CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Fazheng Huang,Xinhao Li,Zhen Zhang,Ziqi Jiang,Guoqiang Wang,Lingyun Li,Yan Yu
The exploration of a dual-functional sensor is the key to effectively detect the Cr(VI) and Fe(III) cations in water, which is important to human health and environmental sustainability. Because of the phase stability and excellent luminescence, the rare-earth coordination polymers have great potential as dual-functional sensors. Here, we develop a Y 0.91 Eu 0.09 (H 2 O) 2 {C 6 H 3 (CO 2 ) 3 }(MIL-92(Y):9%Eu 3+ )-based dual-function luminescent sensor on Cr(VI) and Fe(III), which exhibits excellent phase stability and dispersibility in water. The luminescence of MIL-92(Y):9%Eu 3+ aqueous suspension quenches on Fe 3+ with Stern-Volmer constant K sv of 1.79 × 10 3 M -1 and limit of detection of 17 μM. The MIL-92(Y):9%Eu 3+ aqueous suspension also has turn-off sensing ability towards Cr 2 O 7 2- and CrO 4 2- with K sv values of 3.5 × 10 3 and 6.14 × 10 3 M -1 , respectively. It has detection limitations of 10 and 5 μM on Cr 2 O 7 2- and Cr 2 O 7 2- ions, respectively.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 37
·87830-87850
·
IF 5.8
Liu Gen,Lin Yingzi,Li Siwen,Shi Chunyan,Zhang Dongyan,Chen Lei
Fe-BOC-X
photocatalyst was successfully prepared by solvothermal method. The photocatalytic activity of Fe-BOC-X was determined by ciprofloxacin (CIP), a typical fluoroquinolone antibiotic. Under sunlight irradiation, all Fe-BOC-X showed better CIP removal performance than original BiOCl. In comparison, the photocatalyst with iron content of 50 wt% (Fe-BOC-3) has excellent structural stability and the best adsorption photodegradation efficiency. The removal rate of CIP (10 mg/L) by Fe-BOC-3 (0.6 g/L) reached 81.4% within 90 min. At the same time, the effects of photocatalyst dosage, pH, persulfate, persulfate concentration, and combinations of different systems (PS, Fe-BOC-3, Vis/PS, Vis/Fe-BOC-3, Fe-BOC-3/PS, and Vis/Fe-BOC-3/PS) on the reaction were systematically discussed. In reactive species trapping experiments, electron spin resonance (ESR) signals revealed that the photogenerated holes (h + ), hydroxyl radical (•OH), sulfate radical (•SO 4 − ), and superoxide radical (•O 2 − ) played an important role in CIP degradation; hydroxyl radicals (•OH) and sulfate radicals (•SO 4 − ) play a major role. Various characterization methods have demonstrated that Fe-BOC-X has larger specific surface area and pore volume than original BiOCl. UV–vis DRS indicate that Fe-BOC-X has wider visible light absorption and faster photocarrier transfer and provides abundant surface oxygen absorption sites for effective molecular oxygen activation. Accordingly, a large number of active species were produced and participated in the photocatalytic process, thus effectively promoting the degradation of ciprofloxacin. Based on HPLC–MS analysis, two possible decomposition pathways of CIP were finally proposed. The main degradation pathways of CIP are mainly due to the high electron density of piperazine ring in CIP molecule, which is mainly attacked by various free radicals. The main reactions include piperazine ring opening, decarbonylation, decarboxylation, and fluorine substitution. This study can better open up a new way for the design of visible light driven photocatalyst and provide more ideas for the removal of CIP in water environment.
研究领域:
环境科学
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光催化材料
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污染治理
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DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Shi-Kang Chen,Jin-Jin Liu,Xin Wang,Hui Luo,Wei-Wei He,Xiao-Xiao Song,Jun-Yi Yin,Shao-Ping Nie
Bacterial infection severely hinders skin wound healing, highlighting the critical application value of developing antibacterial and anti-inflammatory hydrogel dressings. In this work, we focused on β-glucan from Hericium erinaceus (HEBG) as the research object, and proposed a solvent-induced combined temperature manipulation technique to trigger multilevel self-assembly of β-glucan. Furthermore, we incorporated green synthesized near-infrared photosensitizer tannic acid (TA)/iron (III) complex into the system. A hydrogel with exceptional antibacterial properties, capable of responding to near-infrared photothermal stimuli while exhibiting remarkable stiffness and structural consistency, was successfully synthesized. Under near-infrared radiation, HEBG/TA/Fe hydrogels produced local hyperthermia and exhibited excellent antibacterial activity against bacteria-infected wounds. Moreover, the HEBG/TA/Fe hydrogel demonstrates its ability to regulate cytokines by effectively inhibiting the production of inflammatory mediators TNF-α and IL-6, while simultaneously enhancing the expression of cell proliferation factor KI-67 and markers associated with angiogenesis such as CD31 and α-SMA. Notably, the results of tissue staining revealed that the NIR + HEBG/TA/Fe 5 hydrogel could effectively promoting granulation and vascularization, improving collagen deposition in infected wounds thereby accelerating the healing process. These findings indicate that mixed hydrogels exhibit potential as viable options for the treatment of bacterial infections.
