CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Weihu Zhang,Bin Chen,Yunyun Guo,Runzhang Tao,Chen Shu,Dandan Zhou,Lele Cui,Wenheng Jing
Engineering the hydrophobicity of electrode interfaces has been increasingly reported to enable favorable modulation of reactivity toward gas-consuming electroreduction reactions, yet effective strategies to maintain their durability under electrolysis and the fundamental mechanistic origins remain poorly understood. Herein, with the O 2 -to-H 2 O 2 conversion via two-electron oxygen reduction as a model, we demonstrate the critical role of O 2 feeding behavior in governing the stability of electrode hydrophobicity. In a typical submerged electrode system, several distinct O 2 feeding modes were created, including aeration-free, single-point aeration with low uniformity, and porous anode aeration with high uniformity. The unique coupling effect between O 2 feeding and feeding uniformity was then revealed experimentally and theoretically by combining long-term electrolysis, in situ monitoring, and COMSOL simulations. Specifically, the O 2 feeding operation allows for the stabilization of the global gas film of the hydrophobic electrode, while O 2 feeding in a uniform manner prevents the local gas film disappearance-induced chain loss of hydrophobicity. Based on this, the asymmetric structure (AS) cathode we designed achieved a long durability of 194 h in immersion operation, which is four orders of magnitude higher than the durability of the symmetric structure (SS) cathode. This study highlights the necessity of the interfacial consumption-replenishment equilibrium of gaseous reactants to stabilize electrode hydrophobicity, especially for the more promising gas diffusion electrodes.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 30
·e57224
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IF 2.8
Wenxi Liao,Chaofan Du,Luxin Li,Daiyi Wang,Yujian Wu,Jiansong Luo,Jiajia Deng,Yanyan Huang,Pan Wang,Yuxin Yang
Solar-powered interfacial evaporation technology is seen as a potential way to alleviate the crisis of water scarcity through seawater desalination. The key to the success of this technology hinges upon the efficient conversion of solar energy into heat energy, which is intimately connected with the innovative development of composite photothermal membranes. In this study, polyaniline (PANI) with excellent light absorption and carbon black (CB) with good stability were added to the polymer material polyaryl ether nitrile (PEN), and the PANI/CB-PEN nanofiber membrane was prepared by electrospinning blending. Due to the good stability of PEN polymer, the solar evaporator has excellent salt resistance and stability. The results show that the fiber membrane has the best light absorption effect when the reaction time is 80 min and the CB content is 50.0%. The composite fiber membrane temperature can reach 68.6°C, the evaporation rate is 1.51 kg m −2 h −1 , while the evaporation rate is 1.38 kg m −2 h −1 in a 3.5% NaCl brine. The photothermal conversion efficiency was 94.17%. The PANI/CB-PEN nanofiber membrane-based interfacial evaporation device demonstrates sustained performance in repeated tests, showing promising potential for long-term, scalable solar-powered seawater desalination applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Hanwen Zhang,Tianxu Wang,Chen Shen,Zhen Wang,Kewei Li,Xian Dang,Mengen Hu,Shuxin Li,Ming Li,Zhulin Huang,Xiaoye Hu
Various hollow structured HfB 2 powders were synthesized via a co-precipitation assisted boron/carbon thermal reduction method, and the influence mechanism of carbon source on morphology was systematically investigated. When glucose or inositol was employed as the carbon source, the hexagonal ring structure formed in the precursor during complexation directed the growth of HfB 2 nanoparticles that were anchored on hollow spherical carbon templates, resulting in a unique hollow core-shell architecture. Additionally, the morphology could be precisely adjusted from hollow spherical to hollow rod-like structures by simply controlling the stirring temperature during complexation. The growth process of HfB 2 with various morphologies was elucidated, and the mechanism of this unique morphological evolution was revealed to originate from the structural differences of precursor complexes. The HfB 2 powders with hollow spherical structure derived from glucose exhibits excellent electromagnetic absorption ability due to the synergistic effect of multiple scattering and interface polarization within the unique hollow structure, with a maximum reflection loss (RL) of −57.8 dB. Quantitative analysis of the loss mechanisms further demonstrates that the outstanding absorption performance is predominantly governed by polarization loss rather than conduction loss.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Wenjuan Cui,Zhengang Chen,Ruinan Xiong,Leyan Tang,Ling Zhu,Chenyang Cai,Xiaosong Zhou
