ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yujian Rao,Zhenliang Li,Tuo Zhang,Zhehan Wang,Weisheng Li,Xinran Wang,Litao Sun,Yuan Ren,Li Tao
Endowing transition metal dichalcogenides (TMDs) with mesoporous structure can greatly enhance their porosity, accessible specific surface area, and exposed active sites, leading to better performances in applications based on interfacial reactions. Current methods including hard-template (nanocasting) method or thermal-assisted conversion (TAC) still suffer from drawbacks such as cumbersome and environmentally unfriendly process, humidity sensitivity, or ill-defined mesostructures. Herein, the study reports a facile synthesis of ordered mesoporous TMDs/carbon composites by direct organic–inorganic co-assembly in dual solvent (DMF/H 2 O). The amphiphilic block copolymer polyethylene oxide- b -polystyrene (PEO- b -PS) is used as the organic template, and (NH 4 ) 2 MoS 4 or (NH 4 ) 2 WS 4 as the inorganic precursor. After solvent evaporation-induced aggregation assembly and thermal treatments, it results in highly ordered mesoporous MoS 2 , WS 2 , and MoS 2 /WS 2 with highly crystalline framework, high specific surface area (44-91 m 2 g −1 ) and large pore sizes (15–21 nm). Semiconductor gas sensors based on mesoporous TMDs exhibit extraordinary sensing performances toward NO 2 at room temperature, including high sensitivity and ultrahigh selectivity, benefiting from its abundant adsorption sites for gas molecules, fast diffusion rate in well-connected mesopores, and rich edge active sites. This work paves a facile way to develop novel ordered mesoporous TMDs-based semiconductor materials for various applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Tao Ding,Mengxiang Zhu,Linghui Yan,Zhengyang Liu,Pin Zhou,Guosheng Shi,Dongting Yue
The unreasonable disposition of tungsten waste not only causes serious environmental contamination, but also leads to the metals resource wastage. A sustainable approach was proposed to obtain the Fenton-like catalyst derived from tungsten waste, which exhibits high efficiency for peroxymonosulfate (PMS) activation. The recovered WC@Co, as a Fenton-like catalyst, was fabricated via thermal treatment of machining wet tungsten sludge, which induces the phase separation of Co and increases Co loading on WC. The formed Co 0 as the electron-donor can not only facilitate the electron transform to W 6+ , but also active PMS for reactive species, thereby contributing to the enhanced generation of SO 4 – , OH, O 2 − and 1 O 2 . Moreover, the high-valent Co(IV) was also generated in WC@Co/PMS system. These radical and nonradical pathways for reactive species make WC@Co/PMS system high oxidation capacity and stability for persistent organic pollutants degradation. Thus our proposed strategy has successfully realized recycling of metals such as W and Co for environmental remediation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Dan Sun,Qilong Chen,Yi He,Yang Bai,Changhua Li,Rui Gou,Chuanfang Zhang,Xinbo Xu,Haichao Zhang
The main aim of this study was to exploit the advantages of dopamine and tetraaniline (TA) to enhance the physical barrier properties and active anti-corrosion performance of composite coatings ; in this study, the growth of polydopamine on the surface of Co-MOF enhanced its compatibility with waterborne epoxy, and Co-MOF-PDA-TA (MP-TA) was successfully synthesised by adding dopamine and tetraaniline via Michael addition , confirmed through characterisation methods such as Fourier-transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. MP-TA can be added as a nanofiller additive to water-based epoxy coatings, and a detailed study on the corrosion resistance of the prepared composite coatings showed that the composite coating containing 0.50wt% MP-TA/WEC exhibits good anti-corrosion performance with an impedance modulus at low frequency (0.01 Hz) of 7.253 × 10 9 Ω cm 2 because TA not only prolongs the time required for corrosion ions to reach the interface but also forms a passivation film on the steel surface. Moreover, the reduced TA can be oxidised to EB or even LEB by releasing two electrons, which further promotes the formation of a passivation film, providing a good pathway for the application of MP-TA as a multifunctional additive.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaohan Sun,Xianghao Meng,Qiaoxia Li,YuLin Min,Qunjie Xu
Introducing the second metal is an effective strategy to ameliorate oxygen reduction reaction (ORR) performance of cobalt and nitrogen doped carbon materials (Co-NC). In this study, Sn modulated Co-NC catalysts with enriched active sites (CoSn-NC) were synthesized by using formamide as ligand. Co and Sn bimetals coexist on nitrogen-doped carbon carriers and coordinated with nitrogen to form M − N active centers. Compared with Co-NC, CoSn -NC exhibited outstanding catalytic activity in terms of early initial potential of 1.04 V and positive half-wave potential of 0.89 V. Electrochemical testing and XPS characterization proved that the addition of Sn enriched the active site of Co-NC. More importantly, the electronic structure of Co–N is adjusted to perfect adsorption energy of the intermediate. The study puts forward a new idea and direction for optimizing single metal Co-NC catalyst.