研究领域:
生物材料学
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医学
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Shuaizhong Zhang,Chengzhen Liu,Yongkai Yuan,Minghao Fan,Dandan Zhang,Dongfeng Wang,Ying Xu
A novel macroporous (~150 μm) double network hydrogel (TR/PAA) was prepared from tea residue and acrylic acid, and its performance was systematically evaluated. The static adsorption experiments showed that gel exhibited high selectivity and adsorption capacity, ultrafast kinetics (~10 min) for Cr(III), Pb(II) and Fe(III). The adsorption behavior showed heterogeneous and chemisorption process adsorption capacities of 206.19, 253.16, and 94.88 mg g −1 for Cr(III), Pb(II) and Fe(III), respectively. In pluralistic systems, TR/PAA showed the adsorption order of Fe(III) > Cr(III) > Pb(II). Mechanism studies confirm that nitrogen and oxygen-containing functional groups play a major role in the adsorption process. In the fixed-bed column experiments, the treatment volume of simulated wastewater reached 1400 bed volumes (BV) (21.6 L), producing only 7 BV (323 mL) eluent. This work provides a new avenue for the combination of TR/PAA reuse and heavy metal removal, which is expected to be applied in actual wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2013
·
IF 3.258
Yan Xu,Yan He,Xiaoli Feng,Luyi Liang,Jianming Xu,Philip C. Brookes,Jianjun Wu
A novel Fe(III) reducing bacterium, Clostridium beijerinckii Z, was isolated from glucose amended paddy slurries, and shown to dechlorinate pentachlorophenol (PCP). Fifty percent of added PCP was removed by C. beijerinckii Z alone, which increased to 83% in the presence of both C. beijerinckii Z and ferrihydrite after 11 days of incubation. Without C. beijerinckii Z, the surface-bound Fe(II) also abiotically dechlorinated more than 40% of the added PCP. This indicated that the biotic dechlorination by C. beijerinckii Z is a dominant process causing PCP transformation through anaerobic dechlorination, and that the dechlorination rates can be accelerated by simultaneous reduction of Fe(III). A biochemical electron transfer coupling process between sorbed Fe(II) produced by C. beijerinckii Z and reductive dehalogenation is a possible mechanism. This finding increases our knowledge of the role of Fe(III) reducing genera of Clostridium in dechlorinating halogenated organic pollutants, such as PCP, in anaerobic paddy soils.
研究领域:
环境微生物学
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生物修复
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土壤科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chen Wang,Zewei Hu,Wei Lou,Mingjie Huang,Wei Xiang,Tao Zhou,Juan Mao,Xiaohui Wu
This study has demonstrated that the Fenton fluidized bed (FFB) technology could successfully immobilize As ions on the iron-crystallized (IC) carriers, with simultaneous crystallization of ferric and mineralization of organic pollutants. It was found that rapid fluidized immobilization of aqueous As(V) on the IC carriers was through surface favorable bidentate complexion, while the adsorptive removal of As(III) was rather slow. Adding Fe 3+ caused competitive complexion and inhibited the As(V) immobilization. However, effective oxidative crystallization of Fe(II) and As(III) in FFB would take place. With the simultaneous generation of As(V) and Fe(III) by rapid •OH oxidation, two different crystalline precursors would be formed on the IC carriers, leading to efficient co-crystallization of As(V)/Fe(III). Recursive Fe(III) crystallization in the FFB continuously provided essential surface hydroxyl groups for capturing As(V), inducing layer-by-layer co-crystallized immobilization As(V)/Fe(III). The long-term continuous-flow treatment of a practical As(III)-containing industrial organic wastewater exhibited effective/stable co-crystallizations of As(V)/Fe(III), as well as COD removal. The FFB technology is expected to be a good option in treating complex industrial wastewater containing heavy metal and recalcitrant organic pollutants.
