ENVIRONMENTAL RESEARCH
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2024
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IF 7.7
Lu Qin,Peng She,Panlong Si,Suqin Liu,Gaopeng Dai,Cong Pan
Photocatalytic production of H 2 O 2 is indeed a safe, sustainable and cost-effective technology, offering an environmentally friendly solution to the energy crisis through solar photocatalysis. However, it still faces challenges such as reliance on organic electron donors and pure O 2 , as well as inefficiencies in hole utilization. To overcome these limitations, a dual-channel photocatalytic system has been developed. In this study, we showcase the efficiency of the CuO/Cu(OH) 2 @g-C 3 N 4 composite, derived from CuBTC/g-C 3 N 4 via NaOH treatment, as a high-performance dual-channel photocatalyst for H 2 O 2 production. Under visible light (λ ≥ 420 nm), this composite achieves a H 2 O 2 yield of 1354 μmol/L in 120 min without any sacrificial agent, outperforming g-C 3 N 4 by 8.4 times, CuO by 13.6 times and CuO@g-C 3 N 4 by 1.9 times. Quenching experiments and electron paramagnetic resonance spectra confirmed that HO • and O 2 •− are intermediate products in the photocatalytic process, following a two-step single-electron reaction pathway. The superior activity of CuO/Cu(OH) 2 @g-C 3 N 4 in H 2 O 2 generation can be attributed to the synergistic effects of OH bonds on the CuO@g-C 3 N 4 Z-type heterojunction and Cu(OH) 2 . This research presents a straightforward and promising approach for developing highly efficient photocatalysts for energy conversion.
研究领域:
材料科学
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环境科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Dan Han,Huili Liu,Huayan Chen,Xihan Hu,Yue Jia,Chunri Wu,Liang wang
Climate change is one of the major challenges facing the world, and reducing carbon dioxide (CO 2 ) emissions is a crucial means of addressing global warming. Membrane CO 2 absorption technology integrates membrane technology with chemical absorption techniques, offering advantages such as flexible operation, low cost, low energy consumption, and ease of scale-up. The membrane contactor serves to separate the gas and liquid phases. When the membrane pores become wetted, the mass transfer resistance of CO 2 across the membrane increases rapidly. Therefore, improving the anti-wetting properties of the membrane material is fundamental to enhancing its CO 2 absorption capacity. Research findings indicate that through surface roughness analysis, contact angle measurements, and immersion testing, the composite PVDF membrane fabricated via in-situ growth of CuBTC and PFOTES modification exhibited superhydrophobic properties with a maximum contact angle of 156.77°. After 60 h of continuous operation, the CO 2 mass transfer rate of the composite membrane only decreased by 5.6 %, which is significantly lower than the 27.7 % decrease of the pristine PVDF membrane, demonstrating superior operational stability and anti-wetting properties. Meanwhile, under the optimal condition of 15 modification cycles, the CO 2 removal efficiency and mass transfer rate of the composite membrane were higher than those of the pristine membrane, achieving improved mass transfer performance.
