Developing low-cost, efficient, and stable trifunctional electrocatalyst for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) is still a significant challenge. Herein, this study reports a zeolitic imidazolate framework (ZIF) derived trifunctional electrocatalyst, composed of Co 5.47 N and Co 7 Fe 3 (CoFeN) that embedded into 1D N-doped carbon nanotubes modified 3D cruciform carbon matrix (NCNTs//CCM). Benefiting from the robust interfacial conjugation of Co 5.47 N/Co 7 Fe 3 and the 1D/3D hierarchical structure with a large surface area, the as-prepared CoFeN-NCNTs//CCM display trifunctional electrocatalytic activity for ORR (half-wave potential of 0.84 V), OER (320 mV at 10 mA cm -2 ), and HER (−151 mV at 10 mA cm -2 ). The assembled Zn-air battery exhibits high power density (145 mW cm -2 ) , enhanced charge-discharge performance (voltage gap of 0.76 V at 10 mA cm -2 ), and long-term cycling stability (over 445 h). The resultant overall water-splitting cell achieves a current density of 10 mA cm -2 at 1.63 V, which can compete with the best reported trifunctional catalysts. What is more, the self-assembled Zn-air batteries are utilized to power the overall water splitting successfully, verifying great potential of the CoFeN-NCNTs//CCM as functional material for sustainable energy storage and conversion system.

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BACKGROUND Selective absorption of oils by macroporous solid absorbents has been regarded as an easy, environment‐friendly and economical way to gather oils for oil–water separation, oil contamination cleanup and easy transport/storage. Cheap absorbent material with high oil‐absorption performance is a key factor to promote its large‐scale application. RESULTS Highly oil‐absorptive and water‐repellent carbonized asphalt‐melamine sponges (AMS) have been prepared via a dip‐coated sponge carbonization process, using deoiled asphalt (DOA) as dip‐coating reagent and melamine sponge (MS) as template. By the combination of DOA‐derived surface modification and mild carbonization at 600°C, the AMS products obtained such key properties as low density, highly selective absorption of oils against water, flexibility, good fire‐resistance and thermal stability, and good recyclability. CONCLUSION These findings indicate that AMS can be a promising oil‐absorbent material applicable to oil pollution control on a water surface. Benefiting from both cheap raw materials and facile economical manufacturing process, the approach proposed can contribute to the mass manufacturing of cheap oil‐absorbent products with high oil‐absorption performance. © 2016 Society of Chemical Industry

a b s t r a c tThis work discussed the preparation and characterization of graphene oxide (GO) modified polyvinyl alcohol (PVA) for bacteria immobilization to enhance the biodegrdation efficiency of saline organic wastewater. GO-PVA material has lamellar structure with higher surface area to support bacterial growth and high salinity tolerance. It significantly stimulated the bacterial population by 1.4 times from 2.07 Â 10 3 CFU/mL to 5.04 Â 10 3 CFU/mL, and the microbial structure was also improved for salinity tolerance. Acinetobacter, Pseudomonas and Thermophilic hydrogen bacilli were enriched inside GO-PVA materials for glucose biodegradation. Compared to the COD Cr removal efficiency with only PVA as the carrier (52.8%), GO-PVA material had better degradation performance (62.8%). It is proved as a good candidate for bioaugmentation to improve biodegradation efficiency in hypersaline organic wastewater.

Herein we described a new electrochemical strategy for the detection of hydrogen peroxide employing Fe 3 O 4 magnetic nanoparticles and polyamidoamine dendrimer (PAMAM). Both of them were modified on the surface of gold electrode as the work electrode. The detection of H 2 O 2 was studied by the method of Amperometric i-t Curve. Under the optimized experimental conditions, H 2 O 2 could be detected in a linear calibration range of 2.0 9 10 -5 -1.0 9 10 -3 M with a correlation coefficient of 0.9950 (n = 10), the detection limit was 2.0 9 10 -6 M (3r) and the recovery ratio was 96.9-108.1 %, which indicated that the accuracy of this method is excellent. The modified electrodes display excellent electrochemical performance, high sensitivity, good reproducibility, and long-term stability.

This study developed Fe3O4@cellulose nanocomposites by coprecipitation synthesis for bacteria capture and isolation. By surface modification with cellulose, the Fe3O4@cellulose nanocomposites have 20 nm average particle size and 3.3-24.9 emu/g saturation magnetization.Living bacteria could be captured by the Fe3O4@cellulose nanocomposites and harvested by magnetic field, with high efficiency (95.1%) and stability (>99.99%). By metabolizing cellulose and destroying the Fe3O4@cellulose@bacteria complex, cellulose-decomposing microorganisms lost the magnetism. They were therefore able to be isolated from the inert microbial community and the separation efficiency achieved over 99.2%. This research opened a door to cultivate the uncultivable cellulose-decomposing microorganisms in situ and further characterize their ecological functions in natural environment.Magnetic nanoparticles (MNPs) have been widely applied in biomedical and biological research.Surface modified MNPs are recently used to investigate the microbial behavior and functions in a complex microbiota, but the modification method is not well established for wider range of functional bacteria. This study developed a new surface modification method and synthesized the Fe 3 O 4 @cellulose nanocomposites.The bacterial capture efficiency was above 95.1% and the stability is above 99.99%. More importantly, the Fe 3 O 4 @cellulose nanocomposites successfully isolate the cellulose-decomposing Aeromonasveronii from an artificial microbial community.This work broadens the applicable potential of MNPs in assessing more unknown cellulose-decomposing bacteria in natural environment and their metabolic pathways. Novelty statement Fe3O4@cellulose nanocomposites can be used for the first time to isolate cellulosedecomposing bacteria from complex microbial community.  Fe3O4@cellulose achieves high bacteria capture efficiency (>95.1%) and stability (>99.99%).  Fe3O4@cellulose successfully isolates cellulose-decomposing Aeromonasveroniiand the separation efficiency is 99.2%.Thanks for the reviewers' comments and editors's suggestion. We have corrected the manuscript by adding Figure S1, 2 and 3 into the main manuscript and correcting the Figure number and caption.Response to Reviewers Magnetic field isolation Raw magnetic nanoparticles (MNPs) Fe 3 O 4 @cellulose nanocomposites Acinetobacter baylyi (no cellulose-decomposing capacity) Aeromonas veronii (cellulose-decomposing bacterium) MNPs synthesis Cellulose functionalization Fe 3 O 4 @cellulose nanocomposites Bacteria functionalization Cultivation and cellulose decomposing Graphical Abstract Highlight 1. Fe 3 O 4 @cellulose nanocomposites for cellulose-decomposing bacteria isolation. 2. Bacteria capture efficiency >95.1% and stability >99.99%. 3. Cellulose-decomposing bacteria separation efficiency over 99.2%. 4. Fe 3 O 4 @cellulosecan identify unknown cellulose-decomposingmicrobesin situ. AbstractThis study developed Fe 3 O 4 @cellulose nanocomposites by co-precipitation synthesis for bacteria capture and isolation. B...

Air splicing technology is the key technology to realize high speed, high quality and automatic winding in modern textile industry. However the current research of splicing mechanism is still in qualitative analysis, theoretical and experimental exploration stage. By modern computational mechanics method, with the air flow analysis results in different structures and shapes of splicer chamber, the air flow patterns under high pressure are determined; and the optimized structural characteristics of the splicing chamber are obtained in this paper. The results provide theoretical support on the innovative splicer chamber design, promote the development of the new air splicing technology, create important practical value, and provide the feasible means and methods in the air splicer theory research and optimization design.