Corrosion resistance is a critical challenge for magnesium alloys, particularly AZ31B, in aerospace, military, and biomedical applications. This study investigates the anti-corrosion performance of superhydrophobic SiO₂ NPs-modified PTFE/PUA hybrid coatings on AZ31B, fabricated using rod and spray painting techniques. The coatings exhibited excellent superhydrophobic properties, with contact angles exceeding 155° and a contact angle hysteresis (CAH) below 5° Electrochemical evaluations of superhydrophobic SiO₂ NPs-modified PTFE coatings demonstrated a reduction in i corr by four orders of magnitude compared to that of raw AZ31B Mg alloys, achieving a corrosion inhibition efficiency (η p ) of ∼ 99.9 % in a 3.5 wt % NaCl solution. The E corr shifted positively by 0.968 V and 1.022 V, respectively. Additionally, the R ct of the SiO₂ NPs-PTFE hybrid coatings increased by four orders of magnitude compared to blank PTFE-0-R coatings, indicating robust and enhanced corrosion resistance. The study also found minimal differences in corrosion protection based on fabrication technique, while SiO₂ NPs-PUA coatings showed limited effectiveness in corrosion resistance. These findings highlight the potential of superhydrophobic PTFE hybrid coatings in addressing corrosion challenges for magnesium alloys.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lu Guo,Chengbo Kou,Daliang Fang,Liping Yang,Guorui Deng,Lei Zhu,Wen Ji,Zhonglei Zhu,Haojie Li,Kuo Meng,Xinyue Ma,Binling Li,Meng Ding,Hui Ying Yang
Porous graphene-based electrodes possess great potential in membrane capacitive deionization (MCDI) applications due to their high conductivity and specific capacitance. To further enhance their desalination performance, a MCDI system utilizing nanostructured porous graphene doped with trace amounts of Co and N atoms (CoNG) as the cathode, and N-doped graphene (NG) as the anode is proposed. The porous structure and co-doping of N and Co imparts CoNG with numerous active reaction sites and enhances its electrochemical stability. Besides, the combination of CoNG and NG electrode lowers the overall adsorption energy of the MCDI system. Under optimal conditions, a high desalination performance of 69.23 mg g −1 and a desalination rate of 2.307 mg g −1 min −1 have been achieved with an energy consumption of 0.36 Wh g −1 . This study highlights the potential of graphene-based materials in desalination and lays a foundation for further improvements in their desalination performance.
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Journal of Sustainable Metallurgy
·
2025
·
IF 3.2
Li Zhongchen,Tian Qinghua,Wang Songsong,Wang Qinmeng,Guo Xueyi
The rapid development of the new energy industry has significantly increased the demand for nickel, a crucial metal in energy production. Consequently, laterite nickel ore has become an essential raw material for nickel smelting. The paper introduces a promising sulphidizing smelting technique to produce nickel matte from laterite nickel ore. Pyrite is a sulphidizing agent that selectively sulfurizes nickel and cobalt, enriching the nickel and cobalt in the ore into nickel matte. The study investigates the effect of flux on the liquidus temperature of slag. Additionally, it explores how variations in oxygen potential and the addition of sulfurizing agents affect the phases of nickel matte, the extraction ratios, and the grade of nickel and cobalt in the matte. The results indicate that the m (SiO2) /m (MgO) ratio significantly influences the liquidus temperature of slag. When the m (SiO2) /m (MgO) ratio is between 2.5 and 3.0, it is possible to achieve a smelting range with a liquidus temperature significantly below 1500 °C. Under specific conditions of a m (SiO2) /m (MgO) ratio of 2.5, calcium oxide addition of 10%, p O 2 = 10 –9.5 atm, 4% reducing agent carbon, and 6.5% sulfurizing agent, maintained at a constant temperature for 4 h, the extraction ratios of nickel and cobalt are 98.72% and 85.72%, respectively. The grades of nickel and cobalt are 21.35% and 0.96%, respectively. The phases present in the nickel matte include nickel–iron, nickel matte, and FeS, with a sulfur content of 22.92% in the nickel matte and a sulfur utilization ratio of 54.84%. Graphical
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ACS Nano
·
2025
·
IF 16
Zehong Zhao,Chengning Tang,Enming Cui,Ningning Sun,Jianing Zhou,Jianxing Lv,Lei Zhao,Yahua Liu,Shile Feng
