CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lehui Ren,Mei Chen,Jinxing Ma,Yang Li,Zhiwei Wang
In this study, a novel reactive electrochemical membrane (REM) made of Pd-loaded porous Ti was prepared to achieve ultrafast and efficient oxidation of trace antibiotics sulfamethoxazole (SMX) under anodic polarization. At a current density of 0.5 mA/cm 2 , the percentage removal of SMX by the REM was 96.3% in flow-through mode, with the energy cost ( i.e. , the electrical energy per order of removal, 1.34 Wh/m 3 ) being much lower than the flow-by mode (125.76 Wh/m 3 ) under the same operating condition. Quenching experiments and electron spin resonance spectra demonstrated that singlet oxygen ( 1 O 2 ) was the main reactive oxygen species in the REM system, playing a vital role in SMX degradation. Results of this study indicated that 1 O 2 was mainly generated on the anode via Pd–O 2 interaction that directly activated oxygen, rather than the evolution of 1 O 2 precursors ( e.g ., O 2 − and H 2 O 2 ). The constantly high electrochemical removal of SMX (88.5–91.9%) from actual surface water demonstrated that the matrix effect on the process performance was minimal in realistic applications, highlighting this novel REM to be a viable way to remove trace organic contaminants from surface water.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jingfeng Li,Zhaoyi An,Junyang Sun,Chunyan Tan,Dan Gao,Ying Tan,Yuyang Jiang
A cationic conjugated polyelectrolyte PPET3-N2 was used as a photosensitizer for photocatalytic oxidation of organic sulfides, including thioanisole, ethyl phenyl sulfide, 4-methylphenyl methyl sulfide, etc., to form sulfoxides with good yields and high selectivity. Oxidation reactions were performed in both batch and microfluidic reactors, where the microfluidic reactor can significantly promote the conversion of photocatalytic oxidation reaction to over 98% in about 8 min. Further studies of the photocatalytic oxidation of the antitumor drug ricobendazole in the microfluidic reactor demonstrate the potential application of the polymer material in organic reactions given its high selectivity, good efficiency, and operation convenience.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TOPICS IN CATALYSIS
·
2024
·
IF 2.8
Gao Ya,Fang Yarong,Wang Weiwei,Nie Guangze
The application of Co 3 O 4 in activated PMS degradation of organic pollutants has been widely concerned. Due to the limited catalytic performance of pure cobalt catalyst, a novel Cu-Co nanocomposite catalyst was synthesized in this paper for activating PMS to degrade tetracycline (TC). After a small amount of copper was introduced, Cu-Co nanocomposite displayed significant heterogeneous catalytic activity in the activation of PMS. Efficient and rapid degradation of TC was achieved under various pH conditions in the Cu-Co nanocomposite/PMS catalytic system. The generation of a large number of singlet oxygen ( 1 O 2 ) is the dominant factor in TC degradation. This study improved the practicality of the PMS activation system across various environmental conditions. Cu-Co nanocomposites exhibit exceptional catalytic properties, rendering them promising catalysts for practical applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2024
·
IF 2.3
Yang Sheng,Danni Qing,Naijun Li,Peng Zhang,Yixin Sun,Rong Zhang
Zn-Ag-In-S (ZAIS) quantum dots (QDs) were synthesized with various Ag-to-In ratios and used as novel photosensitizers for photodynamic therapy (PDT) on cancer cell inhibition and bacterial sterilization, and their structural, optical, and photodynamic properties were investigated. The alloyed QDs displayed a photoluminescence quantum yield of 72% with a long fluorescence lifetime of 5.3 μs when the Ag-to-In ratio was 1:3, suggesting a good opportunity as a dual functional platform for fluorescence imaging and PDT. The ZAIS QDs were then coated with amphiphilic brush copolymer poly(maleic anhydride-alt-1-octadecene) (PMAO) before application. The 1O2 quantum yield of the ZAIS/PMAO was measured to be 8%, which was higher than previously reported CdSe QDs and comparable to some organic photosensitizers. Moreover, the ZAIS QDs showed excellent stability in aqueous and biological media, unlike organic photosensitizers that tend to degrade over time. The in vitro PDT against human melanoma cell line (A2058) and Staphylococcus aureus shows about 30% inhibition rate upon 20 min light irradiation. Cell staining images clearly demonstrated that co-treatment with ZAIS QDs and light irradiation effectively killed A2058 cells, demonstrating the potential of ZAIS QDs as novel and versatile photosensitizers for PDT in cancer and bacterial treatment, and provides useful information for future designing of QD-based photosensitizers.
