CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jiuyu Chen,Zhiwen Liu,Zenghui Liu,Hao Wu,Chensheng Gao,Jiaqi Shi,Dingming Xue
Radioactive iodine ( 131 I and 129 I) produced by the development of nuclear energy poses a long-term threat to ecology and health. In this study, a series of Cu@Mn x Cu 10-x -C materials were synthesized using Mn x Cu 10-x -BTC as the precursor, followed by surface grinding with external copper salts and subsequent pyrolysis. The material achieved a uniform dispersion of high-density Cu 0 sites on the Mn-Cu carbon framework. The optimal material Cu@Mn 3 Cu 7 -C had saturated adsorption capacities of 346.6 mg/g and 1555.3 mg/g for iodide (I − ) and iodine (I 2 ) respectively, further improving under acidic and oxygen-rich conditions. In addition, it could maintain excellent I − adsorption performance in the presence of highly competitive anions, in actual water samples, and after high-dose γ-irradiation. Mechanism studies demonstrated that Cu 0 , as the reaction center, dominated the oxidation-adsorption of I − and the reduction and fixation of I 2 , while triiodide (I 3 − ) could be effectively eliminated through the [Cu → I 3 ] charge transfer complexation or disproportionation pathway. The Mn species cooperated with the Cu site through valence modulation and electron transfer. This study provides a material system and theoretical basis for the efficient removal of multiple iodine species in complex water bodies with high capacity, fast kinetics and good environmental adaptability.
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CERAMICS INTERNATIONAL
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2026
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IF 6
Yang Ma,Huimin Zhang,Juntao Xie,Dingran Li,Yufei Liu,Aimin Chang
A novel perovskite-type low-temperature thermistor ceramic, LaMn 1-x Cu x O 3 (0 ≤ x ≤ 0.5), was synthesized utilizing the sol-gel technique. X-ray diffraction (XRD) analysis verified the successful formation of a single-phase perovskite structure throughout the entire compositional range. Scanning electron microscopy (SEM) observations indicated that an increase in Cu 2+ doping concentration resulted in grain growth and a morphological evolution from square-shaped to polygonal grains. For all samples, the resistivities (ρ 65K ), activation energies for electrical conduction (E a ) and thermal constants (B 65/150 ) were in the ranges of 0.380 to 6.247 MΩ cm, 0.066 to 0.128 eV and 835-1213 K. The electrical characterization of LaMn 1-x Cu x O 3 ceramics demonstrates conformity with the small polaron conduction model. Analysis through impedance spectroscopy reveals that the electrical resistivity of the material is primarily controlled by grain boundary resistance. This study emphasizes the enhancement of electrical properties and the modulation of the band structure achieved through Cu 2+ ion doping, thereby offering a viable approach for the advancement of high-performance LaMnO 3 -based negative temperature coefficient thermistors operating at low temperatures.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
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IF 9.6
Yi Zhou,Peike Cao,Shuo Chen,Hongtao Yu,Xie Quan
Selectively converting carbon dioxide (CO 2 ) to ethanol via photocatalysis offers a sustainable means of storing solar energy in chemical bonds. However, its efficiency is limited by an inadequate proton supply from water oxidation to drive the carbon‑carbon (C C) coupling step. This inefficiency leads to poor ethanol selectivity and promotes a competing hydrogen evolution side reaction, ultimately restricting overall system performance. Here, we designed a ternary In(OH) 3 -Cu 2 O/PCN heterojunction as a functionally partitioned catalyst: Polymeric carbon nitride (PCN) acts as the photoelectron donor, cuprous oxide (Cu 2 O) acts as the CO 2 reduction center, and trace indium hydroxide (In(OH) 3 ) is dedicated to water oxidation. Density Functional Theory (DFT) calculations reveal that water dissociation on In(OH) 3 generates active hydrogen species (*H), which are subsequently transferred to adjacent Cu sites with a low migration barrier. This interfacial proton relay mechanism avoids the accumulation of high-energy *H intermediates on the active sites, which suppresses the competing hydrogen evolution reaction. Correspondingly, the energy barrier for the crucial adsorbed carbon monoxide (*CO) dimerization step is lowered from 0.93 eV to 0.78 eV. The catalyst demonstrates superior activity to most documented photocatalysts for CO 2 -to-ethanol conversion, operating under sacrificial agent-free conditions, achieving an ethanol production rate of 125.4 ± 5.1 μmol g −1 h −1 and a selectivity of 90.4% ± 2.8%. These findings highlight the promise of functionally partitioned architectures in steering complex multi-step photocatalytic transformations toward valuable multi‑carbon products.
