FUEL PROCESSING TECHNOLOGY
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2025
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IF 7.7
Yadi Jia,Pinjing He,Fan Lü,Wei Peng,Hua Zhang,Khamphe Phoungthong
In response to the growing challenge of photovoltaic waste management, developing sustainable and value-added treatment strategies is imperative. In this study, ethylene-vinyl acetate (EVA) resins sourced from waste photovoltaic modules and virgin materials were utilized for the production of hierarchical porous carbon (HPC) and methane-rich combustible gas via autogenic pressure pyrolysis coupled with KOH activation. Temperature-dependent pyrolysis revealed that 700 °C was the optimal condition, yielding pyrolysis gas with a high methane content (43.39 vol%) and producing graphitized carbon spheres. Subsequent KOH activation generated HPC with a large specific surface area of 765.4 m 2 /g. When applied as a supercapacitor electrode in 6 mol/L KOH electrolyte, the HPC exhibited a high specific capacitance of 152 F/g at 0.2 A/g. Additionally, EVA resins with higher vinyl acetate content and melt index (MI) produced greater amounts of methane and pyrolytic carbon, while the resins with lower MI values showed enhanced reactivity toward chemical activation. This work offers a green and efficient route for the high-value recycling of EVA in PV waste and contributes to the sustainable synthesis of advanced HPC materials for energy storage applications.
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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 COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Linghu Meng,Yuli Zhao,Guiwu Liu,Siwei Liu,Xiangzhao Zhang,Shahid Hussain,Mingyuan Wang,Guanjun Qiao
Real-time, room-temperature nitrogen dioxide (NO 2 ) monitoring is crucial for protecting human health and the environment, yet conventional sensors face limitations on high-temperature operation and external power dependence. Here, we report a self-powered zinc-air battery-driven NO 2 gas sensor based on a multiple grain boundary-engineered CeO 2 (MGB-CeO 2 ) air cathode. Abundant grain boundaries in MGB-CeO 2 promote oxygen vacancy formation, providing more active sites that facilitate NO 2 adsorption and charge transfer. Compared to nanorod CeO 2 (NR-CeO 2 ) sensor, the MGB-CeO 2 sensor achieves a 3.5-fold higher response of 21.2 % to 10 ppm NO 2 , along with shorter response and recovery times. Density functional theory (DFT) calculations confirm significantly higher NO 2 adsorption energy for MGB-CeO 2 than that for NR-CeO 2 , which can be attributed to its defect-rich structure. The MGB-CeO 2 sensor presents outstanding selectivity, low practical limit of detection, and excellent long-term stability. This work provides a novel strategy for the development of self-powered gas sensors, offering valuable insights into electrochemical sensing for practical implications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zi-Han Song,Kuo Zhang,Yue-Chao Yuan,Hong-Miao Wang,Xin He,Jing-Jing Pang,Jian Xu
Given the increasing demand for energy-efficient natural gas purification, the development of porous adsorbents capable of achieving high-purity methane (CH 4 ) from natural gas with a considerable productivity is highly desirable yet challenging. To this end, we herein report a new fluorine-functionalized ultramicroporous metal-organic framework constructed based on heterometallic Cu + -In 3+ ions and 3-fluoroisonicotinate (3-fin) ligand, termed as NKU-0803 . Conceivably, this fluorine-functionalization strategy not only introduces active binding sites but also fine-tunes the pore size. As a result, the framework shows high affinity to ethane (C 2 H 6 ) and propane (C 3 H 8 ) in terms of synergistic C H⋯π and C H⋯F hydrogen bonding interactions, contributing to exceptional low-pressure uptake capacity of C 2 H 6 (44 cm 3 g −1 at 10 kPa and 298 K) as well as commendable adsorption selectivities of C 2 H 6 /CH 4 (77) and C 3 H 8 /CH 4 (295) at 100 kPa and 298 K. Dynamic breakthrough experiments prove that the MOF could effectively separate polymer-grade CH 4 (>99.99 % purity) from C 3 H 8 /C 2 H 6 /CH 4 ternary mixtures (5/10/85, v / v / v ) at ambient conditions. The high CH 4 productivity (138 cm 3 g −1 ) and excellent recyclability position it as a promising industrially viable benchmark adsorbent for natural gas purification.
