SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Chenhui Wei,Shujun Yin,Heyun Fu,Xiaolei Qu,William A. Mitch,Dongqiang Zhu
Here we investigated the mediation efficiency of different size fractions of rice straw-derived black carbon (BC) using sulfide-induced nitrobenzene reduction as a model system. The bulk BC was divided into three size fractions: dissolved BC (size <0.45 μm), colloidal BC (0.45 μm < size < 1 μm), and particulate BC (size > 1 μm). With the presence of BC fractions (250 mg/L) nitrobenzene reduction by Na 2 S was significantly facilitated, wherein the mediation efficiency was positively correlated with the BC fraction's oxygen group content in an order of particulate BC < colloidal BC ≪ dissolved BC. Consistently, the oxidation treatment of particulate BC with O 3 or HNO 3 improved the mediation efficiency, whereas the reduction treatment with NaBH 4 reduced the mediation efficiency. The supernatant collected with dialysis or filtration of suspension of BC materials pre-reacted with Na 2 S could effectively reduce nitrobenzene, suggesting that reactive reducing sulfur species were produced in aqueous solutions by reacting sulfide only with BC materials. This was evidenced by the fact that polysulfides and polysulfide radicals were both detected in the supernatant. As demonstrated by electron paramagnetic resonance analysis, the quinone moieties at the surface of BC materials accepted electrons from sulfide and turned into semiquinone free radicals, consequently leading to formation of reactive reducing sulfur species and thus enhanced nitrobenzene reduction. The strong mediation efficiency on redox reactions observed for colloidal BC and dissolved BC combined with their significant mobility in subsurface environments indicate that these carbonaceous materials may play an important role in the fate process of organic contaminants as both carriers and catalysts. Capsule The surface quinone moieties of BC induce the formation of reactive reducing sulfur species by acting as one-electron acceptors and facilitate nitrobenzene reduction by sulfide.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
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2021
·
IF 2.545
Yiwen Yao,Feifei Xing,Shourong Zhu
The [2 + 2] condensation between 1,8-dihydroxyanthraquinone diester and 1,3-diamino-2-propanol in ethanol affords pseudocalixarene macrocyclic L2 in high yield. Heating L2 to 200 °C in DMSO can generate much smaller [1 + 1] macrocycle L1 . Crystal structure of L1 shows that all non-hydrogen atoms are coplanar except one carbon from 1,3-diamino-2-propanol. L1 is quite inert, but L2 can interact with alkaline, alkaline-earth, as well as Zn 2+ , Cu 2+ , Fe 3+ and Al 3+ cation (chloride) evidenced by their CV and 1 H NMR. With a L2 :M (1:2), there are discernable UV–vis spectrum/ 1 H NMR changes in the presence Cu 2+ , Fe 3+ , Al 3+ . Anion plays a key role in the cation binding process as the chromogenic response to Li + , Na + , K + , Ba 2+ and TBA + hydroxide. L2 forms 1:1 complex with TBAOH and 2:3 complex with NaOH, KOH, Ba(OH) 2 in DMSO. L2 reacts with LiOH in 1:4 stoichiometric and is one of the highest lithium loading ligand. The reaction is second-order with t 1/2 ~ 30 min for 0.25 mM L2 in the presence of 4.0 eq. LiOH. Besides hydroxide, L2 can interact with TBAF to form 1:1 host–guest complexes evidenced by their color and NMR change. With bulky cation, TBAOH shifts E p(II) more negative, while other cations shift E p(II) to positive. L2 is an ion pair acceptor that binds hydroxide and fluoride salt chromogenic.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
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IF 2.196
Chao Guo,Yangtong Tan,Yu Qian,Siyu Yang
Experimental liquid–liquid equilibria (LLE) data for ternary (methyl propyl ketone + hydroquinone + water) and (methyl propyl ketone + resorcinol + water) systems were determined under atmospheric pressure at T = 298.15, 318.15, and 333.15 K. Distribution coefficients and separation factors were calculated to evaluate extraction effectiveness. Hand, Bachman, and Othmer–Tobias equations were utilized to confirm consistency of experimental LLE data. Thermodynamic NRTL and UNIQUAC models were used to correlate experimental LLE data, and corresponding binary interaction parameters were obtained. The estimated data from the two models agree well with experimental LLE data. The NRTL model gives a better agreement than the UNIQUAC model for ternary (methyl propyl ketone + hydroquinone or resorcinol + water) systems.
