CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ning Liu,Na Lu,Kun Zhao,Pengxiao Liu,ZhuMei Sun,Jing Lu
The conversion of methane (CH 4 ) and carbon dioxide (CO 2 ) into high-value products under mild conditions is crucial for addressing the greenhouse effect and advancing C1 chemistry. In this study, Cu/ZnO catalysts were prepared through a one-step wet reduction process, and the catalytic conversion of CH 4 and CO 2 into acetic acid molecules (CH 3 COOH) was achieved via photon activation at ambient temperature. The yield of acetic acid was 411.6 μmol/Lg cat −1 h −1 with a selectivity of 89.5 % under optimal conditions (100 mWcm −2 light intensity, 25 ± 2 °C, 2 MPa pressure, and a 1:1 CH 4 :CO 2 volume ratio). Enhanced solubility of CH 4 in aqueous under increased pressure and temperature was observed to improve acetic acid production. Additionally, the catalytic mechanism involved surface chemisorption of CH 4 and CO 2 , facilitated by ZnO and Cu in the catalyst, leading to C-C coupling and subsequent acetic acid formation, driven by photogenerated electron-hole migration. This study provides a foundational understanding for the synthesis of value-added chemicals through CH 4 and CO 2 conversion via C-C coupling in mild environments.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Jie Chen,Lizhu Guan,Minghui Xu,Tianyu Hu,Zhichao Pang,Dongming Shi,Weiyu Wang
The capacitive pressure sensor holds broad prospects in medical devices and electronic skins. However, challenges persist in enhancing the stability of its capacitance and its response/relaxation time. To tackle these issues, we have proposed a highly sensitive capacitive sensor based on polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) with a microcapsule structure coated with nano-ZnO. The sensor integrates a semiconductor filler within a porous microstructure, enabling it to be positioned within the matrix’s pores for the purpose of monitoring human health. This P(VDF-TrFE)-ZnO dielectric layer with a short rod-like ZnO particle-in-micropore (SRP-MP) structure effectively enhances the structural stability and capacitance change rate of the dielectric layer. It boasts an ultrahigh sensitivity of 3.1 kPa −1 , a broad pressure range of up to 50 kPa, an ultra-low relaxation response time of 23 ms, and the ability to detect an ultra-low minimum pressure of 50 Pa. The sensor’s structural stability has been significantly improved, and it has demonstrated excellent fatigue resistance in 10,000 cycles tests. Following this, we delved into the sensor’s sensing mechanism. To elucidate the reasons behind the sensor’s enhanced performance, we modeled its interior and conducted finite element analysis simulations (COMSOL) to investigate its internal sensing mechanism and piezoelectric response. Finally, we conducted various tests on the sensor’s human application to clarify its performance in actual situations, demonstrating significant application potential.
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Surfaces and Interfaces
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2025
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IF 6.3
Tianxun Gong,Mengya Yu,Zhenyi Liu,Luyu Lv,Wen Huang,Xiaosheng Zhang
Strain engineering has emerged as a powerful technique for modulating the bandgap in two-dimensional (2D) materials, including transition metal dichalcogenides (TMDCs) and graphene, which are critical for structural optimization in nanoelectronics and optoelectronics. Despite the promise of these materials, a significant challenge remains in achieving precise and controllable strain effects, particularly in graphene, to exploit its full potential in device applications. This gap in controllability limits the ability to fully leverage the sensitive changes in interfacial properties that strain can induce in 2D materials. Here, we present an approach to precisely control strain effects in monolayer graphene by applying mechanical force through a ZnO array substrate. The ZnO arrays were fabricated with controlled dimensions using lithographic templates, allowing for accurate strain modulation when graphene was wet-transferred onto the array. This method enabled effective coupling between the strain in graphene and the graphene/ZnO Schottky junction, significantly enhancing the device's optoelectronic performance. The resulting device demonstrated a broad response from ultraviolet to visible spectrum. Remarkably, the device achieved an outstanding responsivity of 39.1 mA W⁻¹ at 320 nm with a 3V bias. These findings provide a practical and innovative solution to the challenges of strain engineering in 2D materials.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Xin Liu,Qunzhi Zhu,Yaping Qian,Wenjing Wu