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Applied Materials Today
·
2025
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IF 6.9
Yunpeng Ju,Wenhao Huang,Zhen Gao,Mingquan Liu,Naibao Huang
Effective bifunctional electrocatalysts for Oxygen reduction reaction and Oxygen evolution reaction (ORR and OER) are key for fuel cells and water electrolysis. Co-based dodecahedral bifunctional catalysts, rich in Co-N, pyridinic nitrogen, and metallic cobalt nanoparticles, were synthesized by pyrolysis of ZIF-67. The obtained ZIF-67–6 catalyst showed an onset potential of 0.90 V, a half-wave potential of 0.83 V (vs. RHE), a limiting diffusion current density of 5.24 mA cm⁻² for ORR, and an overpotential of 1.50 V (vs. RHE) at 10 mA cm⁻² for OER. These values are comparable to those of commercial 20 % Pt/C (0.89 V onset potential, 0.83 V half-wave potential, and 4.27 mA cm⁻² limiting diffusion current density) and IrO₂ (1.53 V overpotential at 10 mA cm⁻²). The catalyst maintained 92.11 % of its current density after polarizing at 0.80 V for 10,000 s. ZIF-67–6′s high performance and stability are attributed to the porous structure from MOF pyrolysis, the deposited cobalt nanoparticle, and the higher Co-N and the pyridinic nitrogen content. This work offers a practical method to produce nitrogen- and cobalt-rich bifunctional electrocatalysts with dodecahedral structures.
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MICROCHIMICA ACTA
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2024
·Vol. 191
·期 5
·1-12
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IF 5.3
Wei Zhanxiang,Qin Cong,Yang Xuhui,Zhu Linghao,Zhao Xiaoyan,Cao Jianliang,Wang Yan
Abstract The detection of hazardous CO gas is an important research content in the domain of the Internet of Things (IoT). Herein, we introduced a facile metal-organic frameworks (MOFs)-templated strategy to synthesize Cd-doped Co 3 O 4 nanosheets (Cd-Co 3 O 4 NSs) aimed at boosting the CO-sensing performance. The synthesized Cd-Co 3 O 4 NSs feature a multihole nanomeshes structure and a large specific surface area (106.579 m 2 ·g -1 ), which endows the sensing materials with favorable gas diffusion and interaction ability. Furthermore, compared with unadulterated Co 3 O 4 , the 2 mol % Cd-doped Co 3 O 4 (2% Cd-Co 3 O 4 ) sensor exhibits enhanced sensitivity (244%) to 100 ppm CO at 200 °C and a comparatively low experimental limit of detection (0.5 ppm/experimental value). The 2% Cd-Co 3 O 4 NSs show good selectivity, reproducibility, and long-term stability. The improved CO sensitivity signal is probably owing to the stable nanomeshes construction, high surface area, and rich oxygen vacancies caused by cadmium doping. This study presents a facile avenue to promote the sensing performance of p-type metal oxide semiconductors by enhancing the surface activity of Co 3 O 4 combined with morphology control and component regulation. Graphical Abstract
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POLYMER
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2024
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IF 4.1
Shengqiang Wang,Zhenbo Peng,Yanhua Huang,Mingquan Zhu,Yayun Liu,Yong Zhang
Phenyl-containing polysiloxanes have better thermal stability, low-temperature flexibility, and room-temperature damping performance than polydimethylsiloxanes. Poly [dimethylsiloxane- co -methyl (phenyl)siloxane] and poly (dimethylsiloxane- co -diphenylsiloxane) were synthesized through a bulk copolymerization of octamethylcyclotetrasiloxane and methylphenylcyclosiloxane mixture or octaphenylcyclotetrasiloxane, and the structure and properties of the copolysiloxanes were comparatively studied. The phenyl content in poly [dimethylsiloxane- co -methyl (phenyl)siloxane] can be as high as 50 mol%. With