研究领域:
化学工程
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热力学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Haiguan Yang,Junqi Zha,Peng Zhang,Yuemei Qin,Tao Chen,Fanggui Ye
A simple method was proposed for the preparation of CeVO 4 . The as-synthesized CeVO 4 was, for the first time, demonstrated to exhibit both peroxidase-like and oxidase-like activity, which catalyzes the oxidation of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) to form a typical blue solution in the presence or absence of H 2 O 2 . Moreover, the mechanism of its dual-enzyme activity was investigated in detail. The Michaelis constant ( K m ) value for CeVO 4 (0.136 mM) was lower than that of horseradish peroxidase (0.424 mM) with TMB as the substrate. Interestingly, hydroquinone (H 2 Q), dihydroxybenzene isomer, undergoes reduction accompanying the oxidation of TMB by the CeVO 4 oxidase mimic along with a visible color change, while the other two dihydroxybenzene isomers, i.e., resorcinol (RC) and catechol (CC), do not. Based on these findings, a colorimetric platform was developed to discriminate H 2 Q from RC and CC. Under optimal conditions, a linear relationship between the H 2 Q concentration and absorbance was observed from 0.05 to 8 μM, and a limit of detection of 0.04 μM was achieved. Moreover, this colorimetric platform can selectively reveal H 2 Q concentrations in the presence of other dihydroxybenzene isomers.
研究领域:
生物化学
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环境科学
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材料科学
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DOI
高影响因子
Water
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2021
·Vol. 13
·期 17
·2315
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IF 3.103
Shuangyang Zhao,Meixi Li,Jie Ding,Shanshan Yang,Yani Zang,Yan Zhao,Xinlei Gao,Nanqi Ren
In the last few decades, anthraquinone and its derivatives (AQs) have been intensively applied to electrochemical, textile and dye, and photovoltaic industries. This has increased the levels of AQs in the natural environment and threatens human health. To remove AQs from the aqueous phase and recover these multi-functional molecules, a binary magnetic adsorbent, reduced graphene/Fe3O4(rGO/Fe3O4), was synthesized via a hydrothermal method. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), Raman spectra, and thermogravimetric analysis (TGA) were then used to characterize the samples. The adsorption capacities of rGO/Fe3O4to AQs were investigated by selecting anthraquinone-2-sulfonate (AQ2S) as a model molecule. The adsorption process followed the Langmuir adsorption isotherm and the second-order kinetics. The regeneration of adsorbents and the recycling of AQ2S and solvent were simultaneously achieved by Soxhlet extraction and rotary evaporation. These results confirm the high adsorption efficiency of rGO/Fe3O4for removing AQs from water and provide a promising approach to recover the valuable molecules from the aqueous phase.Keywords:adsorption;magnetic composite;anthraquinone-2-sulfonate;regeneration
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
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2023
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IF 11.4
Chengyang Zhang,Guoyang Zhang,Jiyuan Jin,Hongcen Zheng,Zhiwei Zhou,Shujuan Zhang
The coexistence of selenite (Se(IV)) and acetylacetone (AA) generated a synergistic effect on the growth inhibition of a bloom-forming cyanobacterium, Microcystis aeruginosa. The mechanism behind this phenomenon is of great significance in the control of harmful algal blooms. To elucidate the role of Se(IV) in this effect, the reactions in ternary solutions composed of Se(IV), AA (or two other similar hydrogen donors), and quinones, especially benzoquinone (BQ), were investigated. The transformation kinetic results demonstrate that Se(IV) played a catalytic role in the reactions between AA (or ascorbic acid) and quinones. By comparison with five other oxyanions (sulfite, sulfate, nitrite, nitrate, and phosphate) and two AA derivatives, the formation of an AA-Se(IV) complexation intermediate was confirmed as a key step in the accelerated reactions between BQ and AA. To our knowledge, this is the first report on Se(IV) as a catalyst for quinone-involved reactions. Since both quinones and Se are essential in cells and there are many other chemicals of similar electron-donating properties to that of AA, the finding here shed light on the regulation of electron transport chains in a variety of processes, especially the redox balances that are tuned by quinones and glutathione.
