MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 4
·1-8
·
IF 5.479
Wen Zhuoqi,Song Shanliang,Hu Tantan,Wang Chuanxi,Qu Fengdong,Wang Pei,Yang Minghui
A series of dual-emission fluorescent probes was prepared from copper nanoclusters (Cu NCs) and carbon dots (CDs). They show two emission peaks (blue at 469 nm and red at 622 nm) when photoexcited at 365 nm. Upon exposure to sulfide, the Cu NCs will be deteriorated because they react with sulfide to form CuS. This results in the quenching of the red fluorescence of the Cu NCs, while the blue fluorescence of the CDs remains constant. Thus, the color of the nanocomposite changes from red to blue. The ratio of the fluorescences at the two wavelengths decreases linearly in the 2–10 ppb (26–128 nM) sulfide concentration range, and the limit of detection is 0.33 ppb (4.3 nM). The nanocomposite also was placed in an agar gel and then incorporated into a paper strip for fluorometric monitoring of gaseous hydrogen sulfide.
Schematic presentation of the synthesis of Cu NCs (copper nanoclusters)-CDs (carbon dots) dual-emission nano-assembly, Cu NCs-CDs-agar fluorescent film and their application for the detection of sulfide and H 2 S.
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高影响因子
ANALYST
·
2018
·Vol. 143
·期 8
·1881-1889
·
IF 3.864
Linlin Yang,Jun Zhao,Xinling Yu,Ruilong Zhang,Guangmei Han,Renyong Liu,Zhengjie Liu,Tingting Zhao,Ming-Yong Han,Zhongping Zhang
Hydrogen sulfide (H2S) is a key signaling molecule in the cytoprotection, vascular mediation and neurotransmission of living organisms. In-depth understanding of its production, trafficking, and transformation in cells is very important in the way H2S mediates cellular signal transductions and organism functions; it also motivates the development of H2S probes and imaging technologies. A fundamental challenge, however, is how to engineer probes with sensitivity and cellular penetrability that allow detection of spontaneous production of H2S in the entire cell space and live animals. Here, we report a rationally designed molecular switch capable of accessing all intracellular compartments, including the nucleus, lysosomes and mitochondria, for H2S detection. Our probe comprised three functional domains (H2S sensing, fluorescence, and biomembrane penetration), could enter almost all cell types readily, and exhibit a rapid and ultrasensitive response to H2S (≤120-fold fluorescence enhancement) for the dynamic mapping of spontaneously produced H2S as well as its distribution in the whole cell. In particular, the probe traversed blood/tissue/cell barriers to achieve mapping of endogenous H2S in metabolic organs of a live Danio rerio (zebrafish). These results open-up exciting opportunities to investigate H2S physiology and H2S-related diseases.
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Nano Today
·
2022
·
IF 18.962
Kai Yuan,Kai Huang,Yiqi Yang,Yixuan Lin,Yihao Liu,Fupeng Li,Yakun Liang,Haishuang Chang,Yuhui Chen,Tingting Tang,Shengbing Yang
Increasing evidence has emphasized the pivotal role of antibiotic tolerance in the evolution of antibiotic resistance , refractory infection and infection recurrence. Moreover, satisfactory treatment of infection relies highly on early, precise detection and subsequent timely therapeutic interventions. In this study, the phenotype of increased production of H 2 S in antibiotic-tolerant Staphylococcus aureus ( S. aureus ) was identified and proven to be essential to the maintenance of antibiotic tolerance. Hence, a photoacoustic probe for detecting infection as well as an antibiotic enhancer targeting bacterial endogenous H 2 S to eradicate antibiotic-tolerant bacteria was successfully developed based on a bismuth metal-organic framework (Bi-MOF). Bi-MOF achieved early in situ and precise photoacoustic imaging of infection by generating Bi 2 S 3 inside bacteria. Moreover, Bi-MOF enhanced the eradication efficacy of methicillin against tolerant S. aureus by downregulating the intracellular H 2 S levels. Overall, Bi-MOF offers a promising diagnostic tool for early, precise infection diagnosis and a therapeutic strategy for tolerant bacteria-related refractory infection.