Access to clean water is a fundamental right for all individuals. However, globally, there are still 2 billion people who lack access to safe drinking water on a daily basis. Solar-driven interfacial evaporation (SDIE) has been widely explored in recent years as an effective and convenient method for desalination. However, the design and fabrication of photothermal evaporators still face challenges such as rational selection of interface materials, optimizing the evaporator preparation process, controlling the production cost, optimizing the thermal management system, and ensuring stability under different environmental conditions. This study employed a simple one-step hydrothermal and vacuum freezing method to prepare an aerogel with a synergistic effect for photothermal conversion. By doping the semiconductor ZnO into the Ag/GO composite aerogel, light absorption was maximized and efficiently converted into thermal energy, thereby improving overall photothermal conversion efficiency. The prepared ZAGA-1–1 photothermal evaporator achieved an evaporation rate of 3.52 kg m −2 h −1 at 1 kW m −2 with an efficiency of 92.63 %. Additionally, ZAGA-1–1 exhibits excellent hydrophilicity and salt removal ability, while maintaining a stable evaporation rate over 20 cycles. These properties demonstrate the great potential of ZAGA-1–1 for large-scale solar desalination applications.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Haofeng Zhu,Juan Wu,Zijian Tong,Qiuyue Zhao,Qinghua Zhou,Anping Zhang,Jianqiang Sun
The continuous accumulation of metallic nanoparticles and pesticide residues in agroecosystems poses potential risks to food safety and plant health, yet their potential interactive toxicity remains poorly understood. Here, we investigated the mutual effects of zinc oxide nanoparticles (ZnONPs) and the imidacloprid (IMI) on their bioaccumulation, phytotoxicity and the underlying molecular mechanisms in lettuce. After 14 days of exposure, co-exposure to ZnONPs and IMI significantly aggravated phytotoxicity compared to individual treatments, as evidenced by greater biomass reduction, elevated oxidative stress, and intensified metabolic disruptions. Additionally, mixture treatments significantly increased both Zn and IMI accumulation in shoots, indicating enhanced uptake and upward translocation due to their coexistence. The biotransformation of IMI into 5-OH-IMI was enhanced by ZnONPs by 5.8–130 % in lettuce, with the magnitude depending on particle size and IMI concentration. For the comparison between different particle sizes, 90 nm ZnONPs led to higher Zn and IMI accumulation in shoots, whereas 30 nm ZnONPs more efficiently enhanced IMI metabolism. These accumulation patterns were closely linked to the distinct metabolic reprogramming. Co-exposure uniquely activated pathways related to amino acid and energy metabolism, indicating increased amino acid turnover and elevated energy demand for detoxification and damage repair. Altogether, the findings provide new mechanistic insights into nanoparticle–pesticide interactions in edible plants and emphasize the need to consider co-contaminant scenarios in environmental risk assessment.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Mengshi Chen,Zihan Kang,Jingjing Ning,Ni Qin,Dinghua Bao
A novel fabrication method was developed to synthesize ZnO/Bi 2 SiO 5 heterostructure films with enhanced piezo-photocatalytic activity for efficient water pollutant removal. The heterostructure was constructed through in-situ growth of ZnO nanorods on inverse opal structured Bi 2 SiO 5 films. The ZnO/Bi 2 SiO 5 heterointerface significantly increases charge carrier concentration, while the inverse opal morphology enhances light harvesting through diffuse reflection effect. The optimized ZnO/Bi 2 SiO 5 films demonstrated remarkable degradation efficiency for Rhodamine B (RhB), achieving substantially higher performance under combined UV and ultrasonic excitation compared to individual ZnO or Bi 2 SiO 5 films. This enhanced activity is attributed to synergistic effects between the heterostructure and piezoelectric properties, which collectively promote charge separation and catalytic activity. This work provides two significant advances: (i) a facile route for fabricating ordered heterostructure photocatalysts, and (ii) a demonstrated strategy for boosting piezo-photocatalytic efficiency through precise morphological and structural control. The developed ZnO/Bi 2 SiO 5 system shows strong potential for practical applications in water pollution remediation, offering both high performance and environmental sustainability.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Yu Chen,Yiwen Zhong,Zenghui Diao,Diyun Chen,Lingjun Kong