研究领域:
环境科学
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材料科学
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化学工程
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碳捕集与封存
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Ziye Chen,Qingyang Cao,Wenwen Xu,Chuanqin Xia
While nuclear power advances as a sustainable low-carbon energy source, it may also contribute to higher emissions of radioactive iodine isotopes, which pose severe health risks and ecological disruptions. This study introduces a sustainable solution for radioactive iodine capture by developing lignin-derived carbon@CuBTC (C@CuBTC) composites. Scanning and Transmission electron microscopes show that lignin-derived carbon (LDC) doping reduces the particle sizes and lattice spacing of the composites. X-ray diffraction and thermogravimetric analyses confirm that LDC incorporation preserves the crystallinity and stability of CuBTC. The optimized 0.2C@CuBTC composite exhibits enhanced iodine adsorption capacity (920 mg/g at 75 °C), marking significant improvement over individual components. It also demonstrates adsorption equilibrium was obtained within four hours and the 0.2C@CuBTC composite has excellent recyclability (< 10% capacity loss after five cycles). Spectroscopic analysis with X-ray photoelectron reveals multiple iodine binding modes, including Cu I coordination, charge transfer, and π-complexation, forming the electrostatic attraction. The doping of LDC with CuBTC frameworks enables the material to achieve outstanding adsorption performance through synergistic physisorption-chemisorption mechanisms. This approach contributes to nuclear waste management by utilizing lignin byproducts, supporting a circular economy. The structure-activity relationship analysis provides a scientific basis for design, optimization, and preparation of high-performance carbon-based CuBTC composite adsorbents for pollution capture.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Mei-Mei Wang,Yun-Ke Cui,Jia-Tai Wen,Yan-Shan Wang,Meng-Hui Jia,Shu-Zhen He,Wei-Kang Wang,Juan Xu
Radical and nonradical dominated persulfate activation processes have pros and cons in the degradation of pollutants. It is challenging to flexibly tune the contribution ratios of radicals and nonradicals in a persulfate activation process for improved pollutant degradation. Herein, we successfully synthesize copper oxide catalysts derived from metal-organic frameworks. By varying the annealing temperature, valence states of copper can be regulated in the catalyst, thereby enabling the switching between radical and nonradical mechanisms for persulfate activation. Copper oxides annealed at 300 °C (CuBTC-300) demonstrate high performance in peroxydisulfate (PDS) activation for the degradation of bisphenol A (BPA), with the synergy of radical and nonradical mechanisms. The surface activated PDS-catalyst complex and OH are identified as the reactive oxidative species involved in this process. On one hand, PDS undergoes a one-electron transfer reaction with Cu(I) sites in Cu 2 O, generating SO 4 − , which subsequently converts into OH for BPA degradation. On the other hand, the combination of PDS molecules with CuO forms surface-activated complexes, depriving electrons from BPA. The increased content of Cu(II) in the catalyst gradually directs PDS activation towards the nonradical pathway. As the annealing temperature increases from 300 °C to 500 °C, the contribution of nonradical oxidation to BPA degradation increases from 58.65 % to 100 %. This work provides new insights into flexibly regulating persulfate activation mechanisms via rational catalysts design.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
DRUG RESISTANCE UPDATES
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2023
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IF 24.3
Zheng Su,Lingtong Kong,Jiawei Mei,Qianming Li,Zhengzheng Qian,Yuanyuan Ma,Yue Chen,Shenghong Ju,Jiaxing Wang,Weitao Jia,Chen Zhu,Wenpei Fan
Bacterial biofilm-associated infection is a life-threatening emergency contributing from drug resistance and immune escape. Herein, a novel non-antibiotic strategy based on the synergy of bionanocatalysts-driven heat-amplified chemodynamic therapy (CDT) and innate immunomodulation is proposed for specific biofilm elimination by the smart design of a biofilm microenvironment (BME)-responsive double-layered metal-organic framework (MOF) bionanocatalysts (MACG) composed of MIL-100 and CuBTC. Once reaching the acidic BME, the acidity-triggered degradation of CuBTC allows the sequential release of glucose oxidase (GOx) and an activable photothermal agent, 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). GOx converts glucose into H 2 O 2 and gluconic acid, which can further acidify the BME to accelerate the CuBTC degradation and GOx/ABTS release. The in vitro and in vivo results show that horseradish peroxidase (HRP)-mimicking MIL-100 in the presence of self-supplied H 2 O 2 can catalyze the oxidation of ABTS into oxABTS to yield a photothermal effect that breaks the biofilm structure via eDNA damage. Simultaneously, the Cu ion released from the degraded CuBTC can deplete glutathione and catalyze the splitting of H 2 O 2 into •OH, which can effectively penetrate the heat-induced loose biofilms and kill sessile bacteria (up to 98.64%), such as E. coli and MRSA. Particularly, MACG-stimulated M1-macrophage polarization suppresses the biofilm regeneration by secreting pro-inflammatory cytokines ( e.g., IL-6, TNF-α, etc. ) and forming a continuous pro-inflammatory microenvironment in peri-implant biofilm infection animals for at least 14 days. Such BME-responsive strategy has the promise to precisely eliminate refractory peri-implant biofilm infections with extremely few adverse effects.
研究领域:
生物医学工程
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纳米技术
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免疫学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）