ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Yiqing Liu,Hong Hu,Ting Wang,Chuanzeng Chen,Linghan Xu
Usually, Cu(II) cannot effectively activate peracetic acid (PAA), but it was observed that the high concentration of Cl - in Cu(II)/PAA process could notably promote the decoloration of rhodamine B (RhB) in the preliminary experiment. Therefore, the mechanism on the enhanced effect of Cl - in Cu(II)/PAA process for RhB decoloration was investigated in detail in this work. With the addition of Cl - in Cu(II)/PAA process, it could rapidly combine with Cu(II) to produce highly active Cu(II)-Cl n complexes, which could promote the Cu(II) reduction to Cu(I) and subsequent PAA activation. At pH 8.5, the RhB decoloration efficiency in Cl - /Cu(II)/PAA process could reach 85.8 %, and CH 3 C(O)OO • and CH 3 C(O)O • mainly contributed to the decoloration of RhB in this condition. However, at pH 4.0, reactive chlorine species were considered to be responsible for RhB decoloration in this process. The increase of Cu(II), PAA and Cl - dosage facilitated the RhB decoloration in Cl - /Cu(II)/PAA process, while the excessive Cl - inhibited RhB decoloration. HCO 3 - showed an apparent improvement effect on RhB decoloration, while fulvic acid (FA) obviously suppressed RhB decoloration. This work provides a deep insight on the facilitation effect of Cl - in Cu(II)/PAA process and a strategy to broaden PAA catalysis via Cu(II).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 16
·12364-12371
·
IF 4.6
Chang Man,Chunpeng Xu,Jinfeng Wang,Xiangli Li,Tong Li,Yanhua Ma,Shalu Zhang,Yongfeng Qiao,Qiong Wu
Organic–inorganic hybrid materials have significant potential in the photocatalytic degradation of Rhodamine B (RhB). In this study, five hybrid materials were successfully synthesized by modifying silicotungstic acid (H4SiW12O40, abbreviated SiW12O40) with diverse MnL [L = Salen(L1), 5-Br-Salen(L2), 5-Cl-Salen(L3), 3-Me-Salen(L4), di-tBu-Salen(L5)] complexes, specifically derivatives featuring various substituents. All the compounds are characterized by IR spectra, elemental analyses and thermogravimetric analyses (TGA). The band gaps of 1.33–1.52 eV and energy bands are obtained through the measurement of UV-Vis DRS and Mott–Schottky. Photocatalytic experiments of (MnL1)4SiW12O40 (compound 1), (MnL2)4SiW12O40 (compound 2), (MnL3)4SiW12O40 (compound 3), (MnL4)4SiW12O40 (compound 4) and (MnL5)4SiW12O40 (compound 5) indicate that compound 2 catalyst exhibits the best photocatalytic properties (RhB degrades to 6% during 70 min) while all of them possess catalytic activity for photodegradation of RhB under UV irradiation. Free radical trapping experiments show that the addition of PBQ (·O2− trapping agents) makes the RhB residual ratio increase from 6% to 60% and indicates that ·O2− is playing a pivotal role. A possible mechanism of RhB photodegradation in the presence of compound 2 is proposed based on free radical trapping experiments and the energy bands. Future work could focus on fine-tuning the molecular architecture through strategic modification of the organic ligands and precise control of the metal-to-POM ratio, potentially leading to optimized electronic structures and enhanced charge transfer kinetics for superior photocatalytic performance in environmental applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Fei Miao,Zehao Liu,Xin Kang,Cheng Cheng,Xiaoyu Mao,Ruimeng Li,Heng Lin,Hui Zhang
Heterogeneous catalytic oxidation based on iron species for peroxymonosulfate (PMS) activation is considered as one of the most attractive strategies for wastewater treatment. However, the rate-limiting regeneration of Fe(II) from Fe(III) heavily hampers the efficient activation of PMS. In this study, the introduction of electric field to the Fe-supported bentonite (Fe-B) activated PMS process was proposed to enhance the Fe(III)/Fe(II) redox cycle. The Fe-B catalyst performed well in the removal of Acid Orange 7 (AO7) through the synergistic effect of electrolysis and the continuous redox cycle of Fe(III)/Fe(II) for PMS activation. The use of 0.5 g L −1 Fe-B catalyst and 10 mM PMS yielded nearly complete removal of the AO7 (50 mg L −1 ) in 60 min at 2 mA cm −2 of current density. Based on the results of electron paramagnetic resonance (EPR) spectroscopy, chemical quenching tests, X-ray photoelectron spectroscopy (XPS) analysis, and electrochemical measurements, the decolorization of AO7 was dominantly attributed to surface-bound radicals (SO 4 •− ads and • OH ads ) and also the direct electron transfer at DSA anode. Moreover, the electro/Fe-B/PMS system showed an effective pH range from 2.6 to 9.0 and the abatement of AO7 was slightly affected in the presence of natural background anions. This work provides a feasible strategy of PMS activation by cost-effective Fe-B catalyst coupling with electric field and gives an insight into the accelerated oxidation of recalcitrant pollutants.