研究领域:
环境科学
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微生物学
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生态学
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DOI
PubMed
高影响因子
RSC Advances
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2023
·Vol. 13
·期 17
·11720-11727
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IF 3.9
Wanqian Cai,Chongbiao Zhang,Yourong Wu,Wei Wang,Mei Lin,Tengfei Lin,Cong Lin,Min Gao,Chunlin Zhao,Xiao Wu
As emerging contaminants, antineoplastic drugs are widely used, but their residues in water may cause long-term genotoxicity to aquatic organisms and human beings. Here, waste moxa ash was selected as biomass raw material and modified by ball milling to obtain carbon-based materials with excellent adsorption performance, which were used to remove the antineoplastic drug mitoxantrone (MTX) from water. The experimental results indicate that moxa ash modified by ball milling in hydrogen peroxide exhibits ultrafast removal of MTX (the removal efficiency reaches 97.66% in 1 min and 99.72% in 30 min). The pseudo-second-order kinetics and Freundlich isotherm models accurately describe the MTX adsorption process, and the mechanism of adsorption probably involves pore filling, hydrogen bond, π–π interaction and electrostatic attraction. Not only that, moxa ash also has the ability to remove dyes such as malachite green (97.81%) and methylene blue (99.97%). In this study, a simple and environmentally friendly process was used to convert waste moxa ash into an effective MTX adsorbent, providing a feasible solution for controlling MTX pollution and identifying a circular and economic way to reuse the waste.
研究领域:
环境科学
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材料科学
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药学
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Shanshun Wang,Xiaowei Kang,Siying Wu,Lei Dong,Wei-Shi Li,Fu-Gang Zhao
The extremely limited energy density and leakage risks of liquid electrolytes in supercapacitors have hindered their widespread industrialization. In this study, a novel cross-linked gel polymer electrolyte was designed and prepared by incorporating redox-active units to enhance energy density and address leakage issues in supercapacitors. These quasi-solid-state redox-active electrolytes (DCBQ@PVA) were synthesized through nucleophilic functionalization of a polyvinyl alcohol (PVA) matrix with dichlorobenzoquinone (DCBQ) redox crosslinkers. Electrolyte membranes were fabricated via solution casting, and their performance was systematically optimized. As expected, the DCBQ@PVA gel electrolyte significantly improved the electrochemical performance of quasi-solid-state supercapacitors, expanding the voltage window from 1.0 V to 1.8 V, increasing the specific capacitance from 27 F g⁻¹ to 43 F g⁻¹, and ultimately achieving a fivefold enhancement in energy density (up to 18.8 Wh kg⁻¹).
研究领域:
电化学
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材料科学
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储能技术
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高分子科学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Umar Abdulbaki Danhassan,Xin Zhang,Riying Qi,Mahmoud M. Ali,Kuichuan Sheng,Hongjian Lin
Pristine biochar (PBC) is flourishing in adsorptive oxidation for pollutants remediation as an alternative to carbon adsorbents derived from coal/petroleum carbon sources, multistep, and hash synthesis. However, it is widely overlooked for aqueous S 2- remediation because the rational design of biochar with proper conductive and porous structure is challenging. Cobalt or iron ion was impregnated in biomass to produce biochar with different porous and conductive structures and explore S 2- adsorptive oxidation mechanism. Finding suggests cobalt and iron ions facilitate biomass decomposition to remove volatile matter, which transforms them into elemental cobalt (Co 0 ) or magnetite (Fe 3 O 4 ) on biochars (BC-Co) or (BC-Fe) and improves the porous structure. BC-Co benefitted from superior mesopores to adsorb S 2- 2.4 and 35 times faster than PBC and BC-Fe, achieving 811 ± 146 mg-S 2- /g maximum capacity. BC-Fe removed S 2- far less than PBC because Fe 3 O 4 on its surface blocked S 2- diffusion channel to the active site. It is postulated that S 2- was removed from water via external and internal diffusion and adsorption and oxidation at active sites. S 2- diffuses from bulk liquid to film near the biochar pore and into the pores via pore and surface diffusion to the active site, where it is adsorbed and oxidized to elemental sulfur or sulfate by quinone , semiquinone, or hydroxyl radicals at the wall of biochars. This study has documented fundamental information for developing mesoporous electroactive biochar for contaminant removal.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
高影响因子
Journal of Pharmaceutical Analysis
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2021
·
IF 4.769
Anqi Huang,Wenwen Deng,Xiao Li,Qutong Zheng,Xuanxuan Wang,Yuxiu Xiao
Natural long-chain alkanol and alkyl carboxylic acid were used to prepare novel hydrophobic deep eutectic solvents (HDESs). These HDESs are liquid at room temperature and have low viscosity (<12.26 mPa‧s), low polarity (lower than that of methanol, ChCl-based deep eutectic solvents and other reported HDESs), and low density (<0.928 g/mL). A simple one-pot method based on a novel HDES–water two-phase extraction system was constructed for the extraction of weak-polarity bioactive components, anthraquinones, from Rhei Radix et Rhizoma. This HDES-based new extraction method does not consume hazardous organic solvents and can obtain a total anthraquinone yield of 21.52 mg/g, which is close to that obtained by the Chinese pharmacopoeia method (21.22 mg/g) and considerably higher than those by other reported HDESs-based extraction methods (14.20–20.09 mg/g, p < 0.01). The high extraction yield can be mainly attributed to the severe destruction of the RRR cell walls by the extraction system and the excellent dissolving ability of novel HDESs for anthraquinones.