研究领域:
环境科学
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化学工程
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废水处理
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2020
·
IF 7.864
Di Huang,Jinzhao Wang,Hongling Xia,Yue Zhang,Fengxia Bao,Meng Li,Chuncheng Chen,Jincai Zhao
Both Fe(III) and fatty acids are ubiquitous and important species in environmental waters. Because they are amphipathic, many fatty acids are surface active and prone to enrichment at the air–water interface. Here, we report that by using nonanoic acid (NA) as a model fatty acid, coexisting Fe(III), even at concentrations as low as 1 μM, markedly enhanced the photochemical release of NA-derived volatile organic compounds (VOCs) such as octanal and octane into the air. Further studies indicated that the surface-enriched fatty acids dramatically increase the local concentration of Fe(III) at the water surface, which enables Fe(III)-mediated photochemical reactions to take place at the air–water interface, and the VOCs facilely produced by fatty acid photooxidation can then be released into the air. Moreover, the product distribution in the Fe(III)-mediated reactions was largely different from that in other photochemical systems, and a mechanism based on photochemical decarboxylation is proposed. Considering that the coexistence of fatty acids and Fe(III) in the environment is common, the enhanced photochemical release of VOCs by surface-enriched fatty acids and Fe(III) may be an important channel for the atmospheric emission of VOCs, which are known to play an essential role in the formation of ozone and secondary organic aerosols.
研究领域:
环境科学
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化学
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大气化学
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Xiying Zhu,Lijia Liu,Yudan Wang,Fuqiu Ma,Yao Tian,Hongxing Dong,Chunhong Zhang
An ideal adsorption material of uranium with not only a high adsorption capacity and high selectivity but also a broad applicability is required. In this study, a porous Fe(III) complex of phosphorylated hypercrosslinked calix[4]arenes (C4HP-Fe(III)) was synthesized. Anchoring Fe(III) via phosphate groups on phosphorylated, hypercrosslinked calix[4]arene (C4HP) significantly improved the uranium-adsorption performance, as evidenced by a 47.9 % increase in the uranium uptake (the adsorption capacity increased up to 497.6 mg·g −1 in a 60-mg·L −1 U solution). C4HP-Fe(III) is a promising adsorbent for uranyl extraction and exhibits fast capture kinetics (the adsorption capacity sharply increased in the first 30 min, which accounted for 86 % of the total amount of uranyl ions adsorbed). A study on the effect of pH on the uranium adsorption of C4HP-Fe(III) suggested that the adsorption capacity was higher than 300 mg·g −1 in the pH range of 5–10, even in a strongly acidic environment of pH 3–4, and it also had a specific adsorption capacity (≥ 168.2 mg·g −1 ). Furthermore, C4HP-Fe(III) possesses excellent ion selectivity for uranyl in simulated wastewater and simulated seawater, and the K d U can reach 4.1 × 10 3 mL·g −1 and 4.4 × 10 4 mL·g −1 , respectively. After 6 cycles, C4HP-Fe(III) maintained its original adsorption capacity of 92.2 %. This makes it useful for wide applications and can be used for capturing uranyl ions from industrial wastewater and natural seawater. The effective extraction of uranyl was mainly attributed to the chelation of uranyl ions with both phosphate groups and active hydroxyl groups (due to the introduction of Fe 3+ ).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Fangyuan Gai,Li Yin,Mengmeng Fan,Ling Li,Johnny Grahn,Yuhui Ao,Xudong Yang,Xuming Wu,Yunling Liu,Qisheng Huo
This work demonstrated the synthesis of (4E)-4-(4-(diphenylamino)benzylideneamino)-1,2-dihydro-1,5- dimethyl-2-phenylpyrazol-3-one (DBDDP) for Fe (III) detection in aqueous media and in the core of silica cross-linked micellar nanoparticles in living cells. The free DBDDP performed fluorescence enhancement due to Fe (III)-promoted hydrolysis in a mixed aqueous solution, while the DBDDP-doped silica cross-linked micellar nanoparticles (DBDDP-SCMNPs) performed an electron-transfer based fluorescence quenching of Fe (III) in living cells. The quenching fluorescence of DBDDP-SCMNPs and the concentration of Fe (III) exhibited a linear correlation, which was in accordance with the Stern-Volmer equation. Moreover, DBDDP-SCMNPs showed a low limit of detection (LOD) of 0.1 ppm and an excellent selectivity against other metal ions. Due to the good solubility and biocompatibility, DBDDP-SCMNPs could be applied as fluorescence quenching nanosensors in living cells.
