CHEMOSPHERE
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2020
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IF 5.778
Kexin Chen,Xi Wang,Pengfei Xia,Jinxin Xie,Jing Wang,Xukai Li,Yiming Tang,Laisheng Li
Z-scheme Cu 2 O-(rGO-TiO 2 ) photocatalyst was successfully synthesized via a simple three-step approach for 2,2′,4,4′-tretrabromodiphenyl ether (BDE47) reductive removal under simulated solar irradiation. Unlike the traditional heterojunction , the addition of reduced graphene oxide (rGO) enhanced the redox ability of Cu 2 O-TiO 2 by increasing charge transfer. When modifying Cu 2 O films by adding 1% rGO and coating with 70% TiO 2 , the resulting Cu 2 O-(rGO-TiO 2 ) exhibited the best photocatalytic activity for BDE47 removal. The charge transfers of Cu 2 O-(rGO-TiO 2 ) were proven to follow a Z-scheme pathway through the electron paramagnetic resonance analysis. The degradation pathways of BDE47 were elucidated by identifying intermediate products via gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC). Photo-electrons (e − ) generated from the conduction band of Cu 2 O and hydrogen protons (H 0 ) reduced from H + in water were the main contributing elements for the removal of BDE47, which response to the ortho and para debromination . Ortho-Br of BDE47 was attacked by e − and BDE28 was the dominant debromination product on the first stage. Then e − and H 0 attacked ortho-Br and para-Br of BDE28 to form BDE15 and BDE8, respectively. The concentration of BDE8 was higher than that of BDE15, suggesting that H 0 played the most important role on the second debromination stage. An effective Cu 2 O-(rGO-TiO 2 )-based Z-scheme system for BDE47 debromination was proposed in this study, which may contribute to the development of novel green technologies.
研究领域:
环境科学
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光催化化学
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环境污染与控制
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材料科学
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绿色技术
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有机污染物降解
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DOI
高影响因子
AICHE JOURNAL
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2026
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IF 4
Puxin Shi,Liping Luan,Bo Zhang,Islam Mohammad Mahfuzul,Zhi Wang,Xinlei Liu
High-performance H 2 /CO 2 separation with good scalability is needed in industry. Here, we fabricated mixed polymer fragment membranes on alumina tubes. The synergistic control of monomer diffusion rate promoted the formation of H 2 selective channels, thereby elevating the H 2 /CO 2 separation performance. The membranes, each with an area of 37.7 cm 2 , demonstrated a high H 2 /CO 2 selectivity of 22.5 (with a corresponding H 2 permeance of 209 GPU) at 150°C and 2 bar, high pressure resistance (H 2 permeance and H 2 /CO 2 selectivity were 212 GPU and 11.1 at 200°C and 10 bar, respectively), and good reproducibility. Furthermore, we studied the effects of sweep gas, permeate pressure, reuse of substrates, and H 2 O and H 2 S contaminants on membrane performance, pointing out that the membranes can be well adapted to industrial relevant conditions. In addition, a two-stage membrane system was designed to produce high concentration H 2 with a good yield.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
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IF 6.2
Zong-Pin Fu,Yun-Peng Zhao,Yu-Fa Wu,Qi-Jie Zhou,Shu-Ting Hu,Le-Le Qiu,Fang-Jing Liu,Mei Zhong,Jing Liang,Jing-Pei Cao
Mild thermal dissolution is an effective method for the clean, low-carbon conversion of lignite. However, the resulting products still contain numerous oxygen-bridged bonds and heavy molecular compounds, requiring further upgrading to serve as suitable feedstocks for fuels and chemicals. In this study, a supported Cu-Ni bimetallic catalyst was synthesized via a co-precipitation method and applied to the catalytic hydroconversion (CHC) of thermal dissolution portions from Zhaotong lignite (ZT) and lignite-related model compounds (LRMCs). Catalyst characterization revealed that metal particles were uniformly dispersed on the surface of the Cu-Ni/CoOx-CeO 2 catalyst, along with the formation of defect sites. The CoOx-CeO 2 support promoted surface oxygen vacancy formation. Furthermore, the incorporation of Ni altered the local coordination environment of Cu species through multicomponent interactions. The synergy between interfacial oxygen vacancies and Cu-Ni bimetallic sites significantly enhanced catalytic activity. Tests with LRMCs indicated that the Cu-Ni/CoOx-CeO 2 catalyst selectively cleaves C-O ether bonds under mild conditions, exhibiting both high selectivity and strong hydrogenation activity in the CHC of phenolic compounds. The catalyst also effectively promoted the CHC of macromolecular species in the soluble portion from ZT thermal dissolution, thereby converting phenolic compounds into cycloalkanol. These finding provides valuable insights for developing staged conversion routes and achieving value-added utilization of lignite.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 11.3
Junhui He,Nan Wang,Lihua Zhu,Long Zhao
Polybrominated diphenyl ethers (PBDEs) are highly hydrophobic and environmentally persistent, leading to their accumulation in soils and posing serious risks to ecosystems and human health. This study developed an efficient remediation strategy through the synergistic integration of chemical leaching and electron beam (EB) irradiation for treating PBDEs-contaminated soils. EB irradiation alone could directly degrade PBDEs in soil, while a combination with methanol extraction enhanced the process. Methanol effectively extracted BDE47 from soil with an efficiency exceeding 99 % and BDE47 in methanol was degraded rapidly under EB irradiation, achieving complete debromination at a dose of 12 kGy. The leaching agent exhibited excellent reusability over five consecutive cycles, with both extraction and debromination efficiencies remaining consistently high. Moreover, this method demonstrated broad applicability by effectively degrading multiple PBDE congeners. Mechanism studies through ESR and deuterated solvent experiments revealed that electron transfer is the rate-determining step in PBDE degradation, and the debromination rate was independent of the number and position of bromine substituents. This capability represents a significant advantage of EB irradiation over conventional reductive degradation techniques, enabling complete debromination of various PBDEs. This work presents a green and sustainable technology for the remediation of PBDE-contaminated sites, offering significant environmental benefits and promising practical prospects.