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Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Ganchang Lei,Zhangjia Fan,Yufei Hou,Fangyi Liu,Shipping Wang,Lijuan Shen,Yingying Zhan,Lilong Jiang
Construction of metal-free carbon-based materials for efficient sulfur resource recovery in pollutant H 2 S is very critical for both applied environmental catalysis and fundamental material exploration. Herein, we report a template-free hydrothermal method to prepare hierarchical nitrogen-doped mesoporous carbon (HNMCs) materials with abundant nitrogen sites and large BET surface area. The representative HNMC-800 achieves a H 2 S conversion of ∼100% and sulfur selectivity of ∼95% at 150 °C in H 2 S selective oxidation. Moreover, HNMCs catalysts are resistant to sulfur poisoning, displaying good catalytic durability, with no significant loss of sulfur yield in the run of 80 h, outperforming the pure active carbon, g-C 3 N 4 , and commercial Fe 2 O 3 . This work provides the possibility of utilizing hierarchical nitrogen-doped carbon materials as metal-free catalysts for the selective oxidation of H 2 S.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiayu Feng,Lijuan Jia,Fei Wang,Xin Sun,Ping Ning,Chi Wang,Yuan Li,Kai Li
In this work, we report a novel urea-modified copper-based material (XUrea@Cu) obtained by directly calcinating a mixture of urea and copper nitrate. This material enables the efficient purification of H 2 S under dry and anaerobic conditions. The performance test results showed that the H 2 S capacity of the optimal adsorbent (2Urea@Cu) could reach 364.2 mg(H 2 S)∙g sorbent -1 , which is much superior to those of other adsorbents in the literature. Further study demonstrates that the ultra-desulfurization performance of 2Urea@Cu is mainly attributed to the extensive alkaline site, the high concentrations of active oxygen, and the abundance of oxygen vacancy; which are quite effective for capturing H 2 S (acidic and strong reducibility). Interestingly, the deactivation adsorbent (De-2Urea@Cu) is mainly composed of high-purity CuS, which means that the Urea@Cu adsorbent can simultaneously achieve efficient purification of H 2 S and recovery of sulfur resources since CuS is a valuable product. In addition, in-situ FT-IR and theoretical calculation results indicate that H 2 S molecules dissociate on the CuO(1 1 1) surface by stepwise dehydrogenation, while S combines with adjacent Cu to form CuS. The consumption of active components (CuO) and the accumulation of reaction products (CuS) are the primary reasons for the deactivation of adsorbents. Considering the simple preparation process, low cost, and excellent H 2 S adsorption activity, these urea-modified copper-based materials are very promising H 2 S adsorbents.
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RSC Advances
·
2015
·Vol. 5
·期 111
·91206-91212
·
IF 3.84
Wen Long Li,Hong Yan Zou,Jing Lan,Qiang Wang,Yuan Fang Li,Cheng Zhi Huang
Hollow nanostructures have been diversely applied in many fields and efforts have been made to develop their various synthesis methodologies. Herein, homogeneous hollow Cu2−xSeyS1−y/reduced graphene oxide (rGO) nanocomposites were prepared for the first time via a facile and green aqueous chemical approach using H2S gas bubble templates as soft templates at room temperature. It is found that 2D hexagonal Cu2−xSeyS1−y nanosheets assemble around the gas–liquid interface of H2S bubbles to form hollow nanospheres on the rGO sheets, wherein rGO sheets as molecular templates play a critical role in maintaining the structural integrity of single-crystal hollow Cu2−xSeyS1−y nanospheres. Increasing the S content in the precursors, i.e., increasing the amount of H2S bubbles, both the diameter and chalcogen composition (S/Se molar ratio) of hollow Cu2−xSeyS1−y/rGO nanocomposites gradually increase. The near-infrared (NIR) localized surface plasmon resonance (LSPR) in Cu2−xSeyS1−y/rGO nanocomposites, arising from the free carriers (holes) in Cu2−xSeyS1−y, gets red shifts with increasing the S content, due to the higher carrier mass and assembly degree of Cu2−xSeyS1−y.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jun Zhu,Jun Chen,Jianan Chen,Jicheng Zhou,Wentao Xu
