CRYSTENGCOMM
·
2025
·
IF 2.6
Feng Jiao,Jinzhao Huang,Zehui Liu,Yu Zhang,Xiaolong Deng,Ke Zhang,Guixin Zhao
In this paper, sodium sulfite (Na₂SO₃) and cerium nitrate (Ce(NO₃)₃) were added in the hydrothermal method for the preparation of FeCo LDH, and needle-like Ce-FeCo LDH (NS) catalysts were grown in situ on a carbon cloth.The additions of Na₂SO₃ and Ce(NO₃)₃ regulated the electron transfer of the metal cations in the LDH, and significantly improved the performance of the catalysts. The prepared Ce-FeCo LDH (NS) catalysts exhibited excellent electrochemical properties. The overpotential of OER was 221 mV at a current density of 10 mA/cm² in 1 M KOH. The surface structure and catalytic performance of the catalysts were maintained well after 100 h stability test. This study provides a new idea for the improvement and design of OER catalysts based on FeCo LDH, which is an important reference for clean energy research.
研究领域:
材料科学
·
清洁能源研究
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Haoran Xv,Qian Zhang,Thiquynhxuan Le,Duclenh Phan,Libo Zhang
Ammonium persulfate has been proven to be effective in purifying thiosulfate (S 2 O 3 2− ) and sulfite (SO 3 2− ) impurities in desulfurization solutions. However, the sole use of ammonium persulfate as an oxidant faces the challenge of high oxidant consumption. In this study, a novel approach was proposed to enhance the oxidation efficiency of ammonium persulfate on sulfur-containing ions through ultrasonic activation. The results indicate that this technology has the advantages of high purification efficiency and low usage of ammonium persulfate. Specifically, the concentrations of S 2 O 3 2− and SO 3 2− decreased from 16.26 g/L and 38.30 g/L to 1.09 g/L and 8.89 g/L, respectively, meeting the actual production requirements; and the usage of ammonium persulfate could be reduced by 10–30 g per liter of solution compared with the case of ammonium persulfate alone. The introduction of ultrasound increased the generation of free radicals (SO 4 · − and ·OH), enhancing their oxidative capacity. The contribution of free radicals to the oxidation of S₂O₃ 2− and SO₃ 2− increased from 11.1 % and 9.8 % to 50.0 % and 25.8 %, respectively. This study reveals that the ultrasonic activated ammonium persulfate is expected to achieve efficient purification of the desulfurization mother liquor and reduce the addition of ammonium persulfate.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2019
·Vol. 3
·期 6
·1052-1061
·
IF 0
Tingting Lin,Xing Su,Kai Wang,Minjie Li,Hongwei Guo,Lulu Liu,Bo Zou,Yu-Mo Zhang,Yifei Liu,Sean Xiao-An Zhang
Stimuli-responsive fluorescent materials which can change their optical signal outputs upon changes in ambient physical or chemical parameters exhibit great application potential for comprehensive environmental monitoring. In this article, a new aggregation-induced emission fluorescent switch, 1',3′,3′-trimethyl-5′-(4-(1,2,2-triphenylvinyl)phenyl)spiro[chromene-2,2′-indoline]-6-carbonitrile (TPE-Sp-CN), was synthesized and applied in the quantitative detection of three parameters, namely pH value, sulfite anion and hydrostatic pressure, with different molecular states. According to the analysis of the optical spectra, TPE-Sp-CN can distinguish water pH values from 0 to 4, the detection limit of sulfite anion is 1.04 ppm, and the pressure sensing range is 1 atm to 6 GPa with the sensing sensitivity of a 9.876 nm GPa−1 shift in the PL spectrum. Furthermore, TPE-Sp-CN can quantitatively sense all three parameters with good linear relationships, which is rarely reported. Also, it is promising to use TPE-Sp-CN as an indicator to monitor the environment or disasters that are related to the above parameters, such as harmful geological activities.
研究领域:
材料科学
·
环境监测
·
化学传感
✓ 已验证
产品关联
DOI
RSC Advances
·
2016
·Vol. 6
·期 88
·85529-85537
·
IF 3.289
Sheng Chen,Chao Ma,Mao-Sen Yuan,Wenji Wang,Dong-En Wang,Shu-Wei Chen,Jinyi Wang
Hydrogen sulfide (H2S) and sulfite (SO32−) are two important sulfur-containing species that play different and important roles in industrial and biological processes. Accordingly, the development of efficient methods for simple, rapid, sensitive and selective monitoring of H2S and SO32− is of the utmost importance in both environmental and biological sciences. In this study, we developed a new dual functional probe NIR-DNP for discriminative detection of H2S and SO32−. This probe can sense H2S and SO32− via two different approaches, a significant near-infrared fluorescence enhancement and color change from purple to cyan induced by H2S as well as a visible color change from purple to colorless caused by SO32−. The detection limits of the probe NIR-DNP for H2S and SO32− in aqueous solutions were 36.53 nM and 33.33 nM, respectively. Competitive experiments demonstrated that the probe NIR-DNP had a high fluorescence selectivity for H2S and excellent colorimetric selectivity for SO32− over other analytes. The sensing mechanism of the probe toward H2S and SO32− was based on the H2S-induced thiolysis of dinitrophenyl ether and SO32−-induced nucleophilic addition, respectively. Further investigation showed that the probe NIR-DNP could be used to develop an easy-to-prepare and easy-to-detect paper-based test strip for cheap and effective detection of SO32−. Also, the probe NIR-DNP has the potential to image exogenous and endogenous H2S in living cells.