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PubMed
高影响因子
ENERGY & FUELS
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2026
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IF 5.3
Chuang Zhang,Yue Wang,Xin Hu,Wei Jiang,Xiao-Yan Zhao,Chen Xu Chen,Wen Li,Jing-Pei Cao
Selective hydrogenolysis of C–O bonds in lignin is widely regarded as the most promising strategy for generating high-value chemicals and clean liquid fuels. Ni–Ru bimetallic catalyst supported on solid superacid was successfully synthesized and applied to the cleavage of C–O bonds in diphenyl ether (DPE) and alkali lignin. The catalytic hydrogenolysis of DPE over a 10%Ni–0.5%Ru–S2O82–/ZrO2 catalyst produced 88.0% cyclohexanol. Additionally, 10%Ni–0.5%Ru–S2O82–/ZrO2 catalyzed the depolymerization of alkali lignin in high yields of phenolic compounds, primarily including guaiacol and methoxyphenol. The synergistic effect between Ni and Ru promoted electron transfer from Ni to Ru. The incorporation of Ru improved the dispersion of Ni and reduced the average particle size of metallic Ni. The strong acidity of the solid superacid support provided abundant acidic sites, facilitating hydrogen atom adsorption and thereby promoting C–O bonds cleavage.
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JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Fangyu Meng,Ziheng Liu,Daxin Shi,Yaoyuan Zhang,Kangcheng Chen,Qin Wu,Hansheng Li
Homogeneous and transparent proton exchange membranes (PEMs) denoted as HBPPQ/PPQ-x are fabricated via in situ combination of hyperbranched polyphenylquinoxaline (HBPPQ) and linear polyphenylquinoxaline (PPQ). The rigid hyperbranched structure generates stable nanocavities, giving HBPPQ/PPQ-50 high fractional free volume (FFV) of 37%. Moderate main-chain basicity provides favorable phosphoric acid (PA) affinity, leading to the PA uptake of 334%. HBPPQ/PPQ-x membranes exhibit pronounced anisotropic swelling and proton conduction behavior. HBPPQ/PPQ-50 delivers the σ ⊥ of 76 mS cm −1 at 180 °C, 3.1 times the in-plane conductivity ( σ // ). It shows an open-circuit voltage of 1.004 V, higher than commercial PBI (0.977 V), and maximum power density of 1122 mW cm −2 , twice that of PBI at 180 °C without back pressure. No obvious voltage decay is observed during 200 h durability test at 160 °C and 0.2 A cm −2 . These results demonstrate that constructing high free volume hyperbranched/linear composite membranes is an effective strategy to simultaneously enhance PA uptake, proton conduction, and HT-PEMFC performance.
