CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Yahui Wang,Qihuang Huo,Huijun Chen,Yu Feng,Jiancheng Wang,Sheng Wang,Liping Chang,Weiren Bao
To develop the high value utilization of high organic sulfur coal instead of combustion as well as save the cost of mercury pollution control, we attempted to transmute the inherent sulfur of high organic sulfur coal, in the case of LF coal (which is from Linfen city, China), to active sulfur species for mercury capture by doping metal oxides, and CuO performed best among various metal oxides. The sorbent (or activated sample) prepared from LF coal with doping CuO is labelled LF+Cu-A, around which a series of experiments were conducted. Firstly, the effects of operational conditions, including GHSV (gas hourly space velocity), temperature and flue components, on the mercury capture performance of LF+Cu-A were thoroughly investigated, and results showed that LF+Cu-A had an excellent mercury capture performance. The average mercury capture efficiency is 97.8 % during a two-hour test under N 2 +O 2 +H 2 O+SO 2 +NO atmosphere with GHSV of 240000 h −1 and temperature of 120 °C. Secondly, the experimental data were fitted by four kinetic models, and it is found that the mercury adsorption process under low temperatures (60, 90, 120 °C) and high temperature (150 °C) are in the best agreement with the pseudo-first-order model and the intra-particle diffusion model respectively. Last, the mercury capture mechanisms of LF+Cu-A were revealed by Hg-TPD (Hg-temperature programed desorption) experiment, Raman analysis and XPS (X-ray photoelectron spectrometer) spectra, and it is indicated that the multiple sulfur species and Cu 2+ play roles in the mercury capture process, during which elemental mercury are oxidized to HgS and fixed on the surface of LF+Cu-A.
研究领域:
环境科学
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能源技术
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产品关联
DOI
高影响因子
Environmental Science-Processes & Impacts
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2020
·Vol. 22
·期 9
·1898-1907
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IF 3.238
Shujun Yin,Chenhui Wei,Dongqiang Zhu
Understanding the mechanisms controlling the redox transformation of organic contaminants mediated by biochar is of great significance for application of biochar in remediation of contaminated soils and sediments. Here we investigated the mediation effect of a pine wood-derived biochar (P-char) in comparison with multiwalled carbon nanotubes (MCNTs) and graphite on the reductive dechlorination of hexachloroethane by sulfide. Upon normalization of the mediator's surface area, the reduction rate of hexachloroethane follows an order of P-char < MCNTs < graphite. Aqueous polysulfides and polysulfide free radicals were readily produced by reacting sulfide only with P-char, and the supernatant separated from the reaction system could account for 83.4% of the pseudo-kinetic rate constant of hexachloroethane mediated by P-char. In contrast, MCNTs and graphite had weak abilities to produce reactive sulfur species, and the supernatant exhibited very low reduction capability (<20.7%) of hexachloroethane. Electron paramagnetic resonance (EPR) analysis demonstrated that the surface quinone moieties on P-char induced the formation of polysulfides and polysulfide free radicals from sulfide by serving as one-electron acceptors. Consistently, polysulfides prepared by reacting elemental sulfur with sulfide showed much stronger reducing capability compared to sulfide. Thus, the mediation effect of P-char was dominantly attributed to the surface quinone-induced formation of reactive reducing sulfur species, whereas the mediation effect of MCNTs and graphite mainly stemmed from the enhanced electron transfer by the graphitized carbon. These results showed for the first time that surface quinone-induced formation of aqueous reactive sulfur species could control biochar-mediated reductive dechlorination of chloroorganic contaminants by sulfides.
研究领域:
环境科学
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污染修复
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Peng Juan,Junmei Liang,Tao Chen,Qicheng Zhang,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
MoS2 and its derivates have been regarded as a promising catalyst for the hydrogen evolution reaction (HER), and their edge sulfur sites are key factors for the HER performance. Here, we develop a facile strategy to grow nonstoichiometric molybdenum sulfide (MoSx) with more active sulfur sites on porous N-doped graphene (MoSx@CN). Experiments demonstrate that the introduction of porous N-doped graphene not only facilitates the fast transfer of charge and the efficient infiltration of the electrolyte but the N dopants could be used as the nucleation sites for MoSx to possess more active bridging S22– sites. Consequently, the obtained MoSx@CN catalyst possesses an outstanding HER activity, which shows an overpotential of 256 mV at 100 mA cm–2 with a Tafel slope of 49 mV dec–1. This study provides a new strategy to optimize transition metal dichalcogenide-based catalysts for energy-related applications.