研究领域:
环境科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Lei Fang,Huishan Chen,Pubin Liao,Yiyi Ma,Yuman Lv
Sulfite (SO 3 2− ) has garnered widespread attention for its ability to produce free radicals and environmentally friendly properties. In this work, the mechanism and feasibility of the microwave (MW) activated sulfite system for the removal of tetracycline hydrochloride (TCH) were investigated. The removal efficiency, reaction kinetics, and influencing factors of the MW/SO 3 2− were explored. The identification of active substances and the reaction mechanism of the MW/SO 3 2− system were further analyzed. The results showed that MW could activate sulfite effectively and the reaction process followed the pseudo-first-order kinetic. MW/SO 3 2− achieved a 97.8 % degradation of TCH within 15 min. The influencing factors experiments showed that increasing the initial pH promoted the degradation of TCH. According to the results of EPR and free radical quenching experiments, the degradation of TCH by the MW/SO 3 2− system had both free radical (SO 3 · − , SO 5 · − , SO 4 · − , and O 2 · − ) and non-free radical pathway ( 1 O 2 ) reactions. The degradation pathways of TCH mainly included hydroxylation, removal reaction, ring-opening reaction, and oxidation reaction. Evaluation with the T.E.S.T system found that the ecological risk of TCH was reduced after MW/SO 3 2− treatment. The use of microwaves as sulfite activation method was shown to be a new alternative to promote the rapid degradation of emerging organic pollutants.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuan Jiao,Bingyan Wang,Yifang Gao,Xiaona Liu,Shaomin Shuang,Chuan Dong,Wenjun Li,Tianwei Qian
A new type of red photoluminescent carbon dots (R-CDs) with high quantum yield of 46.9% was favorably developed by introducing the luminophore of resazurin into the framework. The obtained R-CDs exhibit excitation-independent behavior, advantageous dispersion and outstanding optical performance. It is worth noting that the proposed R-CDs demonstrate a particular response to S 2 O 5 2- over other competitive species accompanied by a naked-eye color change from red to orange. Fluorescence quenching of R-CDs is determined to be S 2 O 5 2- concentrations dependence with ultra-fast response time and low detection limit. The as-developed R-CDs is further employed in building a smartphone imaging colorimetry platform for portable recognition of S 2 O 5 2- in real samples with considerable accuracy. Furthermore, the specially prepared R-CDs also display a significant fluorescence enhancement behavior with the increase of pH in the linear range of 5.4–6.2 with a pKa of 5.86. These findings may offer a distinctive strategy for the development of long-wavelength emission carbon dots and help to expand their application in food safety inspection.
研究领域:
分析化学
·
食品安全
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Xiaoshuo Zhang,Ziyi Zhang,Youyu Cao,Wenzhi Tang,Zhonghong Li
Excessive sulfite (SO32–) causes serious human health problems, making its detection highly valuable. In this work, a colorimetric sensor was presented for the detection of SO32– on the basis of Co–Mn mixed metal oxide (CoMn MMO) nanorods. CoMn MMOs composed of CoMn2O4 were uniformly dispersed among Co3O4 by calcining Co6(CO3)2(OH)8·H2O@CoMn2O4 nanorods in air, which had intrinsic oxidase-like activity. The synergistic introduction of CoMn2O4 promoted electron transfer in Co3O4, which not only prevented the aggregation problem but also increased the active sites, and the catalytic activity of the resulting CoMn MMO nanoenzyme was significantly enhanced. The obtained nanocomposites could catalyze the oxidation of the chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxTMB with a quite low Michaelis–Menten constant (Km) of 0.042 mM and a quick Vmax of 0.85 × 10–8 M s–1 by generating a superoxide radical (·O2–). Based on the inhibitory effect of SO32– on the CoMn MMOs-TMB system, the proposed method allowed for SO32– detection with the linear concentration range from 1.56 to 15.58 μM and a limit of detection of 62.38 nM under optimal conditions. Combined with a smartphone chromaticity analysis app, we designed a portable and disposable agarose hydrogel test kit using the proposed system, which realized the on-site semiquantitative and visual detection of SO32– in food samples.