Direct decomposition of H 2 S into H 2 and S is an attractive alternative to the Claus process, because CO x -free H 2 and S can be simultaneously recovered from an abundant and toxic waste gas, which has huge social economic and ecological environmental benefits. However, it is still a great challenge to achieve the direct H 2 S decomposition reaction with high efficiency due to the thermal equilibrium limitation. Herein, a core-shell structured Mo x C@ZrO 2 was developed as novel microwave catalyst for microwave catalytic H 2 S decomposition. More specifically, the H 2 S conversion over Mo x C@ZrO 2 catalyst is as high as 99.9% at 650 °C, which immensely surpasses the H 2 S equilibrium conversion (6.1% at 650 °C). This study provides an effective strategy for the design of highly active microwave catalysts, and supplies a strategy for efficiently catalytic decomposition of H 2 S waste and recovering high-value hydrogen and sulfur at lower reaction temperatures.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huiyu Su,Chaofan Ma,Kechen Zhou,Chaoqi Zhu,Lu Tang,Lingfei Luo,Xiaoxia Wang,Dawen Zeng
All-solid-state batteries (ASSBs) have the advantages of wide temperature range and high energy density. However, Improper storage, transportation and use of ASSBs may produce cracks, leading the electrolytes exposed and reacting with moisture in air to generate toxic and harmful H 2 S, which seriously endangers the life and property safety of operators. Therefore, the design of an ultra-sensitive H 2 S gas sensor is expected to achieve safety warning of ASSBs. High-entropy oxides (HEOs) possess multiple cations and inherent oxygen vacancies making it’s possible for performance customization. Spinel HEOs have the advantages of low cost, simple synthesis, stable structure, and have been partially developed for gas sensing, catalysis, heat-resistant and other fields. In addition, the introduction of high-valence metals can further adjust the electronic structure, activate lattice oxygen, and bring significant performance improvements. In this work, (CoCrMnMoZn) 3 O 4 with high-valence Mo was synthesized and its morphology, structure and composition were analyzed. Through gas sensing tests, it proved to be an ideal candidate for H 2 S sensors due to its high sensitivity (1.03 to 10 ppb H 2 S), good selectivity, long-term and humidity stability. Simulation experiments show the applicability of the sensor for failure detection of ASSBs with multiple temperatures in the whole relative humidity range. Diffuse reflaxions infrared fourier transformations spectroscopy (DRIFTS) showed H 2 S was adsorbed at the Mo sites to form Mo-S bonds and decomposed into SO 2 and H 2 O. The study provides a promising approach for the safety warning of ASSBs.
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ACS Applied Bio Materials
·
2020
·
IF 0
Xiaojun He,Ziman Zheng,Feifan Zhang,Chuchu Xu,Wei Xu,Lisong Ye,Xiaoshuai Sun,Zhan Zhou,Jianliang Shen
Bioactive molecules play a vital role in the process of regulating the redox balance in the intracellular environment, especially in maintaining the function of organelles. To explore the association and function of bioactive molecules in organelles, it is essential to develop a chemosensor tool that uses multiresponse fluorescence signals to distinguish between and track two related bioactive molecules in organelles. However, the development of sensors with multiresponse functions is still a challenging task. Herein, we present a unique and practical single chemosensor (Mito-CTC) that can monitor HClO (as an oxidative substance) and H2S (as a reductive substance) in mitochondria (organelle targeting) with multiresponse fluorescence signals. The response of the sensor to HClO and H2S changes from red to green and blue channel emission simultaneously, respectively, thereby providing a specific signal response to reductive/oxidative substances in the mitochondria. Using a single chemosensor, we have realized multichannel bioimaging of the exogenous and endogenous HClO and H2S in cellular mitochondria. Additionally, the excellent properties of the sensor Mito-CTC can be used to reveal the relationship between HClO and H2S in mitochondria. Meanwhile, Mito-CTC has been endowed with the ability to image in bacteria and zebrafish attributed to the good permeability and low cytotoxicity. Expectantly, drug-induced liver injury (DILI) caused by fluoxetine (an antidepressant drug) and the degree of drug-induced toxicity to the liver were evaluated using Mito-CTC through discriminating and imaging HClO, indicating that Mito-CTC has the potential function of evaluating the toxicity of the drug to the liver.