研究领域:
材料科学
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能源催化
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DOI
高影响因子
ANALYTICAL CHEMISTRY
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2018
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IF 6.042
Hui Zhang,Lizhen Xu,Wenqiang Chen,Jun Huang,Chusheng Huang,Jiarong Sheng,Xiangzhi Song
Biothiols are essential reactive sulfur species (RSS), which play crucial roles in various critical physiological activities. To clarify their complex correlations in signal transduction and metabolism pathways, methods to distinguish H2S, cysteine (Cys), homocysteine (Hcy), and glutathione (GSH) at the same time are highly needed. Herein, we deliberately integrate 7-diethylcoumarin and resorufin through an ether bond to develop RC for simultaneous differentiation of Cys, Hcy, GSH, and H2S for the first time. RC displays distinct fluorescence colors in response to H2S, Cys, Hcy, and GSH as red, blue-red, blue-green-red, and green-red, respectively, both in aqueous media and living cells. This work not only reported a robust molecule, RC, to disentangle the intricate interplay networks among different biothiols in biosystems but also demonstrated a strategy for the design of multisignal fluorescent probes for the simultaneous sensing of diverse RSS species as well as other biological species.
研究领域:
化学
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生物化学
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细胞生物学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2021
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IF 9.127
Ying Tang,Hongwei Kang,Jun Zheng,Hongbao Li,Rui Wang,Longhai Zhang,Quanwei Ma,Xuyang Xiong,Tengfei Zhou,Chaofeng Zhang
As an anode material for lithium ion batteries (LIBs), Bi 2 S 3 possesses high redox activity and theoretical capacity. However, severe volume variation (alloying/dealloying processes) and active sulfide loss (dissolution of polysulfides) during cycling always result in rapid capacity degradation. Thus, we fabricated MOF-derived Bi 2 S 3 hybrid nanofibers coated by organic framework via facile polymerization and sulfidation processes. Such unique coating nanolayers derived from the cross-linked organic framework based on the Bi-MOF (CAU-17) can effectively tolerate the volume expansion and active sulfide loss, thus leading to excellent cycling stability (1059 mAh g −1 at 0.1 A g −1 after 100 cycles, 1108 mAh g −1 at 1.0 A g −1 after 500 cycles), and rate performance (478 mAh g −1 at 10 A g −1 ). This study offers a hopeful anode for highly efficient Li-ion storage, and a simple and low-energy-consuming strategy to improve the electrochemical performance of active materials.
研究领域:
材料科学
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电化学
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纳米技术
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能量存储
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yongfei Huang,Yongbin Zhang,Fangjun Huo,Jianbin Chao,Caixia Yin
Sulfur dioxide (SO 2 ), as the main member of reactive sulfur species (RSS), it is mainly produced in mitochondria and involved in a variety of activities at the cellular level. Excessive inhalation of SO 2 could cause respiratory tract damage, cardiovascular disease and even cancer. The mitochondrial and lysosomal as two important organelles, their interactions (fusion and contact) are important for maintaining eukaryotic homeostasis. Some study indicated that SO 2 is active in the above interaction process. In this work, benzopyranium salt unit was constructed as fluorophore I, where O + was the mitochondrial target site, and naphthalimide was linked to morpholine to construct fluorophore II, where morpholine was the lysosomal target group. Studies have shown that the probe has a good performance in targeting both mitochondria and lysosomes. And after the reaction with SO 2 , FRET was broken, resulting in red quenching, and green emitting, which made it can detect SO 2 with a ratiometric response. Cells cultured with nystatin showed decreased red and green fluorescence increased, indicating that the autophagy of mitochondria produced SO 2 . In addition, synthesized control reagents (targeting lysosomes alone and responding to SO 2 ) from no signal to gradually enhanced blue fluorescence, indicating that SO 2 produced by mitochondria is transferred to lysosomes. What's more, it could monitor the changes of SO 2 concentration under heat stroke. More importantly, it could quantitatively detect sulfite concentration in Yuba and crystal sugar.