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FOOD CHEMISTRY
·
2025
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IF 9.8
Guo Li,Xiaochen Zhang,Dong Li,Yanqun Xu,Lei Wang,Jia Zeng,Tianhua Huang,Junlai Nian,Song Shi,Chongde Sun,Gaoyang Li,Juming Yao,Zisheng Luo
Wax coating is an important preservation method extending jujube's shelf life. Although wax-based coatings provide a moisture resistant and physical microbial barrier, their dense structure excessively restricts the CO 2 and O 2 permeation, leading to anaerobic respiration and off-flavor. To increase the CO 2 and O 2 permeation of wax-based coating while minimizing its impact on inherent properties, microcrystalline cellulose cryogel particles (CCPs) were developed and incorporated into carnauba wax-based edible coating (CCPCW) creating micro gas channel. 1.00 % CCPCW increased the CO 2 and O 2 permeability by 190 % and 227 %, compared to CW, respectively. The inherent properties of CW, moisture and physical fungal barrier were retained. Finally, the jujube preservation performance of CCPCW was conducted. The CCPCW reduced the acetaldehyde and ethanol production of jujubes by 34.79 % and 15.81 %, respectively. These findings underscore the potential of CCPCW as an effective edible coating for mitigating off-flavors in jujube preservation.
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JOURNAL OF LIGHTWAVE TECHNOLOGY
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2025
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IF 4.8
Hongrong Zheng,Xin Kang,Qihao Yang,Haider Syed Irshad,Dingyi Feng,Fu Liu,Xuetao Gan,Biqiang Jiang
Recent increased attention to environmental and health monitoring demands faster response and reliable gas concentration measurement technology. Herein, we propose an optical fiber-based strategy for fast ethanol gas concentration sensing using a tilted fiber grating (TFG) assisted with a nanolayer of HKUST-1. The TFG excites unique cladding mode resonances and strong evanescent field that interact with the in-situ grown HKUST-1 nanolayer that provides a path for the penetration and absorption of ethanol gas. The TFG, functionalized with 281 nm thick HKUST-1 nanolayer, exhibits a sensitivity of 7.7 nm/% over an ethanol gas concentration range of 0∼0.14% and a limit of detection of 35 ppm at room temperature, by tracking the resonance wavelength shift of a cladding mode. Time-domain experiments reveal the response and recovery times of 26.7 s and 10.3 s, respectively, attributed to the high surface area and porosity of the HKUST-1 nanolayer. The proposed fiberoptic ethanol gas sensor offers ease of integration, rapid response, and high repeatability and reliability, making it suitable for applications such as chemical plant leakage monitoring and medical breath analysis.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Chen Min,Liu Longgang,Chen Xueyan,Qin Xiaoxiao,Zhang Jianghao,Xie Shaohua,Liu Fudong,He Hong,Zhang Changbin
Efficient heterogeneous catalyst design primarily focuses on engineering the active sites or supports, often neglecting the impact of trace impurities on catalytic performance. Herein, we demonstrate that even trace amounts of sulfate (SO 4 2− ) residuals on Ru/TiO 2 can totally change the CO 2 reduction from methanation to reverse-water gas shift (RWGS) reaction under atmospheric pressure. We reveal that air annealing causes the trace amount of SO 4 2− to migrate from TiO 2 to Ru/TiO 2 interface, leading to the significant changes in product selectivity from CH 4 to CO. Detailed characterizations and DFT calculations show that the sulfate at Ru/TiO 2 interface notably enhances the H transfer from Ru particles to the TiO 2 support, weakening the CO intermediate activation on Ru particles and inhibiting the further hydrogenation of CO to CH 4 . This discovery highlights the vital role of trace impurities in CO 2 hydrogenation reaction, and also provides broad implications for the design and development of more efficient and selective heterogeneous catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Yanshi Zheng,Junguo He,Shan Qiu,Dehai Yu,Yingshi Zhu,Heliang Pang,Jie Zhang
Electro-Fenton (EF) is a promising electrochemical technology in degrading recalcitrant organic pollutants . However, the technology faces problems of high energy consumption, low cathodic oxygen transfer rate and low H 2 O 2 production efficiency. Therefore, a novel air-breathing gas diffusion electrode (GDE) with multiform hydrophobic layers was prepared by a facile method. The novel GDE allows the air to diffuse to the triphase interface spontaneously, eliminating the cost of aeration. Also, the multiform hydrophobic layers can greatly improve the oxygen transfer rate and expand the triphase interfaces in the GDE, resulting in a high H 2 O 2 accumulation of 44.30 mg L −1 cm −2 h −1 without aeration, which was 18 times higher than that of the virgin cathode. A 100% degradation efficiency of sulfadiazine (SDZ) was achieved with the fabricated GDE in 10 min in EF system. Moreover, theoretical calculations were performed for accurately elucidating the SDZ degradation mechanism and pathway.