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FOOD CHEMISTRY
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2026
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IF 10.4
Ziteng Huang,Yaru Li,Yuyang Hu,Qiankun Xu,Danya Li,Juzhou Zhang,Xianbiao Wang
Friedel–Crafts acylation yields β-diketone polymer superior to Claisen condensation. • The probe exhibits a vivid green-to-blue shift and intensity enhancement with Al 3+ . • Conformation restriction by Al 3+ coordination enables fluorescence change. • Dual-mode sensing enables both visual screening and precise quantification. • Results in wheat food samples show high consistency with standard ICP-MS methods. Aluminum additives in flour-based foods pose safety concerns and require rapid monitoring. This study presents a high-performance β-diketone main-chain polymer fluorescence sensor synthesized via Friedel–Crafts acylation for specific aluminum detection. This preparation method yielded a polymer with superior sponge-like porosity and extended π-conjugation. Upon Al 3+ coordination, the probe exhibits a distinct fluorescence transition from dim green to brilliant deep blue, enabling visual identification. The response follows a positive cooperative logistic model, achieving a limit of detection of 1.78 μmol/L. Mechanistic studies attribute signal enhancement to a synergistic effect, where coordination restricts the conformational relaxation of the polymer backbone to suppress non-radiative decay while simultaneously increasing radiative oscillator strength. Validated in wheat derivatives with a calibration strategy, the method achieved quantitative results consistent with inductively coupled plasma mass spectrometry. This work highlights the value of backbone-integrated recognition sites and conformational restriction for sensing. A β-diketone main-chain polymer fluorescence sensor addresses the challenge of monitoring aluminum in wheat-based foods. The probe exhibits a positive cooperative logistic response to Al 3+ , characterized by a vivid green-to-blue emission shift. By leveraging a coordination-induced restriction of main-chain conformational relaxation mechanism, the sensor achieves excellent selectivity and sensitivity, allowing for both naked-eye inspection and precise instrumental quantification in real samples. Download: Download high-res image (140KB) Download: Download full-size image
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124698
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IF 7.5
Jing-jing Wu,Jia-yuan Tian,Feng Lin,Yu-long Ma,Yong-gang Sun,Pei Ma,Shuai-lei Li,Xue Zhang,Yi-shu Ma,Xiao-lin Xue
The efficient hydrodeoxygenation (HDO) of lignin oil to produce high-value-added cycloalkanes is a key route for biomass resource utilization. However, developing catalysts with both high catalytic activity and product selectivity remains a crucial challenge in this field. Herein, a strategy integrating crystalline-phase regulation and hydrogen spillover was proposed. Ru was doped into the ZIF-67 precursor via a one-pot method. After controlled calcination and hydrogen reduction, a nitrogen-doped carbon-coated Ru-Co bimetallic catalyst (RuCo@NC) was successfully prepared. Characterization results showed that the introduction of Ru induced the phase transformation of Co from face-centered cubic (FCC) to hexagonal close-packed (HCP) and precisely regulated the electron density distribution of catalytic active sites through Ru to Co electron transfer. H 2 -TPR/TPD confirmed that Ru, as a hydrogen spillover site, significantly enhanced low-temperature reducibility and hydrogen adsorption capacity. DFT calculations indicated that Ru sites dominated the efficient dissociation and activation of H₂ molecules, while Co sites were responsible for the selective adsorption of substrate molecules. The synergistic effect between the two metals greatly improved the HDO activity of the catalyst. The optimized 0.009RuCo@NC-400 catalyst achieved 100% conversion of lignin oil at 240 °C and 2 MPa H₂, with a cycloalkane selectivity of 73.7%. Moreover, the conversions of ten lignin derivatives were all above 97%. This study reveals a synergistic catalytic mechanism of the 0.009RuCo@NC-400 catalyst, integrating crystalline phase structure, electronic effects, and hydrogen spillover, providing theoretical guidance for the design of efficient HDO catalysts.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 7
·1-14
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IF 2.4
Ren Xiaohong,Bao Zien,Wang Yong,Yu Xiaoqiang,Rong Zeming
To address the low hydrogenolysis efficiency of 4-O-5 bonds in lignin catalytic conversion, Ni-Pt/HZSM-5 bimetallic catalyst with a Ni/Pt molar ratio of 47:1 was developed using diphenyl ether (DPE) as a model compound. The results revealed that electron transfer from Ni to Pt induced a positive charge on the Ni surface, significantly enhancing its adsorption and activation capacity toward electron-rich 4-O-5 bonds. At 100 °C and 5 bar H 2 , the conversion of DPE reached 90.3% with 93.1% selectivity (phenol and benzene) and Ni-Pt/HZSM-5 retained stable over five cycles of use. When Ni-Pt/HZSM-5 was applied to pine sulfate lignin depolymerization at 220 °C and 5 bar H 2 , with yields of 12.9 wt% for phenol and 4-propylphenol and 16.3 wt% for methoxy phenolic compounds. Overall, this study would promote the application and development of high-efficiency bimetallic catalysts for the production of valuable chemicals from biomass. Graphical