研究领域:
生物化学
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细胞生物学
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分析化学
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毒理学
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食品科学
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DOI
高影响因子
ACS Sensors
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2020
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IF 7.333
Dan Qiao,Landie Li,Tangliang Shen,Jiejie Yang,Hao Chang,Xiao Liang,Lu Zhang,Qianqian Wang,Ning Liu,Wei Zhao,Luqing Shang
A customizable fluorescent probe platform that can be used to detect various bioactive analytes offers significant potential for engineering a wide range of bioprobes with diverse sensing and imaging functions. Here, we show a facile and innovative strategy for introducing cis-amino-proline as a carrier scaffold, which is appended with three specific functional groups: a target group, a water-soluble group, and fluorophores with triggers. The potency of the designed strategy could be customized to generate variable multifunctional fluorescent probes for detecting bioactive species of interest, including reactive oxygen species (ROS), reactive nitrogen species (RNS), reactive sulfur species (RSS), ROS/RSS, and even enzymes. We designed and synthesized five representative water-soluble and organelle-targeted compounds, PMB, PMN, PMD, PRB, and PME, with emission wavelengths of these fluorescent probes varying from blue to red (465, 480, 535, 550, 565, and 640 nm). This strategy could be exemplified by its application to develop a mitochondria-/lysosome-targeting multifunctional fluorescent probe capable of imaging bioactive species of interest in live cells and nude mice.
研究领域:
化学
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生物学
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生物化学
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分子生物学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Kuang He,Kaixuan Zheng,Li Wang,Kaihua Huang,Yong Wen,Yu Wang,Ning Hu,Jianwei Du,Lyumeng Ye,Lin Cheng
This study explores an innovative electrochemical strategy for the removal of the highly stable and toxic EDTA-Ni complex found in electroplating wastewater. Utilizing a cobalt-based single-atom catalyst (Co-NC) in an electro-enhanced system, we achieved significant activation of peroxydisulfate (PDS) for effective degradation of EDTA-Ni. Under optimal conditions of 40 mA current density and a pH range of 3–7, more than 97% of EDTA-Ni (1 mM) was successfully degraded within 90 min. Through detailed electrochemical experiments, we identified that atomic hydrogen (H*) played a crucial role in the indirect activation of PDS, facilitating the formation of reactive sulfate radicals (·SO4-). Computational analysis using density functional theory (DFT) confirmed that the H*-mediated reduction pathway had a notably low energy barrier (ΔGbs = 0.51 eV), making it the dominant activation mechanism. Gas chromatography-mass spectrometry (GC–MS) further revealed the primary degradation intermediates, providing insights into the breakdown process of EDTA-Ni. This research underscores the potential of Co-NC catalyst as a highly effective catalyst for treating persistent heavy metal complexes in advanced oxidation systems.
研究领域:
环境科学
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电化学
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催化
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废水处理
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2021
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IF 6.986
Jing Li,Xueqing Ma,Wei Yang,Chao Guo,Jingying Zhai,Xiaojiang Xie
The detection of SO2 and its derivatives is indispensable for monitoring atmospheric, water quality, and biological fluctuation of oxidative stress and metabolism of biothiols within native cellular contexts. In this article, the brush copolymer nanoreactors containing amine-terminated PDMS were used to encapsulate the fluorescent indicator C11-BDP, forming sulfite-sensitive nanoreactors (ssNRs). Surprisingly, the ssNRs were found to be highly selective to sulfite over a range of reactive oxygen/nitrogen/sulfur species and anions, which was not observed with freely dissolved indicators. The ssNRs showed a rapid response (t95 = 65 s), an excellent detection limit (0.7 μM), and a very high sensitivity (ca. 1000-fold ratiometric intensity change) to sulfite. For cellular studies, the ssNRs exhibited negligible toxicity and could be endocytosed into endosomes and lysosomes. Finally, the ssNRs allowed us to visualize the different responses of three different types of cells (pre-adipocytes, RAW264.7, and HeLa cells) to external stimuli in the culture media with sulfites and lipopolysaccharides.
研究领域:
分析化学
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生物医学工程
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细胞生物学
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环境科学
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产品关联
DOI
PubMed
高影响因子
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