Passive radiative cooling holds promise for achieving subambient cooling without consuming energy, facilitated by emitting thermal radiation into cosmic space. However, previous approaches, focusing heavily on aligning structural scales with optical properties, have struggled with effective anticondensation, thus limiting their applicability in high-humidity or supercooled conditions. Here, we demonstrate a design that enables efficient passive radiative cooling while maintaining robust anticondensation performance, underpinned by a triple-scale structure comprising microscale polymer particles, submicrometer-scale interparticle gaps, and nanoscale pores on the particle surfaces. This design achieves an efficient sunlight reflectance of 0.98 and high mid-infrared emissivity of 0.91 driven by the triple-scale structure-enhanced Mie scattering and chemical bond vibrations in polymer materials, respectively, enabling a 10.9 °C subambient cooling under direct sunlight at ∼40% relative humidity. Notably, even at a high relative humidity of ∼70%, our design still manifests an average cooling of ∼4 °C compared to ambient temperature, quite exceeding that of traditional radiative cooling materials. This is attributed to the robust anticondensation performance characterized by a maximum droplet shedding radius of ∼47.6 μm and a condensation droplet coverage of ∼32.4%, attributed to the triple-scale structure-induced larger Laplace pressure force and smaller adhesion. Moreover, our design demonstrates robust durability, encompassing self-cleaning performance via condensing droplets, thermal stability below 500 °C, and antiultraviolet radiation above 100 h, which exhibits potential applications in thermal management in various extreme scenarios.
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PubMed
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Haozhang Xu,Guoan Xi,Wei Chen,Yin Hu,Jun Xia,Weiguo Song,Changyan Cao,Yanhong Zeng,Dan Zhou
The development of hydrogenation catalysts with high performance and stability could decrease the byproducts and simplify the follow-up process in the industrial process. Optimizing supported catalysts through support improvement is a feasible approach to balance effectiveness and cost. In view of this, cubic perovskite NaNbO3 was modified with organosiloxane to form a heterophase junction support consisting of amorphous silica and NaNbO3 crystal. On the basis of this, the supported Ru catalyst displayed superior performance for α-pinene hydrogenation with almost complete conversion, cis-pinane selectivity, and good stability. The relationship between the structure and performance of the catalyst was systematically investigated by comprehensive experiments and multiple characterization technologies. Due to the formation of the heterophase junction, the surface hydrophobicity, specific surface area, and electron properties of the catalyst were optimized, leading to the good dispersity of the catalyst in the hydrogenation mixture and excellent adsorption and charge transfer ability, which should account for the unique performance of the catalyst, as confirmed by a series of experiments, characterizations, and DFT calculations. This work proposes an effective approach to optimize the surface structure and electronic properties of the catalysts through constructing crystallized and amorphous heterophase junction support, which is theoretically significant for the design and development of cost-effective heterogeneous hydrogenation catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiwei Guo,Yijie Li,Qian Zhang,Dongxu Wang,Lin Fang,Zhifen Wang,Xingfang Xiao,Yucang Zhang
Interfacial solar-driven evaporation technology offers a sustainable and efficient solution to the global water crisis by harnessing solar energy to extract clean water from contaminated sources. Herein, we present a novel biomass-based polyurethane (PU) foam platform, engineered with carbon-based materials and a porous structure, for highly efficient solar-thermal desalination. To enhance both hydrophilicity and antibacterial properties, liquefied chitin, a sustainable biopolymer derived from marine waste, was innovatively utilized as a natural foaming agent. By integrating a hydrophilic polyacrylamide (PAM) layer and optimizing the dispersion of photothermal carbon materials, the designed foams exhibit rapid solar energy absorption and unidirectional water transport. This synergistic system achieves an exceptional water evaporation rate of 2.74 kg·m −2 h −1 and significantly reduces the water evaporation enthalpy by ~36.76 % (from 2248 J g −1 to 1548 J g −1 ). Remarkably, the desalinated water meets superior purity standards, with ion concentrations reduced to below 1 ppm, far exceeding the World Health Organization (WHO) guidelines for potable water. This innovative, eco-friendly strategy not only provides a scalable approach for seawater desalination but also holds great promise for advanced wastewater purification, offering a sustainable pathway to address global water scarcity.