✓ 已验证
DOI
高影响因子
Soft Matter
·
2018
·Vol. 14
·期 35
·7107-7112
·
IF 3.709
Ting Qu,Song Guan,Chen Zhang,Xiaoxiong Zheng,Yongbin Zhao,Aihua Chen
Block copolymer (BCP) films with perpendicularly aligned cylindrical domains of high aspect ratio have important applications in diverse fields. However, an aspect ratio of the cylinders as high as 200 has rarely been reported so far. Here we demonstrate an efficient route to the formation of normally aligned P4VP cylinders with high aspect ratio surrounded by a matrix of azobenzene-containing block (PMA(Az)) via hierarchical self-assembly. A crisscross structure, consisting of parallelly aligned liquid crystalline (LC) layers and normally aligned self-assembly domains, is expected to assist the formation of well-defined nanostructures. The LC layers in the cylindrical films self-assemble to form smectic phase after solvent annealing, as confirmed by WAXD and UV-vis spectra. We found that the aspect ratio of the vertical P4VP cylinders is up to 200 and the film thickness reaches 6 μm. P4VP is a functional polymer, making this P4VP-b-PMA(Az) film more suitable for advanced filters, multi-nanochannels, nanolithography, and high-density storage media, etc.
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Yujie Li,Yixing Wang,Zhenying Liu,Luyao Jiang,Hu Yang,Zhenliang Xu
Molecular separation of dye mixtures containing the same charge remains a challenge. In the present study, we prepared a composite membrane that could efficiently separate anionic dye mixtures. Briefly, Al-Metal-organic framework (Al-MOF) nanoparticles synthesized by the ion-exchange method were used as fillers during the in-situ synthesis of ethanolamine (ETA) grafted polyacrylonitrile (PAN) membrane. The optimized composite membrane showed a high rejection of congo red (CR) from a single solution (96% rejection) and the CR/methyl orange (MO) mixture (93%/18%) solution. The flux of dye mixture solution reached 180 L m −2 h −1 , higher than many reports in the literature. The further modification on pore size (heat treatment) or surface charge (hydrolysis treatment) improved the membrane performance to separate smaller dye mixture of methyl blue (MB)/MO. Both modified membranes showed a good MB rejection (93%) and flux of 70–85 L m −2 h −1 . While for the separation of the MB/MO mixture, the heat-treated membrane showed the lowest flux and a middling rejection. The surface hydrolyzed membrane showed a better selectivity (96% MB/32% MO) and a higher flux (127 L m −2 h −1 ) than that of the entirety hydrolyzed membrane (93% MB/58% MO and flux of 78 L m −2 h −1 ), which was attributed to their different charge distribution.
