Removal of diphenols using pine biochar. Kinetics, equilibrium, thermodynamics, and mechanism of uptake

Effect of ceria morphology on the performance of MnOx/CeO2 catalysts in catalytic combustion of N,N-dimethylformamide

The oxidation of 800 ppmv toluene in air has been investigated over CuMnOx ((Cu+Mn) loading: 10 wt%) dispersed on hydroxyapatite (Hap: Ca5(PO4)3(OH)) with different molar Cu/Mn compositions (2; 1; 0.5) to be compared with the corresponding supported single transition metal oxide catalysts. The solids have been prepared by wet aqueous co‐impregnation method followed by a calcination at 400 °C for 4 h and physicochemically characterized by different techniques. The catalytic performances of the supported Cu−Mn oxide catalysts revealed the existence of a synergetic effect in terms of activity and selectivity towards CO2 through the formation of Cu−Mn mixed oxides. The strongest synergetic effect is observed for a Cu/Mn molar ratio of 2 as confirmed by the standardized conversion rate values determined at 190 °C (r190) which followed the decreasing sequence (/10−2 h−1): Cu2MnHap (2.57)>CuMnHap (2.04)>CuMn2Hap (1.59)>MnHap (1.13)>CuHap (0.13). The highest activity of Cu2MnHap can be explained by a better reducibility of the active phase in line with a high density of Cu‐O−Mn interactions at the outermost layers as shown by ToF‐SIMS results.

Cu−Mn Hydroxyapatite Materials for Toluene Total Oxidation

Superior Fenton-like and photo-Fenton-like activity of MoS2@TiO2/N-doped carbon nanofibers with phase-regulated and vertically grown MoS2 nanosheets

In this research, polyvinyl chloride (PVC) with excellent shape-memory effects is 4D printed via fused deposition modeling (FDM) technology. An experimental procedure for successful 3D printing of lab-made filament from PVC granules is introduced. Macro- and microstructural features of 3D printed PVC are investigated by means of wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and dynamic mechanical thermal analysis (DMTA) techniques. A promising shape-memory feature of PVC is hypothesized from the presence of small close imperfect thermodynamically stable crystallites as physical crosslinks, which are further reinforced by mesomorphs and possibly molecular entanglement. A detailed analysis of shape fixity and shape recovery performance of 3D printed PVC is carried out considering three programming scenarios of cold (Tg −45 °C), warm (Tg −15 °C), and hot (Tg +15 °C) and two load holding times of 0 s, and 600 s under three-point bending and compression modes. Extensive insightful discussions are presented, and in conclusion, shape-memory effects are promising,ranging from 83.24% to 100%. Due to the absence of similar results in the specialized literature, this paper is likely to fill a gap in the state-of-the-art shape-memory materials library for 4D printing, and provide pertinent results that are instrumental in the 3D printing of shape-memory PVC-based structures. 

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/mame.202200677

4D Printing of Polyvinyl Chloride (PVC): A Detailed Analysis of Microstructure, Programming, and Shape Memory Performance

Photo-Fenton degradation of sulfamethazine using self-assembled CdS nanorods with in-situ production of H2O2 at wide pH range

Catalytic Combustion of Toluene over Cu–Mn Mixed Oxide Catalyst

Provided are a catalyst for room-temperature catalytic oxidation of formaldehyde pollutants and a preparation method and application thereof. Alumina monohydrate (AlOOH) is used as a carrier, precious metals Pt and Pd are supported on the AlOOH by adopting an impregnation method and the like, and the catalyst capable of conducting efficient catalytic oxidation on formaldehyde in the polluted air under normal pressure and room temperature into harmless carbon dioxide and water is obtained. The AlOOH carrier is prepared through direct calcination of aluminum hydroxide, and its preparation process is simple and repeatable, the surface area is larger, and lots of hydroxyl groups are produced. Nitrate is used as a precursor solution, the prepared Pt/AlOOH or Pd/AlOOH catalyst has higher dispersion degree of precious metals, and thus a more excellent room-temperature formaldehyde purification effect is obtained. Experimental tests show that the formaldehyde concentration is 80ppm in the air with the relative humidity RH of 0-80%, and the formaldehyde conversion rate of catalytic oxidation of the catalyst can be kept to 100% for a long time.

Catalyst for room-temperature catalytic oxidation of formaldehyde pollutants and preparation method and application thereof

The invention discloses a cerium tungsten titanium denitration catalyst and a preparation method thereof. A normal-pressure hydrothermal synthesis method is adopted. The preparation method comprises the following preparation steps: adding precursor solutions of cerium and tungsten sequentially into a titanium precursor solution which is aged and matured under the conditions of certain hydrothermalreaction temperature and pH value, aging and maturing under the conditions of certain hydrothermal reaction temperature and pH value sequentially, and dehydrating, drying, grinding and roasting the obtained turbid liquid to obtain the cerium tungsten titanium denitration catalyst. The cerium tungsten titanium denitration catalyst has high denitration activity under the condition of low temperature, and the conversion rate of nitric oxide at high air speed of 300000 mL/g/h and at 200 DEG C reaches 70 percent or more; the catalyst has wide temperature activity window, and the conversion rate ofnitric oxide at 250 to 500 DEG C reaches to 93 percent or more; and the catalyst has high sulfur resistance. The catalyst is suitable for denitration treatment of tail gas/flue gas of a movable source and a fixed source.

Cerium tungsten titanium denitration catalyst as well as preparation method and application thereof

Remarkably improved interfacial adhesion of UHMWPE fibers reinforced composite by constructing a three-dimensional stacked nanoparticles structure at interphase

Zhao Yang

Papers

Photo-Fenton degradation of sulfamethazine using self-assembled CdS nanorods with in-situ production of H2O2 at wide pH range

Catalytic Combustion of Toluene over Cu–Mn Mixed Oxide Catalyst

Catalyst for room-temperature catalytic oxidation of formaldehyde pollutants and preparation method and application thereof

Cerium tungsten titanium denitration catalyst as well as preparation method and application thereof

Remarkably improved interfacial adhesion of UHMWPE fibers reinforced composite by constructing a three-dimensional stacked nanoparticles structure at interphase