This study addresses the challenge of eliminating persistent antibiotics like levofloxacin (LEV) from wastewater by developing a ZnO/ZnFe 2 O 4 heterojunction catalyst through a sol-gel method. The heterojunction synergistically combines ZnO and ZnFe 2 O 4 to reduce bandgap energy (1.89–1.99 eV) and enhance visible-light absorption. Under energy-efficient LED irradiation (5 W, 320–780 nm), the ZnO/ZnFe 2 O 4 -PMS system achieved 94.11% LEV degradation within 90 min, alongside 58.61% total organic carbon removal efficiency and 71.69% defluorination efficiency, outperforming individual components and physical mixtures. Mechanistic investigations revealed that reactive oxygen species ( 1 O 2 , SO 4 - ∙, ‧O 2 - and ‧OH) and holes jointly oxidize LEV. The heterojunction’s built-in electric field effectively suppressed charge recombination, as being confirmed by photoluminescence and photocurrent analyses. Remarkably, the catalyst retained >87% efficiency over four cycles with negligible metal leaching efficiency (<1%), demonstrating robust stability. This work highlights the dual advantages of the ZnO/ZnFe 2 O 4 heterojunction and LED-driven activation, offering a scalable and energy-efficient strategy for antibiotic wastewater remediation.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Lin Chen,Xi Chen,Fei Wang,Yu Tong,Kewei Zhang,Zhengbo Han,Mingzhe Zhang
Metal-organic frameworks (MOFs) are regarded as potential candidate materials with great application prospects in the field of gas sensing. In this study, MOF derivatives were anchored onto MXene sheets through self-assembly technology to prepare a heterojunction material ZnO/Ti 3 C 2 T x MXene with high specific surface area, achieving ultrafast dual gas sensing behavior for H 2 /NO 2 . At a low temperature of 80°C, the ZnO/ Ti 3 C 2 T x MXene heterojunction sensor exhibited an ultrafast response (23.17%) to 500 ppb H 2 within 3.2 s. After a moderate temperature increase to 180°C, it also demonstrated significant sensing performance (46.3%) to 500 ppb NO 2 within 4 s. The electronic interaction mechanism of ZnO/ Ti 3 C 2 T x MXene heterostructures in H 2 and NO 2 detection was revealed through density functional theory calculations and in-situ Raman spectroscopy, clarifying the influence of interfacial charge transfer on sensing performance. Heterogeneous structures achieve the regulation of gas adsorption-induced electron rearrangement and carrier modulation by constructing interface charge-regulating channels, significantly enhancing the response rate, selectivity and reversibility in the detection of H 2 and NO 2 , thereby enabling highly sensitive and trace detection of the two gases.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Cong Li,Nuramina Abdukirim,Tursun Abdiryim,Ruxangul Jamal,Feng Xu,Yaoming Yu,Sihuleng Ba
Oxygen vacancy (V O ) engineering is an effective strategy for enhancing the performance of electrocatalytic CO 2 reduction (eCO 2 RR) to CO. In this study, composite materials of zinc oxide (ZnO) and polypyrrole (PPy) were prepared via in situ polymerization, with the V O concentration precisely controlled by adjusting the PPy molar ratio. The V O concentration first increased and then decreased as the PPy content decreased, while the zinc vacancy (V Zn ) concentration exhibited an opposite trend. Characterization results indicate that the PPy conjugated framework dynamically regulates the V O /V Zn concentration through electron injection, and its controllable hydrophobicity enhances CO 2 mass transfer and interfacial enrichment. Crucially, experiments reveal that a high V O concentration is key to achieving high performance, as V O reduces the activation energy barrier for C O bond cleavage through charge redistribution, synergistically optimizing the adsorption energy of the *COOH intermediate. Density functional theory calculations confirm that Vo regulates the d-band center position of ZnO and reduces the activation energy barrier for CO 2 activation. The optimal sample, V O -enriched ZnO/PPy-4, achieves an FE CO of 73.8 % at −1.6 V (vs. RHE) and stably maintains CO/H 2 ratio of 2:1 at −1.2 V (vs. RHE), with < 5 % decay rover 8 h. This study demonstrates a strategy for obtaining high-performance electrocatalytic CO 2 reduction catalysts by regulating Vo concentration.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Lingjun Zhou,Wenyan Zheng,Muzhi Cai,Feifei Huang,Ying Tian,Shilong Zhao,Liaolin Zhang,Junjie Zhang