研究领域:
生物化学
·
医学影像
·
药理学
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Jun-Tao Cao,Wen-Sheng Zhang,Xiao-Long Fu,Hui Wang,Shu-Hui Ma,Yan-Ming Liu
A high-efficient chemiluminescence (CL) platform for highly selective and sensitive H 2 S detection was constructed on the basis of the quenching effect of S 2 − on the copper ion modified graphitic carbon nitride nanosheets (Cu 2+ -g-C 3 N 4 NSs) enhanced luminol-H 2 O 2 system. Cu 2+ -g-C 3 N 4 NSs with horseradish peroxidase-like catalytic activity were prepared and provide a great improvement for luminol-H 2 O 2 system. The presence of S 2 − induced the formation of CuS precipitate on g-C 3 N 4 NSs surface. The precipitate can block the catalytic Cu 2+ sites on the g-C 3 N 4 NSs surface, resulting in a great CL decrease of CL system. Based on such a mechanism, a simple, highly selective and sensitive CL biosensor for H 2 S detection was designed. Under the optimized conditions, luminol-H 2 O 2 -Cu 2+ -g-C 3 N 4 NSs system gave a decrease of CL intensity with the Na 2 S concentration increasing. The CL biosensor is in a linear range of 10.0 pM–50.0 nM and the detection limit for detecting Na 2 S is as low as 2.0 pM. Moreover, the method here has enjoyed a successful application for determining H 2 S in human plasma samples and the recovery is between 95.7% and 110.0%.
研究领域:
分析化学
·
生物医学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Guilin Zhou,Xiaodong Zhang,Xin-Long Ni
A water-soluble terpyridine-based cationic fluorescent probe ( SP - TPy ) was synthesized, which emerged with pH-dependent amphiphilicity, resulting in self-assembly and disassembly in aqueous media with the aggregation-induced emission (AIE) property. In neutral water (pH 7.4), a moderate sensing response to Hg 2+ ions was given by the self-assembly of SP - TPy . However, in acidic aqueous media, the monomer of SP - TPy not only appeared to be highly selective and sensitive for Hg 2+ ions, but also displayed highly efficient removal of Hg 2+ ions from solution by rapid precipitation, which was attributed to the coordination-triggered reassembly of SP - TPy . The removal efficiency of SP-TPy f or Hg 2+ was found to be over 99%. Further study indicated that the precipitates were composed of various polyhedral porous frameworks, a property that was further used to adsorb H 2 S gas to form HgS complexes with higher uptake capacities. In addition, SP - TPy can be efficiently regenerated and recycled using a simple treatment with acidic water after adsorption of the H 2 S gas.
研究领域:
化学
·
环境科学
·
材料科学
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Wei Wu,Jingyu Long,Yuanjun Guo,Xiaotao Zu,Sean Li,Xia Xiang
A surface acoustic wave (SAW) H 2 S gas sensor based on CuO-TiO 2 p-n heterojunction film was designed and fabricated. The sensor exhibits high sensitivity to H 2 S due to the significant current response of CuO-TiO 2 film to H 2 S gas and the appropriate work point of SAW sensor based on CuO-TiO 2 composite film. The linearity change for sensor frequency shift is strongly associated with the location of work point when the H 2 S concentration increases from 1 to 300 ppm. In addition, the porosity of CuO-TiO 2 film is beneficial to the efficient adsorption for H 2 S, leading to the higher frequency shift of the sensor. The SAW sensor also shows good selectivity and stability to H 2 S with stable frequency shift under different humidity levels.
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