the increment of the phenyl content, the thermal stability of the copolysiloxanes is dramatically improved as evaluated by thermal gravimetric analysis. At a given phenyl content, poly [dimethylsiloxane- co -methyl (phenyl)siloxane] has higher thermal stability than poly (dimethylsiloxane- co -diphenylsiloxane). The former is more difficult to crystalline at low temperatures and has lower room temperature viscosity than the latter as confirmed by differential scanning calorimetry and rotational rheometer. The copolysiloxanes is mixed with hydrogen-containing polysiloxane and silica, and vulcanized at elevated temperature to get copolysiloxane composites with good damping properties, oil resistance, and low-temperature resistance. This study not only enriches the fundamental academic research on functional polysiloxanes, but also provides useful technical references for practical applications of phenyl silicone rubber.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Archer Bright,Wuyi Zhang,Kaisong Xiang,Hao Chen,Hui Liu,Jun Wu
CuO-CeO 2 composite catalyst for low temperature CO oxidation was fabricated via an impregnation method. The prepared composite CuO-CeO 2 achieved 50 % and 100 % conversion at approximately ∼ 70℃ and ∼ 110℃ (denoted as T 50 and T 100 ), respectively. The enhanced catalytic activities were attributed to the formation of abundant CuO/CeO 2 heterostructures, which increased the concentration of oxygen vacancies in their lattices. In addition, the pore structure of the CuO-CeO 2 composite has also been optimized during the impregnation synthesis process. Compared with bare CeO 2 , which only possesses micropores, CuO-CeO 2 forms more mesopores on its surface, which assists in reducing the deposition rate of sulfate species on the surface. The SO 2 tolerance of the catalyst and hence its stability towards practical industrial flue gas treatment is significantly promoted. Furthermore, Density Functional Theory (DFT) was also performed to explore the mechanism of CO oxidation on the CuO-CeO 2 . It was found that the oxygen vacancy can be easily formed on the CuO/CeO 2 heterointerfaces; the adsorption energy (ΔG) of CO was therefore decreased to 0.15 eV, much lower than that of bare CeO 2 (0.53 eV). Besides, the center of f electrons of Ce in CeO 2 rises from −0.55 eV to – 1.71 eV by introducing CuO, suggesting that the f electrons in Ce become more active, which is beneficial for CO to adsorb.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2025
·
IF 2.9
Zhenyi Chen,Shuo Li,Kun Feng,Zhen Wen,Jun Zhong
Low-level radioactive wastewater containing Co(II)–EDTA generated in the nuclear industry is harmful to the environment, but it is difficult to remove owing to the high stability of metal–organic complexes. Here, we report efficient contact-electro-catalysis (CEC) to achieve the decomplexation of Co(II)–EDTA by using commercial fluorinated ethylene propylene (FEP) powder as a dielectric catalyst. The reaction generated reactive oxygen species through solid–liquid interfacial charge transfer, disrupting the chemical bonds and then oxidizing the central atoms in Co(II)–EDTA to form Co(III)–EDTA with vacancies. The Co(III)–EDTA could be easily removed from the solution under alkaline conditions. The decomplexation efficiency reached a high value of 41.6%, with a constant reaction rate of 0.024 min−1 in 240 minutes. The FEP also exhibited excellent recyclability over 40 h without obvious changes. Unlike conventional advanced oxidation processes, this approach does not require the use of electrodes or chemical oxidants, leading to low energy consumption. This approach also holds great potential for green wastewater management via integration with ambient mechanical energy sources (e.g., wind and hydrostatic pressure).