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高影响因子
WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 14
·791
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IF 3.5
Yu Lian,Lu Jiarui,Yu Meng,Duan Yajing,Zhang Baofeng,Zhang Xuan,Wang Xiaoyue,Liang Cunzhen
Cu(I) doped Fe 3 O 4 nanoparticles was loaded onto graphene oxide, Cu-Fe 3 O 4 /GO with binary active sites and accelerated Fe(III)/Fe(II) cycle showed higher tetracycline hydrochloride oxidation efficiency than Fe 3 O 4 and Cu-Fe 3 O 4 , the influences of initial H 2 O 2 concentration, reaction pH, catalyst dosage, reaction temperature and radical scavengers on catalytic performance of Cu-Fe 3 O 4 /GO were investigated. The heterogeneous Fenton reaction over Cu-Fe 3 O 4 /GO surface contained Fe(III)/Fe(II) and Cu(II)/Cu(I) active sites, Fe species were the dominant active centers. Cu-Fe 3 O 4 nanoparticles and GO combined via C–O–Fe bond and formed a stable Cu-Fe 3 O 4 /GO conductive structure, which promoted electrons transfer between Cu-Fe 3 O 4 and H 2 O 2 , thus accelerating Fe(III)/Fe(II) and Cu(II)/Cu(I) cycles. GO significantly improved specific surface area, Cu-Fe 3 O 4 nanoparticles dispersibility, and adsorption performance of catalyst. Furthermore, the strong interaction between GO and Cu-Fe 3 O 4 prevented ions from leach, GO captured the soluble Fe(III) which was efficiently reduced to Fe(II) surf by surrounding H 2 O 2 and Cu(I) surf . The degradation efficiency maintained 80.7% after six cycles, the excellent stability can be ascribed to the strong interaction between Cu-Fe 3 O 4 and GO. Reactive oxygen species scavenging results indicated that surface-bound • OH surf played a dominating role, followed by aqueous • OH aq and superoxide radicals (O 2 •− ).
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Congyang Zou,Yujie Wang,Jie Tian,Ruijie Liu,Minjie Yang
The Ag 2 CO 3 /Cu-BiVO 4 (ACCB) Z -scheme heterojunction photocatalyst was synthesized via a combined hydrothermal and deposition method to activate peroxydisulfate (PDS) for efficient degradation of norfloxacin (NOR). Compared with conventional photocatalysts, the as-prepared Z -scheme heterojunction effectively promotes the separation of photogenerated carriers via a Z-scheme charge transfer pathway. Systematic characterizations including XRD, SEM, and XPS verified the successful preparation of the ACCB Z -scheme heterojunction and the incorporation of Cu, both of which play key roles in enhancing PDS activation and NOR degradation. Photocatalytic degradation experiments demonstrated that ACCB-100 exhibited optimal performance among the ACCB catalyst series under visible light irradiation, achieving a NOR degradation efficiency of 95.68% within 120 min, which was significantly superior to those of the pristine single-component materials. Further cyclic degradation experiments showed that ACCB-100 still retained a degradation efficiency of 88.62% after five cycles, indicating its excellent photocatalytic stability. Simultaneously, radical trapping experiments and ESR analyses demonstrated that h + , ·O 2 − , ·OH and SO 4 ·- were the active species involved in the photocatalytic degradation of NOR.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xian-Ze Meng,Xin-Ran Li,Yang Li,Hong-Ji Wan,Hao-Jie Yan,Lian-Kui Wu,Fa-He Cao
