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Three-dimensional carbon-based porous materials have proven to be quite useful for tailoring material properties in the energy conservation and environmental protection applications. In view of the three-dimensional and well-defined structure of metal-organic frameworks (MOFs), a novel carbon-based magnetic porous material (HKUST-Fe3O4) has been designed and constructed by MOF-guest interactions of high-temperature pyrolysis. The obtained HKUST-Fe3O4 exhibited the unique features of superparamagnetism, a macro/mesoporous structure, environmental protection (inexistence of toxic heavy metal ions), and physicochemical stability and has shown high adsorption capacity and rapid adsorption for carcinogenic organic pollutants (for example, rhodamine B) with an environmentally friendly character and excellent reusability. We demonstrate that the unique/superior advantages of HKUST-Fe3O4 could meet the requirements of environment cleaning, especially for removing the targeted organic pollutant from water. Moreover, the specific HKUST-Fe3O4 and organic pollutant interaction mechanism has been analyzed in detail via parameter-free calculations. This study proposes a promising strategy for constructing novel carbon-based magnetic nanomaterials for various applications, not limitated to pollutant removal.

Three-dimensional porous carbon-based materials from metal–organic frameworks (MOFs) have been proven useful in structural mechanical and catalytic applications due to the high specific surface area and excellent electron transport property. However, introducing and loading of metal catalytic sites on MOF-derived porous carbon-based materials always involves complex multistep synthetic processes and unwarrantable catalyst sites with high catalytic activity. Here, we have developed a facile Mo-doping-assisted strategy to construct a highly active nanorod with Ni-based catalyst nanoparticles from a MOF (MCF-61). Thanks to the assistance of Mo-doping to restrain the migration and aggregation of elemental Ni, the obtained Mo-doped Ni-based catalyst (MNC) exhibited excellent catalytic activity in the solution-phase hydrogenation of nitrophenols compared to those reported in other studies. Moreover, the role of molecular structures of nitrophenols on their reduction in MNC has been revealed by quantum chemical ...

In this study, the mechanism behind the effect of hydrostatic pressure on phosphorus solubilization from sediment to water was studied in culture experiments using reactors pressurized at 0.1, 0.2, 0.5, and 1.0 MPa. In the sterilized group, the phosphorus content in the sediment was not affected by the hydrostatic pressure. In the unsterilized group, the phosphorus release values were 162, 198, 253, and 289 mg kg−1 at 0.1, 0.2, 0.5, and 1.0 MPa, respectively. In addition, when the hydrostatic pressure was increased from 0.1 to 1 MPa, the activity of alkaline phosphatase increased from 210 to 357 mg kg−1 h−1. The abundance of inorganic phosphorus-solubilizing bacteria increased with rising hydrostatic pressure, but the abundance of organic phosphorus-solubilizing bacteria was highest when the hydrostatic pressure was 0.5 MPa. Pearson regression analysis indicated that the maximum organic phosphorus-solubilizing capacity was positively correlated with the alkaline phosphatase activity (R = 0.97, p

Through-mask electrochemical etching (TMEE) is one of the main methods to fabricate metal microstructures array in large scale. In deep metal microstructure etching process, lateral corrosion problem seriously affects the etching localization. In this paper, megasonic and particle combined through mask electrochemical etching (MP-TMEE) method was proposed to improve the etching localization in TMEE process. Experimental results show that the etching factor (EF) was greatly improved by MP-TMEE method compared to traditional TMEE. With the use of MP-TMEE, when the feature size of the mask was 100 μm, the average diameter and depth of the etched micro pits were 148.7 μm and 59.9 μm. The use of MP-TMEE instead of TMEE leads to an increase in EF from 1.58 to 2.50. Besides, the mechanism of the synergistic effect of megasonic and the particles in MP-TMEE process was investigated. An erosion theoretical model of passivation film was established and verified by electrochemical impedance spectroscopy (EIS) method. The measurement results of EIS show that the micro pit depth and the passivation film resistance have the opposite variation trend, and the passivation film resistance measurement results are consistent with the trend of the theoretical model. Finally, microstructure arrays involving stainless steel micro pit array and micro pillar array, copper micro pit array and micro pillar array were fabricated using MP-TMEE method.