✓ 已验证
DOI
高影响因子
BIOORGANIC CHEMISTRY
·
2020
·
IF 4.831
Yuan Yu,Wei-Fan Lu,Zeng-Jie Yang,Na Wang,Xiao-Qi Yu
A novel strategy combining visible-light and enzyme catalysis in one pot for the synthesis of 4H -pyrimido[2,1- b ] benzothiazole derivatives from alcohols is described for the first time. Fourteen 4H -pyrimido[2,1- b ] benzothiazole derivatives were prepared with yields of up to 98% under mild reaction conditions by a simple operation. The photoorgano catalyst rose Bengal (rB) was employed to oxyfunctionalise alcohols to aldehydes. Compared with aldehydes, alcohols with more stable properties and lower cost, thus we used photocatalysis to oxidize alcohols into aldehydes. Next, the enzyme was used to further catalyze the reaction of Biginelli to produce the target product of 4H -pyrimidine [2,1- b ] benzothiazole. Experimental results show that this method provides a more efficient and eco-friendly strategy for the synthesis of 4H -pyrimido[2,1- b ] benzothiazole derivatives.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Yang Lyu,Hui Tang,Guangdong Zhao
Polymer-derived ceramics (PDCs), such as silicon oxycarbide and its derivatives, show an exceptional high oxidative stability under extreme conditions. A novel multicomponent silicon oxycarbide system tailoring with transition metal (hafnium) and boron is fabricated by sol-gel and solvothermal method. Amorphous SiHBOC was formed via the condensation of Si–OH, B–OH and Hf–OH groups, respectively, and the bonds of Si–O–Hf and Si–O–B– were detected by FTIR and XPS characterization. After high-temperature pyrolysis, the precursor is converted to a rigid ceramic material that has an 85.8 wt % ceramic yield of SiHfBOC. We investigate the oxidation resistance performance of SiHfBOC using the isothermal oxidation test at 1400 °C. The results showed that the oxidative stability of SiHfBOC was significantly superior to than those of SiBOC ceramic.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Liping Man,Quanlong Xu,Wenhao Li,Wei Chen,Weiwei Zheng,De-Kun Ma
Oxygen vacancies (OVs) can adjust surface and electronic structures of materials and behave as active sites, extend spectral responsive range, and promote the transfer and separation of photogenerated carriers. Therefore surface properties and photocatalytic activities of materials can be enhanced via the incorporation of OVs . However, the influences of OV concentration inside a material on its adsorption ability for heavy metal ions associated with surface and photocatalytic activities under different atmospheres are still unexplored. In this work, in order to obtain highly efficient adsorbents and photocatalysts, rose-like Bi 2 O 2 CO 3 hierarchical microspheres with rich OVs (Bi 2 O 2 CO 3 -ROVs) and deficient OVs (Bi 2 O 2 CO 3 -DOVs) were synthesized through a facile hydrothermal route and H 2 O 2 oxidation treatment, respectively. Bi 2 O 2 CO 3 -ROVs hierarchical microspheres showed 2.4-times larger adsorption capacity than Bi 2 O 2 CO 3 -DOVs counterparts. The former also showed significantly enhanced photocatalytic activity for Rodamine B (RhB) degradation in aqueous solution under air, N 2 , and Ar atmospheres than the latter, especially under anaerobic conditions. Our work demonstrated that OV engineering could provide a new strategy for enhancing adsorption capability and photocatalytic activity under both aerobic and anaerobic conditions of materials.
✓ 已验证
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 10
·735
·
IF 3.8
Lu Qiu,Hanliang Li,Wenyi Xu,Rongshu Zhu,Feng Ouyang
The organic pollutants discharged from industrial wastewater have caused serious harm to human health. The efficient photocatalytic degradation of organic pollutants under sunlight shows promise for industrial applications and energy utilization. In this study, a modified TiO2photocatalyst doped with bismuth (Bi) and fluorine (F) and composited with SnO2and SiO2was prepared, and its performance for the degradation of Rhodamine B (RhB) under simulated sunlight was evaluated. Through the optimization of the doping levels of Bi and F, as well as the ratio of SnO2and SiO2to TiO2, the optimal catalyst reached degradation efficiency of 100% for RhB within 20 min under simulated sunlight, with a first-order reaction rate constant of 0.291 min−1. This value was 15, 41, 6.5, and 3.3 times higher than those of TiO2/SnO2, Bi/TiO2, Bi-TiO2/SnO2, and F/Bi-TiO2/SnO2, respectively. The active species detection showed that h+was the most crucial active species in the process. The role of Bi and F addition and SnO2-SiO2compositing was investigated by characterization. Bi formed a chemical bonding with TiO2by doping into TiO2. The absorbance intensity in the UV and visible light regions was improved by SnO2and F modification. Composite with SiO2led to a larger surface area that allowed for more RhB adsorption sites. These beneficial modifications greatly enhanced the photocatalytic activity of the catalyst.