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JOURNAL OF CHROMATOGRAPHY A
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2025
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IF 4
Mengting Huang,Jianna Yu,Xiuqing Zheng,Jiaxu Liu,Peixuan Huang,Guoxing Jing,Wen Liu,Wenshan Li,Wenjie Liu
The detection of potent carcinogenic nitrosamine impurities in pharmaceutical products has attracted significant regulatory attention in recent years, and advanced analytical methods are needed to accurately quantify nitrosamines in pharmaceutical products. In this study, a headspace gas chromatography-ion mobility spectrometry (HS-GC-IMS) method was proposed and validated, which addresses two key challenges: achieving the sub-ppb sensitivity required for low-concentration nitrosamine analysis, and reducing matrix interferences in extended-release formulations. Seven investigated nitrosamines showed good linearity (R 2 >0.99) in the range of 0.5-100 ng/mL, with limits of detection (LOD) of 0.05-0.51 ng/mL and limits of quantification (LOQ) of 0.16-1.70 ng/mL. Precision studies (intra-day relative standard deviation RSD<5%, inter-day RSD<13%) and satisfactory spiked recoveries (84.31%-106.60%) in active pharmaceutical ingredient matrices confirmed the robustness of this method. The developed method eliminates the need for complex extraction and pre-concentration procedures, requires minimal sample preparation and enables rapid gas chromatography separation.
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Journal of Materials Chemistry B
·
2024
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IF 6.1
Wenbo Wang,Zhaoyi Cheng,Hui Xing,Shihao Zhou,Qiaozhang Ye,Guan-Hai Wang,Gaofei Xiong,Dong Ma
Nitric oxide (NO) gas molecules have demonstrated remarkable anti-tumor effects and minimal susceptibility to drug resistance, establishing as a promising modality for effective tumor treatment. However, how to realize its stable and efficient delivery in vivo is still a challenge. In this study, we have developed a heat-responsive biomimetic nano erythrocyte (M/B@R) by loading the NO donor (BNN6) onto the mesoporous Prussian blue (M-PB) and subsequently enveloping them with red blood cell membranes. The preserved integrity of the red blood cell membrane (RBCm) structure could ensure its excellent biosafety, prolong its circulation time within the bloodstream and then enhance the accumulation of BNN6 at tumor sites. When M/B@R is stimulated by near-infrared light (NIR-II, 808 nm) irradiation, the nanoparticle could generate significant heat for photothermal therapy (PTT) by the characteristic NIR absorption of M-PB and then NO also could be efficiently released. The generated NO further facilitates the formation of ONOO−, a highly toxic species to the tumor, while also alleviating tumor hypoxia. Remarkably, M/B@R, with NIR as the excitation source, induces the combined lethality through hyperthermia, DNA damage, and tumor hypoxia relief. This novel combination strategy provides a new avenue for PTT/NO-induced cancer therapy.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 16
·e55253
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IF 2.7
Xiaocan Zhang,Siqin Zeng,Jiashu Long,Xuesong Li,Yutong Zhao
Using porous materials to selectively adsorb H 2 O from natural gas is a promising method to dehydrate methane (CH 4 ). The structure of a Zirconium metal-organic framework (Zr-MOF), namely, MIP-202, features a high density of amino groups, which can produce strong hydrogen bonding with H 2 O molecules. MIP-202 is cost-effective, green and scalable, and it exhibits good chemical stability under various conditions. This work incorporated MIP-202 nanoparticles into the high permeability polymer polyetherimide (PEI), and the obtained Mixed Matrix Membranes (MMMs) was used for the gas separation of H 2 O/CH 4 . It is found that MMMs loaded with 20 wt% of MIP-202 demonstrated a high H 2 O/CH 4 selectivity of 832.2, which was about 760 times of that of the pure PEI. This approach offers a new route to fabricate functional membranes for energy-efficient gas separations.
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MINERALS ENGINEERING
·
2024
·
IF 4.9
Zuli Mo,Qingliang Wang,Zhimin Guo,Zhiwu Lei,Fang Hu,Eming Hu,Pengfei Hu
Treatment of uranium-containing wastewater has become an increasingly important research focus with the exploitation and utilization of uranium resources. The introduction of new technologies and continuous updating of existing technologies are the urgent tasks for the treatment of uranium-containing wastewater. Ion flotation is one technology with the potential to address uranium contamination. In this study, the improved ion flotation technique for removing U(VI) from acidic solutions was established by colloidal gas aphrons (CGAs). The CGAs were produced by stirring cetyltrimethylammonium bromide (CTAB) solutions at high speed. Measurements of half-life, gas hold-up, bubble size distribution and zeta potential of CGAs have been performed in this work. In the batch process, as CGAs continued to be added, the uranium removal increased steeply at first then slowly, and finally leveled off. At pH 6, the final uranium removal can reach the highest 99.3 % at an initial uranium concentration of 2.5 mg/L. The effective removal of U(VI) by the CGAs formed by cationic CTAB indicated that U(VI) existed as anionic species under these conditions. It was found that the concentration of carbonate ions in solution increased with the increase of flotation time, which may be caused by the dissolution of carbon dioxide brought in by bubbles. The calculation results of Visual MINTEQ software show that the concentration of carbonate ions generated at pH 6 is sufficient for anionic uranium-carbonate to dominate. In addition, it was found that the size and zeta potential of CGAs all played a significant role in removing U(VI) from the acidic solution.
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