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Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 14
·7264-7275
·
IF 5.1
Jingxuan Zhang,Zetian Yang,Hengwei Lin,Dirk Poelman,Henk Vrielinck,Jiaren Du
Motivated by their variable chromatic transformations and remarkable thermal stability, photochromic materials derived from sodalite (Na8(AlSiO4)6Cl2) have been proposed for various applications such as optical anti-counterfeiting and radiation dosimetry. Nonetheless, the utilization of these optical materials is significantly constrained by the intricate synthesis process and weak photochromic contrast. Herein, a one-step microwave-assisted solid-state method is adopted to prepare sodalites and optimize their photochromic performance. The results show that the sample can be synthesized through only 16-minute microwave radiation, greatly simplifying the preparation process. Notably, the maximum photochromic contrast of sodalites is enhanced from 13.8% to 26.9% through the partial substitution of Cl with S ions. In addition, optical spectroscopy and electron spin resonance experiments are performed to investigate the influence of traps on the photochromic behavior. It was found that the photochromic behavior in sodalites is mainly determined by traps with an energy depth around 0.788 eV. The activation energy of these traps is determined by the host and the corresponding preparation approach. Finally, sodalite-based compounds are fabricated into fibers for clothing decoration demonstration. This work not only provides a facile method for the synthesis of sodalite-based photochromic materials but also gives insight into the trap-involved photochromic mechanism.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Mo Yan,Liang Ma,Shihao Wu,Zengyan Wei,Dechang Jia,Yu Zhou,Xiaoming Duan
Developing efficient electrocatalysts for the oxygen evolution reaction (OER) is crucial for sustainable hydrogen production via water electrolysis. Herein, we report the facile synthesis of single- or few-layer Ti 3 C 2 T x MXene and LaCoO 3 /Ti 3 C 2 T x composite catalysts by a ball milling-assisted exfoliation strategy with urea intercalation. Tafel slope plot was used to obtain the intrinsic Tafel slope of OER for LaCoO 3 /Ti 3 C 2 T x composite with varying mass ratios. By optimizing the composite ratio, the intrinsic Tafel slope of OER is decreased from 88.6 to 47.1 mV/dec, indicating a shift of rate-determining step (RDS). This enhancement stems from interfacial electronic modulation rather than conductivity and hydrophilicity provided by Ti 3 C 2 T x alone. Charge transfer between LaCoO 3 and Ti 3 C 2 T x elevated the Co valence state in LaCoO 3 and induced lattice strain, which modulated its electronic structure and shifted the RDS of OER to O–O bond formation. This study highlights the interface engineering in composite catalysts for efficient energy conversion.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Huiyu Yang,Xiaohua Cheng,Bin Lu,Yahui Zhou,Xin Liu,Shuai Peng,Bo Deng
Highly reflective substrate surfaces produce strong reflections of interfering and scattered light, which reduces the saturation and brightness of structural colors constructed by photonic crystals. Amorphous SiO 2 photonic crystals of 250–360 nm were synthesized using the Stober method, and then synergized with strongly light-absorbing carbon nanoparticles to construct a variety of structural colors on the surface of white cotton fabrics by electrostatic self-assembly. The vividness and stability of the structural colors on the surface of black cotton fabrics were also compared. The results showed that the structural color cotton fabrics had excellent washing fastness and abrasion fastness. The microscopic morphology of SiO 2 microspheres and structured color surfaces were investigated by Scanning electron microscopy (SEM). The compositional structure of SiO 2 microspheres was analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The color quality of structured color cotton fabrics was investigated using reflectance spectra and K/S values.
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