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2024
·
IF 2.3
Qingxia Guan,Yumeng Liu,Zhaorui Xia,Yue Zhang,Liping Wang,Yanhong Wang,Shujun Zou,Shaowa Lv,Xiaoying Zhou
Background: Glycyrrhetinic acid-mediated brucine self-assembled nanomicelles enhance the anti-hepatitis B properties of brucine by improving its water solubility, short half-life, toxicity, and side effects. Brucine (B) is an indole alkaloid extracted from the seeds of Strychnos nux-vomica (Loganiaceae). Purpose: To assess the efficacy of the Brucine-Glycyrrhetnic acid-Polyethylene glycol-3,3’-dithiodipropionic acid-Glycerin monostearate (B-GPSG) in treating hepatitis B, its potential to protect against acute liver injury caused by d-galactosamine and its anti-hepatoma activities were studied. Research Design: The concentration of B-GPSG used in the in vivo and in vitro experiments was 0.63 mg/mL. The rats injected with d-GalN (450 mg/kg) were used as liver injury models. The rats were separated into normal, model, positive, positive control, B-PSG and B-GPSG groups. Hepatoma cells expressing HBV HepG2.2.15 were used for in vitro experiments. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, plate cloning, Hoechst staining and flow cytometry were conducted to explore the mechanism of B-GPSG against hepatitis B. Results: Compared with the model group, the liver coefficient of B-GPSG group decreased (4.59 ± 0.17 vs 5.88 ± 0.42), the content of MDA in rat liver homogenate decreased (12.54 ± 1.81 vs 23.05 ± 2.98), the activity of SOD increased, the activity of ALT and AST in rat serum decreased. In vitro, the IC50 values of B-GPSG group decreased. B-GPSG group effectively inhibited the proliferation and migration of HepG2.2.15 cells. Conclusions: The hepatoprotective effects of B-GPSG nanomicelles, which are attributed to their GA-mediated liver targeting and synergistic actions with brucine, suggest their therapeutic potential against hepatitis B. This development opens up new possibilities for the application of traditional Chinese medicine and nanomedicine in anti-hepatitis B.
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Junlong Niu,Shuai Chen,Wenna Zhang,Wenwen Zhang,Keke Chai,Guo Ye,Danqin Li,Weiqiang Zhou,Xuemin Duan,Jingkun Xu
Nanowire poly (3,4-dihydro-2 H -thieno [3,4- b ] [1,4]dioxepin-3-yl)methanol (PProDTM) free-supporting films with conductivities around 1.92 S cm −1 were prepared using a template-free electropolymerization method. The structure, morphology, mechanical properties, and thermal stability of the PProDTM films were characterized by Fourier transform infrared spectroscopy, UV–vis spectroscopy, scanning electron microscopy, dynamic mechanical analysis and thermogravimetric analysis . Moreover, the capacitance performances of PProDTM films were investigated in aqueous and organic electrolytes (acetonitrile (ACN) and dichloromethane (DCM)). In 0.1 M H 2 SO 4 , a symmetrical supercapacitor based on PProDTM exhibited specific capacitance of 89.2 F g −1 at a current density of 1.0 A g −1 , an energy density of 3.1 Wh kg −1 at power density of 0.5 kW kg −1 and the cycling capacitance retention was 74.8% after 5000 cycles. As the scan rate and current density increased, the specific capacitance of PProDTM films clearly decreased in DCM, but no obvious changes occurred in water and ACN. In ACN containing 0.1 M Bu 4 NBF 4 , a symmetrical supercapacitor based on PProDTM exhibited specific capacitance of 99.6 F g −1 at a current density of 1.0 A g −1 , an energy density of 3.5 Wh kg −1 at power density of 0.5 kW kg −1 and the cycling capacitance retention was 82.2% after 5000 cycles. These results imply that our flexible free-supporting PProDTM films are promising for future use in supercapacitors .
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wei Gao,Yang Liu,Hao Zhou,Yongming Bao,Jingjing Zhan
Recycling the wasted lithium-ion batteries for environmental catalysis is promising to control pollution since the electrode materials usually contain metal oxides showing good catalytic activities. Herein, the LiCoO 2 was synthesized and used to treat the simulated dye wastewater. In order to cope with the practical water pollution, the effects of rhodamine B (RhB) concentration, concomitant ions, solution pH, air blowing and reaction temperature were systematically investigated. The most important finding of this study is the in situ nitrogenization of the LiCoO 2 via RhB degradation, which offered the reused material a much better activity than the fresh one due to the formation of more defect oxygen species, and the activity of the reused LiCoO 2 became better and better with cycling runs. At the third time of usage, ~90% of RhB could be removed under the conditions of 0.2 g of catalyst, 50 mL of 5 mg·L −1 RhB solution and 30 °C whereas only ~60% of RhB was degraded over the fresh sample. The results of this study will also have scientific significance for the development of nitrogen-doped LiCoO 2 in other application fields.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）