The deployment of potassium ion (K+) sensors in demanding environments, such as marine resource utilization, energy storage systems, and industrial processes, is severely limited by the thermal instability of state-of-the-art sensing materials. Traditional ionophores like valinomycin and crown ethers irreversibly lose activity above 50 °C, rendering them unsuitable for applications involving significant temperature fluctuations. Herein, we report a breakthrough all-solid-state K+ sensor engineered to overcome this fundamental limitation. The sensor architecture integrates a Cu2O semiconductor as an ion-electron transduction layer and a potassium–copper hexacyanoferrate (CuHCF(K)) active layer, forming a robust Cu–Cu2O–CuHCF heterojunction. First-principles density functional theory (DFT) calculations guided the rational design, predicting superior K+ selectivity over Na+ based on adsorption energetics and d-band center analysis. A one-step electrochemical synthesis protocol was developed to fabricate this heterostructure with comprehensive characterization (EIS, XPS, XRD, SEM) confirming its successful formation and interfacial properties. The sensor demonstrates exceptional analytical performance, operating reliably within a wide temperature range of 25–100 °C and maintaining high selectivity for K+ in high-salinity seawater matrices. Furthermore, to bridge the gap between laboratory data and field deployment, we developed and open-sourced a Potential–Temperature–Concentration (PTC) machine learning model based on a back-propagation neural network. This work provides a new paradigm for designing robust electrochemical sensors for harsh environments, combining theoretical material design with intelligent data processing for practical industrial applications.
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FUEL
·
2026
·
IF 7.8
Luqi Hu,Luyang Qiao,Jinxiang Wang,Xiguang Wang,Yong Gao,Zhangfeng Zhou,Yuangen Yao
Gas-phase dehydrocyclization of 1,4-butanediol (BDO) is an environmentally benign and sustainable route for γ-butyrolactone (GBL) production. In this work, a series of Cu-M (M = Zn, Cr) catalysts was synthesized via coprecipitation and evaluated in a fixed-bed reactor for GBL yield. Under the reaction conditions of 240 °C, 0.1 MPa, and a weight hourly space velocity (WHSV) of 2 mL∙g −1 ∙h −1 , 99.62% of BDO conversion, 99.72% of GBL selectivity, and 2.22 mol GBL ·g catalyst -1 ·h −1 of CBL formation rate were achieved over CuZnCr-600 catalyst, which is higher than reported studies. Long-term test proved that this catalyst could operate over 100 h without any deactivation. Combined microscopic and spectroscopic analysis showed that the calcination conditions affected the surface acidity-basicity of catalysts by changing the CuO content and the strength of the Cr-O bond. The Cu-M compositions significantly influenced the morphology and the electronic properties of Cu species. The incorporation of Cr led to the formation of CuCr 2 O 4 spinel structure, which not only enhanced Cu dispersion but also improved the catalysts’ resistance to sintering. The presence of Zn restrained the phase-transformation of CuCr 2 O 4 from cubic to tetragonal, which ensured the reducible property of CuCr 2 O 4 even under high-temperature calcination. Furthermore, modulating the calcination temperature and the Cu-M compositions maintained an optimal Cu + /Cu 0 ratio under reaction conditions. All these issues contributed to the high yield of GBL and the prolonged lifetime of catalysts.