研究领域:
生物医学工程
·
材料科学
·
肿瘤学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Wentao Zhang,Kunrui Wei,Wenguang Huang,Jianghua Yang,Yonghai Gan,Shujuan Zhang
Post-synthetic modification with β -diketone has been proven as an effective strategy to improve the visible light response activities of metal-organic frameworks (MOFs). Nevertheless, the effects of the anchored-diketones on the excitonic behaviors and photocatalytic mechanisms of MOFs are still unclear. Herein, two MOFs (MIL-101 with Cr III and MIL-101 with Al III ) were employed as prototypical materials to further understand this post-synthetic modification strategy. Diketone anchoring could enhance the photocatalytic generation of singlet oxygen ( 1 O 2 ) by the two MOFs in a joint mechanism: exciton-mediated energy transfer and photosensitization. Diketone anchoring induced triplet exciton was found playing an important role in the photocatalytic generation of 1 O 2 . The photosensitization of the anchored-diketone also played a key role in the photocatalytic generation of 1 O 2 . The results here provide a useful guidance for the development of MOFs-based photocatalysts and are helpful to realize the regulation of excitonic behaviors and photocatalytic mechanisms of MOFs.
研究领域:
材料科学
·
光化学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Weijuan Zhang,Hui Lin,Yousef Faraj,Ruzhen Xie
Electrochemical persulfate activation (E-PS) has recently emerged as a highly effective advanced oxidation process in water decontamination . However, the presence of chloride ions (Cl − ) in waters can accelerate anodic corrosion as well as lead to the formation of toxic chlorinated byproducts (i.e., ClO 4 − ), limiting its practical application. In this study, we introduce a novel Nd/Bi@SnO 2 anode to construct E-PS, which exhibits high stability in chloride-containing water with a long-expected service lifetime of 13.7 years. The Nd/Bi@SnO 2 electrode can effectively convert Cl − to reactive chlorine with the assistance of PMS , triggering singlet oxygen ( 1 O 2 ) generation for superior organic removal while avoiding toxic chlorinated byproducts (i.e., ClO 4 − ) generation as well as greatly reducing the energy consumption. Comprehensive structural and electrochemical characterization results demonstrate Nd/Bi co-doping introduces oxygen vacancy on Nd/Bi@SnO 2 , enabling the anode with high oxygen evolution potential , excellent conductivity and superior stability. Scavenging experiments and electron paramagnetic resonance illustrate the generation of various reactive species in the system, among which 1 O 2 predominantly contributes to organic removal and results in harmless intermediates. This innovative approach transforms Cl − into ROSs for eco-friendly, energy-efficient water decontamination.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Cijun Shuai,Gao Pan,Tiantian He,Xiong Shuai,Ping Wu,Qi Zhong
Artesunate, as a semi-synthetic artemisinin derivative, exhibits a broad-spectrum bactericidal effect via the release of singlet oxygen. However, its release is slow due to the difficulty breaking the endoperoxide bridge bond. Ammoniated graphene oxide could be electrostatic adsorbed with artesunate and efficiently transfer thermal energy to artesunate by interfacial heat transfer, thereby facilitating the breaking of the endoperoxide bridge bond. In detail, artesunate was anchored on graphene oxide by a one-pot hydrothermal synthesis method and introduced to the PLLA scaffold fabricated by selective laser sintering. Under near-infrared light irradiation, graphene oxide could convert light to heat through photothermal conversion. Then the heat energy was transferred to artesunate by interfacial heat transfer, accelerating the release of singlet oxygen. Meanwhile, graphene oxide could achieve the purpose of thermal ablation for bacterial infection by increasing the local temperature. Based on the combination of singlet oxygen and thermal ablation therapy, the scaffold possesses a high bactericidal ability triggered by near-infrared light. Under the near-infrared light irradiation, the singlet oxygen production from artesunate increased by 39 %, and the antibacterial ratio against S. aureus and E. coli reached 91.6 % and 93.3 %, respectively. Additionally, the scaffold was favorable cytocompatibility with mBMSCs. All the results highlight the great potential of artesunate-mediated graphene oxide scaffold in eliminating bacterial infections.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