研究领域:
药学
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天然产物化学
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DOI
高影响因子
Journal of Pharmaceutical Analysis
·
2025
·
IF 8.9
Jia Guo,Yuqing Song,Mengru Sun,Jun Qian,Dihang See,Tian Tian,Yunqing Song,Wei Liu,Hongping Deng,Yao Sun,Guangbo Ge,Yongfang Zhao
Osteoporosis, a severe systemic skeletal disorder characterized by decreased bone mineral density, leads to increased risks of bone fragility and fracture. Although some herbal medicines are clinically used for treating osteoporosis, the crucial anti-osteoporotic constituents and their mechanisms have not been well-elucidated. Notum, a negative regulator of Wnt/β-catenin signaling, has been validated as a druggable target for enhancing cortical bone thickness and alleviating osteoporosis. Herein, we showcase an efficient strategy for uncovering the key anti-Notum constituents from herbal medicines via integrating biochemical, phytochemical, computational, and cellular assays. Following screening the anti-Notum potentials of herbal medicines, Polygonum multiflorum Thunb. (PM), a commonly used anti-osteoporosis herb , showed potent and competitive inhibition against Notum. Phytochemical profiling coupling with docking-based virtual screening suggested that three anthraquinones, including rhein, emodin, and chrysophanol, showed high binding-potency towards Notum. Biochemical assays validated that three anthraquinones were strong competitive inhibitors of Notum, while rhein was the most potent one (IC 50 = 9.98 nM). Cellular investigations demonstrated that rhein markedly promoted osteoblast differentiation in dexamethasone-challenged MC3T3-E1 osteoblasts, while RNA sequencing showed that rhein remarkably regulated Wnt signaling-related and osteogenic differentiation-related genes. In vivo tests showed that rhein displayed favorable safety profiles in healthy mice and this agent significantly elevated bone mineral density, augmented trabecula and cortical bone thickness in dexamethasone-induced osteoporotic mice. Collectively, this study showcases an efficient strategy for uncovering the key anti-Notum constituents from herbal medicines, while rhein was identified as a naturally occurring Notum inhibitor that shows favorable safety profiles and impressive anti-osteoporosis effects.
研究领域:
药理学
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生物化学
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计算生物学
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DOI
高影响因子
Small Methods
·
2023
·
IF 12.4
Chunlai Song,Qiang Wang,Ruihang Wen,Qiben Tang,Zhiqiang Luo,Zhihao Yuan
Benzoquinone (BQ) is considered to be a desirable cathode material for aqueous zinc-based batteries. The major limitations of BQ electrode are the severe sublimation and poor electrical conductivity, which results in serious mass loss during electrode preparation and inferior rate performance. In this study, iodine (I 2 ) species are utilized as an efficient catalyst for the highly reversible conversion of BQ/BQ 2− couple in the Zn-BQ battery system, wherein N-doped porous carbon is employed as a host material for anchoring the BQ molecule. In the combination electrode (denoted as BQ-I@NPC) with 1wt% I 2 additive where I 2 can serve as a carrier to accelerates the Zn 2+ transmission, and reduce the voltage hysteresis of the electrode. As a result, the BQ-I@NPC cathode delivers a high specific capacity of ≈482 mAh g −1 at 0.25 A g −1 , realizing a high energy density of 545 Wh kg −1 (based on BQ), which is the highest values among reported organic cathode materials for aqueous Zn-based batteries. Also, a high BQ loading (8 mg cm −2 ) can be attained, and achieving a superior cycling stability with a capacity retention of ≈80% after 20,000 times at 10 C. The work proposes an effective approach toward high performance organic electrode materials.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）