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高影响因子
BMEMat
·
2025
·
IF 15.5
Wenkui Mo,Zeyu Liang,Bo Zhang,Lin Xiao,Xun Liu,Zhigao Yi,Shangzhi Xie,Qiyue Wang,Liang Shi,Taobo Luo,Feng Li,Leilei Wu,Yuanzhe Piao,Fangyuan Li,Jian Zeng,Daishun Ling
Early, non-invasive detection of esophageal cancer at sub-millimeter resolution is critical for tailoring precise therapeutic strategies. While ultra-high-field (UHF) magnetic resonance imaging (MRI) offers exceptional spatial resolution, the lack of optimized contrast agents capable of enhancing sensitivity for detecting microscopic tumors remains a significant challenge. Here, we report a cyclo-RGD peptide-conjugated antiferromagnetic nanoparticle (RANP) as a novel targeted T 1 contrast agent, specifically designed to improve in vivo imaging of esophageal tumors at the micrometer scale. The RANP integrates an antiferromagnetic core with low magnetization, minimizing T 2 decaying effects, while the cyclo-RGD peptide enhances its targeting ability by specifically binding to integrin α v β 3 , a biomarker highly expressed on tumor vasculature. This targeted conjugation improves the probe's selective accumulation at the tumor site and facilitates superior T 1 relaxation of water protons. Under 9 T MRI conditions, the RANP exhibits an r 1 value of 1.88 mM −1 s −1 and a low r 2/ r 1 ratio of 1.84, enabling the detection of primary esophageal tumors as small as 0.8 mm. This study significantly advances the sensitivity of current imaging techniques, pushing the detection limit of in vivo esophageal cancer diagnosis into the sub-millimeter range. Our results demonstrate the promising potential of RANP-enhanced UHF MRI for early detection, monitoring, and therapeutic intervention in esophageal cancer, offering a powerful tool for more effective clinical management.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Boyu Chen,Jinghao He,Qingqing Wang,Jianjun Wang,Piaoping Yang
A multifunctional nanozyme-based reactor (FDIG) was rationally constructed by integrating Fe 3 O 4 nanoparticles, Ir nanoparticles, and glucose oxidase (GOx) within the spatially confined framework of dendritic mesoporous silica nanoparticles (DMSN). The DMSN scaffold provides abundant mesochannels and silanol groups for the uniform co-immobilization of catalytic components, enabling efficient oxidase–peroxidase cascade catalysis through a proximity-driven mechanism. In this confined architecture, GOx catalyzes glucose oxidation to produce H 2 O 2 , which is subsequently decomposed by Fe 3 O 4 /Ir nanozymes to generate hydroxyl radicals ( OH) for TMB oxidation, leading to a strong blue colorimetric response. Benefiting from the synergistic interaction between Fe 3 O 4 and Ir and the spatial confinement effect of DMSN, the FDIG nanoreactor exhibits remarkably enhanced peroxidase-like activity, high substrate affinity, and excellent structural robustness. Through a simple one-step detection, the optimized FDIG system demonstrated outstanding glucose-sensing performance with a wide linear range (50–1000 μM), a low detection limit (0.34 μM), and excellent selectivity. Besides, FDIG can be easily separated and reused due to the magnetic Fe 3 O 4 nanoparticles, maintaining over 80% activity after five cycles. The sensor also showed reliable analytical performance in artificial saliva, achieving recovery rates of 95–96% with RSDs below 3.2%, confirming its applicability in complex biological environments. Moreover, the colorimetric response could be quantitatively analyzed via an RGB-based smartphone platform, allowing rapid and instrument-free glucose monitoring, thus demonstrating the potential of FDIG for noninvasive point-of-care testing.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Longyun Liu,Xiaohui Li,Jiejun Ren,Liangjun Chen,Si Chen,Guoping Yan,Fan Liu,Jun Huang
Lead halide perovskite quantum dots (PQDs) exhibit outstanding optical properties, including high photoluminescence quantum yield, narrow emission bandwidth, and tunable emission wavelengths. However, structural instability and susceptibility to degradation in aqueous environments significantly limit their applicability in biological imaging systems. Therefore, the development of PQD-based imaging platforms with excellent optical performance and enhanced aqueous stability remains a critical challenge. Herein, a water-dispersible nanocomposite nanoimaging platform CsPbBr3–Fe3O4@SA@DSPE-mPEG (CPB–Fe@SA@DSPE) was successfully synthesized by employing stearic acid (SA) as a hydrophobic shell and amphiphilic molecule DSPE-mPEG as a hydrophilic layer, enabling dual-modal fluorescence and magnetic resonance imaging (MRI) for tumor diagnostics. This platform demonstrates remarkable water dispersibility and stability, retaining 42.8% of its initial fluorescence intensity after 37 days in an aqueous medium. In addition, it exhibits superparamagnetic behavior with a saturation magnetization of 0.96 emu/g. In vitro experiments further confirmed its dual-mode imaging capability in tumor models, underscoring its potential in precision diagnostics. Therefore, this study provides a promising strategy to overcome the intrinsic limitation of PQDs in biomedical imaging and broadens the scope of PQD-based applications.
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