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SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.9
Xingtao Cheng,Kaijun Wei,Ziqiang Wu,Shilin Guo,Longbo Luo,Yi He
Inspired by biological surfaces such as lotus leaves and Stenocara beetles, superhydrophobic coatings have attracted considerable attention due to their exceptional water repellency, self-cleaning behavior, and corrosion resistance. In this work, Ni-Cu/HDTMS-MX superhydrophobic coatings were fabricated through the co-deposition of MXene with a Ni Cu coating, followed by surface modification using hexadecyltrimethoxysilane (HDTMS). The Ni-Cu/HDTMS-MX coatings exhibit excellent superhydrophobic performance, with a water contact angle (CA) of 155.1 ± 2.2° and a roll-off angle (RA) of 6 ± 0.5°, accompanied by effective water jet rebound, self-cleaning capability, and enhanced corrosion resistance. Electrochemical measurements demonstrate an order-of-magnitude reduction in corrosion rate (0.5 × 10 −3 mm·y −1 ) and corrosion current density (0.4 × 10 −7 A·cm −2 ), while the impedance modulus |Z| at 0.01 Hz for the Ni-Cu/HDTMS-MX coating reaches approximately 375% of that of the Ni Cu coating. The improved corrosion resistance is attributed to the labyrinth-like diffusion barrier introduced by MXene and the HDTMS-derived hydrophobic film, which significantly lowers the surface energy of the coating. Upon contact with aqueous media, the coating maintains a Cassie-Baxter wetting state, indicating stable superhydrophobic behavior. The entrapped air pockets within the hierarchical micro/nanostructure effectively block the penetration of corrosive species, thereby improving corrosion resistance in chloride-containing environments. This work provides a feasible strategy for designing durable superhydrophobic coatings for the long-term protection of carbon steel in harsh marine environments.
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POLYHEDRON
·
2026
·
IF 2.8
Haiyan Tao,Ye Zhang,Weixiong Dong,Jianyue Li,Huwei Lan,Na Xia
Organic dye pollutants is one of the serious pollutants in recent years，which is a major global challenge that threatens human health and sustainable societal development. Therefore, effective efficient removal of organic contaminants from water has thus become a vital issue. As an advanced oxidation process, the Fenton reaction has gained considerable attention owing to its effectiveness in degrading refractory organic pollutants. In this study, a simple sol-gel process was used to prepare carboxymethyl fiber copper‑iron complex (Fe/Cu-CMF) heterogeneous Fenton reaction catalyst by co-coordination with copper (II) and iron (III) using esterification-modified cottonseed meal fiber (CMF) as raw material. The results showed that the Fe/Cu-CMF membrane grafting was successful, and the carboxyl group was successfully introduced into the fiber surface structure by the esterification reaction. The preparation of a carboxylate fiber iron‑copper complex through coordination with Fe 3+ and Cu 2+ was carried out for the degradation of reactive red 195 dye, and its catalytic performance was evaluated. Under light irradiation, Fe/Cu-CMF significantly enhanced dye degradation, achieving a decolorization rate of 95.6% in 50 min. The catalyst exhibited optimal activity at pH 3.0 and maintained high efficiency over five consecutive reuse cycles, with the decolorization rate consistently at 95% without significant loss of activity. The research indicates that Fe/Cu-CMF materials are highly promising for use in technologies aimed at treating organic dye wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Meng Qiao,Yan-Fei Mu,Ji-Li Zhou,Su-Xian Yuan,Meng-Ran Zhang,Min Zhang,Tong-Bu Lu
Cu optimizes Co 3 O 4 d-orbital occupancy for symmetry-matched interactions with N 2 and CO 2 . • Cu-Co 3 O 4 reduces C − N coupling barrier from 2.34 to 1.19 eV. • Cu-Co 3 O 4 exhibits superior performance, ranking among the highest reported for photocatalytic urea synthesis. Photocatalytic CO 2 /N 2 co-reduction to urea is a green route for carbon‑nitrogen cycle closure, yet it is severely limited by the disparate orbital symmetry requirements of CO 2 /N 2 that impede synergistic activation on a single catalyst. Herein, Co 3 O 4 is doped with Fe/Cu/Ni to tailor the d -orbital configuration of its active sites, and Cu-Co 3 O 4 emerges as the optimal catalyst. It delivers a high urea yield of 25 μmol g −1 h −1 and a solar-to-urea conversion efficiency of nearly 0.035%, which ranks among the top efficiencies for photocatalytic urea synthesis. In situ diffuse reflectance infrared Fourier transform spectroscopy identifies *N 2 CO as the key reaction intermediate, while projected density of states calculations reveal that Cu 2+ ( d 9 ) optimizes d orbital occupation of catalyst to realize symmetry-matched adsorption of CO 2 /N 2 and strengthen orbital coupling. Density functional theory calculations further demonstrate that *N 2 CO formation is the rate-limiting step for urea synthesis, with Cu-Co 3 O 4 lowering the C − N coupling barrier to 1.19 eV (vs. 2.34 eV for pristine Co 3 O 4 ). This work establishes orbital symmetry matching between the d -orbitals of catalytically active sites and the π orbitals of reactants as a critical determinant for the selectivity of multi-molecule co-reduction reactions, thereby providing a general design principle for the development of high-performance photocatalysts. A Cu-doped Co 3 O 4 photocatalyst is rationally engineered, where incorporated Cu 2+ ( d 9 ) optimizes the occupation of active d xy / d xz orbitals in Co 3 O 4 , enabling symmetry-matched interactions with CO 2 and N 2 and reducing the C − N coupling barrier. This catalyst achieves a high urea yield of 25 μmol g −1 h −1 and a solar-to-urea conversion efficiency of ~0.035%, ranking among the top-performing systems for photocatalytic urea synthesis to date. Download: Download high-res image (115KB) Download: Download full-size image
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Siqi Liu,Zhaoliang Wu,Yuanrui Li,Jun Yu,Lei Zhang
Electrocatalytic CO 2 reduction reaction (CO 2 RR) provides a sustainable route for transforming CO 2 into value-added chemicals, yet achieving controllable selectivity remains a major challenge. Here, we constructed Ce-rich and Cu-rich Ce-Cu interfaces (CeCu 0.55 O x and CeCu 2.67 O x ) to elucidate the interfacial regulation of CO 2 RR pathways. CeCu 0.55 O x delivers a CH 4 Faradaic efficiency (FE) of 45% at –400 mA/cm 2 , whereas CeCu 2.67 O x achieves over 50% FE toward C 2 products. Operando Raman measurements reveal comparable Cu oxidation states during CO 2 RR, indicating that interfacial composition rather than Cu valence dominates selectivity. The Ce-rich interface accelerates H 2 O dissociation, increasing *H coverage and promoting sequential hydrogenation of *CO to CH 4 . In contrast, the Cu-rich interface strengthens *CO adsorption and increases its surface coverage, steering C−C coupling toward *OC-CO and enabling C 2 product formation. This work clarifies how tuning the Ce/Cu ratio modulates *H and *CO intermediate coverages, providing a mechanistic basis for designing oxide-metal interfaces with programmable CO 2 RR selectivity.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Haixia Wu,Sai Li,Dongyuan Yang,Yuhang Wang,Shuoshuo Wang,Yameng Ma,Zekai Ma,Na Liu,Kui Zhang,Haiyan Zhu,Shaobo Jia,Peng Ren,Qing Feng,Rui Tan,Zhiming Feng
Flexible zinc-air batteries (FZABs) hold great promise for powering next-generation wearable electronics, yet their advancement is hindered by sluggish oxygen electrocatalysis and poor cycling stability. Here, we employ a dielectric barrier discharge (DBD) plasma-assisted approach to modify CuO x /activated carbon (CuO x /AC) composite catalysts, offering a facile and scalable route to simultaneously tailor surface chemistry and nanostructure. The plasma treatment generates abundant oxygen vacancies and stabilizes mixed Cu + /Cu 2+ valence states, thereby accelerating both oxygen reduction and evolution reaction (ORR/OER) kinetics. It also produces a three-dimensional porous architecture of vertically aligned nanosheets with uniformly dispersed CuO x nanoparticles, enabling rapid electron/mass transport. When applied in FZABs, the CuO x /AC-DBD catalyst achieves a high peak power density (226 mW cm −2 ), an open-circuit voltage of 1.37 V, and remarkable cycling stability with 95% capacity retention. Compared with untreated catalysts, it exhibits a much lower charge-transfer resistance (12 Ω cm 2 ) and superior durability. This study demonstrates that DBD plasma engineering is an effective and low-cost strategy for designing high-performance bifunctional catalysts, paving the way for flexible and wearable energy storage devices.
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