研究领域:
分析化学
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生物化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Junhui Yang,Wenlei Wang,Jinglin Yin,Yanmei Li,Ziyang Xiang,Yi Peng,Ying Yan,Jing Wang,Hongbo Xiao
In this study, a matrix composite material of CdZnS and α-FeOOH on carbon cloth (CZS@FeOOH@CC) was prepared by a hydrothermal method , and was used for the degradation of As(III). The composite material has good photocatalytic activity of removing As(III) in the presence of oxalate. CZS@FeOOH@CC can completely degrade 10 mg/L As(III) within 10 min under visible light irradiation. The influence factors of CZS@FeOOH@CC composite material on catalytic oxidation of As(III) were also studied in the oxalate system. The photocatalytic oxidation efficiency of As(III) is affected by the oxalate concentration in the reaction system, and the atmosphere plays a major role in the degradation of As(III). Under visible light, oxalate first combines with Fe(III) on the surface of iron oxide to form Fe(III)-oxalate complex, and then the Fe(III)-oxalate composite is activated to produce·C 2 O 4 − . In the presence of oxygen, Fe(II) readily reacts with O 2 and oxidizes to Fe(III). The introduction of CdZnS promoted the separation of interfacial electron holes, and accelerated the REDOX cycle of Fe(II)/Fe(III). This study provides a feasible and simple method for accelerating the catalytic removal of heavy metals from wastewater by iron-based materials.
研究领域:
环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Changjian Li,Yueqi Wang,Xiaojie Zhang,Xueling Guo,Xiaoxuan Kang,Libo Du,Yang Liu
Carbon dots have attracted considerable attention in the field of biosensors and bioimaging because of their excellent optical performance and low toxicity. However, the cellular uptake of the reported carbon dots generally has a low efficiency, which limits their practical applications. In this study, we reported a novel red fluorescent sulfur and nitrogen co-doped carbon dots with small molecular phenylboronic acid tags (i.e. S, N-CDs-PBA). The S, N-CDs-PBA can be taken up rapidly by PC12 cells in twenty minutes and showed high sensitivity for the detection of Fe 3+ ions. The maximum emission wavelength is at 593 nm under the excitation of 550 nm. The absolute fluorescence quantum yield is 23% in water. The fluorescence can be effectively and selectively quenched by Fe 3+ ions and the linear response range of Fe 3+ ions was obtained from 0.3 µM to 5.0 µM with a detection limit as low as 0.1 µM. It could be concluded that the rapid uptake of S, N-CDs-PBA into cells and high photoluminescence quantum yield of red emission are beneficial for quick detection of Fe 3+ ions.
研究领域:
生物传感器
·
生物成像
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分析化学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 2
·2308849
·
IF 19
Yashuai Pang,Minsen Xie,Xinghao Lu,Zhao Wan,Zhuohang Zhong,Waqas Muhammad,Xiang Long Huan,Yinghua Niu,Zhen Zhang,Weiqiang Lv
Lithium–sulfur (Li–S) batteries have attracted wide attention as high-energy-density energy storage devices, but their practical applications are hindered by the severe shuttle effect and sluggish kinetics of lithium polysulfides (LiPSs). To address these challenges, polar mediators are employed to chemisorb and catalyze LiPSs, but most of them suffer from low electronic conductivity and poor catalytic activity. Here, a novel strategy is reported to enhance both properties by dispersing Fe(III) atoms in VO 2 nanoribbons(Fe-VO 2 ), creating electronic metal-support interactions (EMSI) that modulate the electronic structure and charge transfer of VO 2 . Theoretical calculations reveal that EMSI lowers the energy barrier for the decomposition of Li 2 S from 1.60 to 1.32 eV and increases the electronic conductivity of VO 2 . Fe doping reduces the Li-ions diffusion barrier from 1.42 eV in VO 2 to 0.99 eV in Fe-VO 2 . The Fe-VO 2 catalyst shows strong adsorption and fast converstion of LiPSs, resulting in high energy density and long cycling life of Li-S batteries. The cathode with Fe-VO 2 maintains a higher capacity retention of 67% after 500 cycles at 1 C, compared with 52.4% and 53.6% for the carbon black based cathode and VO 2 based cathode, respectively. This work demonstrates the potential of EMSI for designing efficient catalysts for Li–S batteries and provides new insights into the electronic structure engineering of polar mediators.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）