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Applied Materials Today
·
2025
·
IF 6.9
Weiqiang Fan,Yongzhen Wang,Rulin Liu,Jing Zou,Weiyi Cai,Jing Cheng,Xiang Yu,Li Xu,Jiaxin Li
The high-value reuse of textile waste is essential for the sustainability of the textile industry; however, it remains a significant challenge, particularly regarding smart materials, despite numerous reports on textile waste recycling methods. 4D printing, as an advanced technological tool, can incorporate smart attributes to enhance the competitiveness of textile waste market. Here, we present a novel strategy of biomimetic 4D reconstruction of textile waste, in which 4D-printed heat-humidity co-responsive fabrics integrate a humidity-responsive substrate derived from textile wastes and heat-responsive components. The humidity-responsive materials consist of regenerated polyurethane substrate from spandex tarpaulin waste and regenerated cellulose fillers from cotton-knitted fabric waste. The heat-responsive component is based on polycaprolactone photo-crosslinked with benzophenone and triallyl isocyanurate. The printed structures can be programmed for preset actuation, and the 4D-printed heat-humidity co-responsive fabrics can be activated in wet, hot, or wet-hot environments, conducive to maintaining heat-humidity comfort of the human body. Our research offers innovative solutions for repurposing textile waste recyclable products, and the 4D smart fabrics would provide strong candidates in personal thermal-moisture management.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Li Zhang,Jun Cao,Pui Wo Felix Yeung,Hang Jiang,Jianzhong Jiang,Wei Liu,To Ngai
Poly( N -isopropylacrylamide)-based microgels are soft and deformable colloids, which can swell and shrink in response to external stimuli such as temperature or pH, making them suitable for various industries. Herein, poly(styrene- co - N -isopropylacrylamide) microgels with varying softness were synthesized through the doping of different proportions of styrene into their network structure. Rheological tests revealed that the deformability, surface charge, and wettability of microgels were precisely regulated through adjustments to styrene doping levels. As the molar ratio of styrene increased, the range of the linear viscoelastic region regarding stain did not exhibit a consistent change. The microgel suspensions exhibited a pronounced viscous-like behavior, as indicated by their frequency dependence. Additionally, the concentration or volume fraction of microgels significantly influenced the phase distribution in the phase diagram. At lower concentrations, the microgel suspensions typically underwent a colloidal gel-to-liquid-to-glass transition, with the liquid-like regime expanding as the styrene doping level increased. At higher microgel concentrations, the volume phase transition shifted to a direct colloidal gel-to-glass transition, particularly at high styrene levels. This study also revealed a strong correlation between the power-law viscoelastic exponents and the loss tangent during the entire phase transition, offering valuable insights for structure and rheological properties of poly( N -isopropylacrylamide)-based microgels.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Liangyuan Chen,Jiangfeng Liu,Jitao Shang,Jin-Xiu Liu,Zhaofu Zhang,Xiaolin Liu,Du Wang,Yan Zhao
The instability of Zn anodes arising from uncontrolled deposition remains a critical bottleneck for zinc-metal batteries. Here, a sustainable Zn/Cu co-deposition strategy is reported via a cost-effective ethanol-based hybrid electrolyte (EtZCL-Cu) containing ZnCl 2 and insoluble Cu(OH) 2 additives. The high Cl − concentration enables continuous Cu 2+ release via complexation-driven Cu(OH) 2 dissolution, facilitating spontaneous Zn/Cu displacement-alloying reactions during cycling. This dynamic reconstruction mechanism ensures long-term exposure of zincophilic Cu sites on the electrodeposited Zn surface, thereby effectively preventing the defunctionalization of zincophilic alloy interfaces. The reconfigurable alloy interface maintains zero nucleation overpotential and enables dendrite-inhibited Zn electrodeposition, achieving exceptional cycling stability (>6000 h) in Zn symmetric cells. The ethanol solvent and Cl − complexed Cu + /Cu 2+ redox couple cooperatively increase the capacity of the activated carbon cathode full cells, delivering >90 mAh g −1 over 10,000 cycles at 0.5 A g −1 , with 95.9% capacity retention. This work establishes a sustainable interfacial engineering paradigm through electrolyte-mediated in situ alloying, effectively addressing the critical challenge of zincophilic interface defunctionalization in Zn-metal battery systems.
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