药学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Gu Chao-Hai,Wang Song,Zhang Ai-Yong,Liu Chang,Jiang Jun,Yu Han-Qing
Developing eco-friendly catalysts for effective water purification with minimal oxidant use is imperative. Herein, we present a metal-free and nitrogen/fluorine dual-site catalyst, enhancing the selectivity and utilization of singlet oxygen ( 1 O 2 ) for water decontamination. Advanced theoretical simulations reveal that synergistic fluorine-nitrogen interactions modulate electron distribution and polarization, creating asymmetric surface electron configurations and electron-deficient nitrogen vacancies. These properties trigger the selective generation of 1 O 2 from peroxymonosulfate (PMS) and improve the utilization of neighboring reactive oxygen species, facilitated by contaminant enrichment at the fluorine-carbon Lewis-acid adsorption sites. Utilizing these insights, we synthesize the catalyst through montmorillonite (MMT)-assisted pyrolysis (NFC/M). This method leverages the role of MMT as an in-situ layer-stacked template, enabling controlled decomposition of carbon, nitrogen, and fluorine precursors and resulting in a catalyst with enhanced structural adaptability, reactive site accessibility, and mass-transfer capacity. The NFC/M demonstrates an impressive 290.5-fold increase in phenol degradation efficiency than the single-site analogs, outperforming most of metal-based catalysts. This work not only underscores the potential of precise electronic and structural manipulations in catalyst design but also advances the development of efficient and sustainable solutions for water purification.
研究领域:
催化
·
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Lingzhen Miao,Siqi Luo,Ziru Liang,Ming Lu,Pengcheng Wang
The treatment of wastewater laden with energetic compounds, particularly 2,2′,4,4′,6,6′-hexanitrostilbene (HNS), remains highly challenging owing to the environmental persistence and inherent toxicity of nitroaromatic derivatives. Herein, we reported a CoFe 2 O 4 /PMS system for the first-time efficient degradation of HNS. The CoFe 2 O 4 /PMS process afforded 96.3% removal of HNS within 150 min, together with 89.3% chemical oxygen demand (COD) removal and 49.5% total organic carbon (TOC) removal, indicating substantial deep oxidation and partial mineralization. Mechanistic studies combining quenching experiments, EPR spectroscopy, electrochemical analysis, and DFT calculations disclosed a synergistic radical/non-radical pathway dominated by 1 O 2 , with Fe incorporation enhancing PMS adsorption, charge transfer, and catalytic activation. HPLC-MS revealed degradation intermediates and supported three plausible degradation pathways, whereas QSAR analysis indicated progressive detoxification during oxidation. The catalyst further exhibited excellent stability, negligible metal leaching, and broad applicability toward actual HNS production wastewater and other energetic organic pollutants. These findings identify CoFe 2 O 4 /PMS as a promising platform for the efficient remediation of hazardous energetic compound wastewater.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Shuai Xiao,Tong Wei,Menglan Xu,Tongtong Yu,Wei Wang,Hao Fang,Shi-Wen Lv
