Sodium ion capacitors (SICs) have drawn enormous interest due to their cost efficiency, superb power/energy densities, and long-span service life. Nevertheless, the imbalance of two involved electrodes in both kinetics and stability, mainly originating from battery-type anodes, restricts their practical application. Herein, we first propose a heterointerface engineering strategy to design a flexible self-supporting hybrid film anode, where metallic Mo 2 C quantum dots (QDs, ∼41.1 wt %) selfencapsulated in N-doped carbon nanofibers (N-CNFs) thanks to the interfacial interactions, toward advanced SICs. The synergistic effect of structural/compositional merits is highlighted with the induced interface coupling Mo−N−C toward enhanced electrochemical kinetics/stability and reinforced electrode structural integrity. The accelerating mechanism of electron migration at the heterogeneous interfaces is unveiled with density functional theory calculations. The obtained Mo 2 C QDs@N-CNFs film electrode is rendered with a competitive capacity of ∼160.9 mAh g −1 at 5.0 A g −1 , robust pseudocapacitive contribution, and long-duration cycling stability. Besides, the Mo 2 C QDs@N-CNFs-based SICs exhibit exceptional electrochemical properties. More significantly, the in-depth insights into the unique Na + -(de)intercalation mechanism of Mo 2 C QDs@N-CNFs are rationally proposed with in situ X-ray diffraction and electrochemical techniques. This promises the enormous potential of our designed carbon-matrix-confined Mo 2 C QDs nanohybrid for SICs and beyond.

A shocking Longjiang River cadmium pollution accident occurred in 2012, the effects of which on microbial communities remain unclear. Alkaline precipitation technology was applied for remediation, but concerns rose about the stability of this technology. To understand the geographic distribution of cadmium and its correlation with microbes, in this study, 39 water samples and 39 sludge samples from this river and 2 soil samples from the nearby farmland were collected for chemical and microbial analyses. The Cd concentrations of all water samples were lower than 0.005 mg/L and reached the quality standards for Chinese surface water. A ranking of sludge samples based on Cd contents showed sewage outfall > dosing sites > farmland, all of which were higher than the quality standard for soil. Alkaline precipitation technology was effective for Cd precipitation. Cd was unstable; it was constantly dissolving and being released from the sludge. The Cd content of each phase was mainly influenced by the total Cd content. Over 40,000 effective sequences were detected in each sample, and a total of 59,833 OTUs and 1,273 genera were found using Illumina MiSeq sequencing. Two phyla and 39 genera were notably positively correlated with the Cd distribution, while the cases of 10 phyla and 6 genera were the opposite.

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