The TeO 2 -ZnO-Na 2 O glass system demonstrates significant promise for mid-infrared laser applications due to its high refractive index and low phonon energy, although it is inherently limited by poor thermal stability. Traditional methods aimed at enhancing thermal stability, such as the incorporation of intermediates, typically result in compromised optical performance. However, this study introduces a synergistic optimization strategy through strategic Ta 2 O 5 doping. A systematic analysis utilizing Differential Scanning Calorimetry (DSC), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and photoluminescence (PL) spectroscopy has uncovered a novel correlation between optical performance and average rather than maximum phonon energy. This discovery provides a refined theoretical framework for the design of tellurite glasses. The optimized Tm 3 -doped TZNT4 glass, with a glass transition temperature ( T g ) of 388 °C and a thermal stability range ( ΔT ) of 137 °C, demonstrates excellent absorption (9.1 ×10 −21 cm 2 ) and emission cross-sections (7.1 ×10 −21 cm 2 ) at 2 μm. This work establishes a structure-property-performance paradigm for tellurite glasses, effectively addressing the critical trade-off between thermal robustness and mid-infrared emission performance through rational composition engineering.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Ting Pan,Danni Wang,Yanyu Song,Yongdi Liu,Long D. Nghiem,Jun Duan,Chengdan Che,Xianbo Sun,Zhengqing Cai
This study synthesized MnFe 2 O 4 @S-ZnO with varying S-ZnO loading and investigated their catalytic activity towards Fenton degradation of norfloxacin (NOF). The MnFe 2 O 4 @S-ZnO/H 2 O 2 system achieved 98.3 % of NOF removal within 60 min, with the catalytic activity enhanced by 1.8 times compared to MnFe 2 O 4 . XPS results indicated that Mn and Fe are the active catalytic sites. The doping of S elements accelerated the reduction rates of Fe 3+ and Mn 3+ , thereby improving the utilization efficiency of H 2 O 2 and generating more •OH radicals. The Lewis acidic sites on the surface of MnFe 2 O 4 @S-ZnO coordinated with and reduced the concentration of OH − in the suspension, thereby increasing the acidity of theMnFe 2 O 4 catalyst surface, expanding the pH range of the Fenton reaction to alkaline conditions, allowing the composite material to maintain a NOF removal efficiency of over 90.0 % at even high pH (9.0–10.0). The presence of inorganic anions and humic acid (HA) played negative roles on the NOF degradation, but the MnFe 2 O 4 @S-ZnO/H 2 O 2 system can still achieve a minimum NOF degradation of 62.8 % within 60 min. Moreover, the MnFe 2 O 4 @S-ZnO catalyst exhibited relatively high stability and possessed easy recoverability. Furthermore, this catalyst overcomes the pH limitations of the traditional Fenton reaction, demonstrating significant advantages and promising application prospects.
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Yuhui Liu,Alei Dang,Xin Liu,Xiangkai Wang,Amir Zada,Jiahe Chen,Xiaoyi Fan,Tingkai Zhao,Jing Li,Tiehu Li
Developing flexible substrates with high sensitivity, good reproducibility and recyclability is a major challenge in surface enhanced Raman scattering (SERS) research. Herein, we prepare a recyclable Ti 3 C 2 MXene/ZnO quantum dots (Ti 3 C 2 /ZnO) heterostructure film as an efficient SERS sensor with remarkable flexibility using vacuum assisted filtration technique. Benefiting from the more charge transfer (CT) paths, higher CT efficiency provided by oxygen vacancies (OVs) in ZnO QDs and Schottky barrier between Ti 3 C 2 and ZnO QDs, the limit of detection (LOD) for 4-mercaptopyridine (4-MPY) molecules was as low as 1×10 −7 M. In addition, the prepared flexible SERS film provided uniform and stable signals for both temporal (storage at room temperature for 60 days) and spatial (RSD = 10.7 %) scales due to the optimal distribution of ZnO QDs in the macroscopic assembly of Ti 3 C 2 /ZnO hybrid with excellent reliability and durability. Moreover, the prepared novel flexible SERS sensor achieved self-cleaning by photocatalytically degrading methylene blue (MB) residues extracted from the surface of orange peels and showed exceptional reusability during the detection process. Thus, this high-efficiency and low-cost flexible recyclable SERS sensor may be useful for the in-situ molecular detection in food security and environmental protection.
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高影响因子
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