Herein, a novel CeO 2 -supported CuO composite (denoted as CuO/CeO 2 ) is rationally designed and synthesized via a facile strategy for peroxymonosulfate (PMS) activation to degrade fluorinated antibiotic (namely florfenicol). Benefiting from the synergistic effects between CeO 2 and CuO, abundant Ce 3+ /Ce 4+ and Cu + /Cu 2+ redox couples and oxygen vacancies are formed in the composite, which can significantly accelerate interfacial charge transfer and provide sufficient active sites. The optimized CuO/CeO 2 catalyst shows exceptional catalytic performance, achieving 95.9% removal efficiency of florfenicol within 16 min, together with excellent pH adaptability, anti-interference capacity, and reusability. The mechanistic analysis reveals that PMS is firstly adsorbed on the CuO/CeO 2 surface to form CuO/CeO 2 -PMS* complexes, which then undergoes disproportionation to produce 1 O 2 . Meanwhile, O 2 •– can also transform PMS into SO 5 •‒ , which further decomposes into 1 O 2 . The nonradical pathway dominated by 1 O 2 is responsible for the degradation of florfenicol, whereas radical species and high-valent copper contribute minimally. All in all, this work provides a high-efficiency strategy for selective 1 O 2 generation in advanced oxidation processes, offering a promising approach for fluorinated antibiotic wastewater remediation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jie Wang,Haibao Liu,Defang Ma,Yan Wang,Guangping Yao,Qinyan Yue,Baoyu Gao,Shue Wang,Xing Xu
In this work, the combined ultraviolet ozone process (UV/O 3 ) was applied for organic contaminant (Reactive Blue K-GL, RB) degradation in high salinity . The degradation rates of RB in both O 3 and UV/O 3 systems were enhanced by NaCl (the k increased from 0.080 to 0.116 to 0.132 and 0.267 min −1 respectively), while mineralization rate varied at different salt conditions. In addition, UV irradiation promoted the degradation efficiency of RB with the presence of salt. Singlet oxygen ( 1 O 2 ) was the primary active species in the UV/O 3 system. The quenching experiments and signal intensity of 1 O 2 corresponded well to the mineralization of RB. Under conditions of high salinity and high pH, O 3 has high mass transfer coefficient (k La , 3.303 min −1 ) and self-decomposition (k d , 0.600 min −1 ), which further promoted the formation of 1 O 2 for mineralization of RB. Furthermore, UV/O 3 system was efficient in real textile wastewater treatment (COD Cr removal rate 91.7% and decolorization rate 98.7%).
研究领域:
环境科学
·
水处理
·
污染物降解
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Shuhong Liu,Zhongping Yao,Yanjing Liu,Jiankang Wang,Xiao Zhang,Ying Song,Wanqian Guo,Xiaohong Wu
Singlet oxygen ( 1 O 2 ) offers unique advantages for contaminant degradation owing to its high oxidative selectivity, long half-life, and pH-independent reactivity. However, the spin-forbidden transition between molecular oxygen (triplet state, 3 O 2 ) and 1 O 2 severely limits their interconversion under energy-free conditions. Herein, we innovatively prepared a nitrogen-doped carbon-coated copper-cobalt alloy catalyst (CuCo@NC) that hierarchically activated molecular oxygen into 1 O 2 . The optimized CuCo@NC600 demonstrated exceptional performance: achieving 96.79 %-98.91 % Norfloxacin (NOR) removal and ∼70 % mineralization within 40 min across a broad pH range of 3–11 under conditions of 1.0 g/L catalyst and 20 mg/L NOR. The catalyst exhibited remarkable versatility, degrading diverse organic pollutants (rhodamine B, tetracycline hydrochloride, etc.) with > 90 % efficiency and strong anti-interference capability against common ions and organic matter. No significant performance degradation was observed in both real wastewater and surface water systems. Radical quenching experiments confirmed 1 O 2 as the dominant reactive species generated through hierarchically activating O 2 by Cu-Co collaboration: molecular oxygen is initially activated at Cu sites, generating •O 2 – and •OH, which are then captured and converted to 1 O 2 at Co sites. The preserved catalytic stability (>70 % efficiency after 3 cycles) originated from the protective carbon matrix and self-compensating Cu + /Cu 2+ –Co 2+ /Co 3+ valence transitions. LC-MS-identified intermediates revealed three detoxification pathways. This work provided an energy-efficient and environmentally friendly strategy for 1 O 2 -dominated advanced oxidation processes, demonstrating significant potential for antibiotic-polluted water remediation.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）