parent activated carbon (ACP) was modified with urea and thiourea to obtain N-doped activated carbon (ACN) and N, S co-doped activated carbon (ACNS), respectively. Iron supported on activated carbon (Fe/ACP, Fe/ACN and Fe/ACNS) were prepared and worked as catalyst for catalytic wet peroxide oxidation of benzoic acid (BA). The catalysts were characterized by N adsorption-desorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM), and their performance was evaluated in terms of benzoic acid and TOC removal.

Mercury (II) adsorption from aqueous solution using nitrogen and sulfur co-doped activated carbon.

Activated carbon (AC) was modified with urea, thioglycolic acid and thiourea to obtain nitrogen doped activated carbon (ACN), sulfur doped activated carbon (ACS) and nitrogen and sulfur co-doped activated carbon (ACNS), respectively. The AC samples were characterized by elemental analysis, N adsorption-desorption, determination of the pH of the point of zero charge (pH) and X-ray photoelectron spectroscopy, and tested for adsorption behaviors of Hg(II) ions. The experimental data of equilibrium isotherms fitted well with the Langmuir model.

Pretreatment of concentrated leachate by the combination of coagulation and catalytic ozonation with Ce/AC catalyst.

A raw concentrated leachate produced from membrane bioreactor-nanofiltration (MBR-NF) was taken from Chengdu Chang'an Waste Landfill Site, China. The major fraction of this concentrated leachate was large refractory humic substances. A coagulation-ozonation process was applied to treat this leachate, aiming at enhancing chemical oxygen demand (COD) removal efficiency and increasing its biodegradability.