研究领域:
分析化学
·
材料科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Chong Duan,Jun-Feng Zhang,Yubo Hu,Lintao Zeng,Dongdong Su,Guang-Ming Bao
Sodium sulfite (Na 2 SO 3 ) is widely used as a food additive , but the excessive residue of SO 3 2− in food can cause irritative effects and damages to the human body. In this study, we reported a novel near-infrared (NIR) fluorescent probe ( DCMQ ) for visual detection of SO 3 2− based on a chromogenic reaction. The probe can quantitatively determine SO 3 2− with high specificity and sensitivity, fast response (<50 s) as well as a low detection limit (31.6 nM). A 1,4-Michael addition reaction was proposed for the sensing mechanism of this probe, which was confirmed by 1 H NMR and HR-MS spectra. The probe has been successfully utilized to determine SO 3 2− in food with good recovery, remarkable chromogenic effect and NIR fluorescence turn-on response. Furthermore, the probe has been prepared as a reagent kit for instant on-site visual detection of SO 3 2− in food. Therefore, this probe has great potential application for the detection of SO 3 2− in food.
研究领域:
分析化学
·
食品安全
·
生物医学工程
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Guangda Xu,Ye Sun,Yao Zhang,Lixin Xia
The conversion of p -aminothiophenol (PATP) or p -nitrothiophenol (PNTP) to p,p ′-dimercaptoazobenzene (DMAB) has been used as model reactions to study plasmon-catalyzed reaction on nanoparticles. Herein, we report the conversion of PNTP to DMAB which is triggered by SO 3 2− ions on gold nanoparticles (AuNPs) for the first time. With the addition of SO 3 2− , the Raman peaks at 1139, 1392, 1437 cm −1 appears, which indicates the formation of DMAB. The experiment results suggested that the synergistic effect of AuNPs and SO 3 2− promoted the conversion of PNTP to DMAB. Besides, the proposed catalysis system is high selectivity to SO 3 2− ions, which provides a new detection route to SO 3 2− ions in the future. More importantly, the possible reaction mechanism has been put forward which is helpful to understand the surface plasmon-assisted catalytic reduction of PNTP on the surface of SERS substrate.
研究领域:
化学
·
纳米科学
·
催化反应
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Qiao Yang,Xuhao Wu,Xuankai Huang,Shuang Liao,Kaijie Liang,Xueang Yu,Kuan Li,Chunyi Zhi,Haiyan Zhang,Na Li
Penetrating into the inner surface of porous metal-oxide nanostructures to encapsulate the conductive layer is an efficient but challenging route to exploit high-performance lithium-ion battery electrodes. Furthermore, if the bonding force on the interface between the core and shell was enhanced, the structure and cyclic performance of the electrodes will be greatly improved. Here, vertically aligned interpenetrating encapsulation composite nanoframeworks were assembled from Cl–/SO32–-codoped poly(3,4-ethylenedioxythiophene) (PEDOT) that interpenetrated and coated on porous Fe2O3 nanoframeworks (PEDOT-IE-Fe2O3) via a one-step Fe3+-induced in situ growth strategy. Compared with conventional wrapped structures and methods, the special PEDOT-IE-Fe2O3 encapsulation structure has many advantages. First, the codoped PEDOT shell ensures a high conductive network in the composites (100.6 S cm–1) and provides interpenetrating fast ion/electron transport pathways on the inner and outer surface of a single composite unit. Additionally, the pores inside offer void space to buffer the volume expansion of the nanoscale frameworks in cycling processes. In particular, the formation of Fe–S bonds on the organic–inorganic interface (between PEDOT shell and Fe2O3 core) enhances the structural stability and further extends the cell cycle life. The PEDOT-IE-Fe2O3 was applied as lithium-ion battery anodes, which exhibit excellent lithium storage capability and cycling stability. The capacity was as high as 1096 mA h g–1 at 0.05 A g–1, excellent rate capability, and a long and stable cycle process with a capacity retention of 89% (791 mA h g–1) after 1000 cycles (2 A g–1). We demonstrate a novel interpenetrating encapsulation structure to highly enhance the electrochemical performance of metal-oxide nanostructures, especially the cycling stability, and provide new insights for designing electrochemical energy storage materials.
研究领域:
材料科学
·
能源存储技术
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yifei Xing,Song Shen,Zhenguang Wang
Direct fluorescence detection of amoxicillin (AMX) is highly desired for food and environment safety but remains a formidable challenge because of its low conjugation degree and stabilization effects on excitons. In this work, we proposed a direct fluorometry for AMX through modulating its fluorescence properties by utilizing sulfur nanodots (S-dots) as nanoreactors. S-dots provided both confined carrier and reactants (polyethylene glycol (PEG) and sulfite ions) to modulate the fluorescence properties of AMX, achieving a 277-fold increase on the fluorescence intensities. PEG and SO 3 2- interacted with AMX through both covalent and hydrogen bounds, which stabilized the excited states, decreased the chances of nonradiative path and activated the radiative decay. The ultrasmall sized S-dots also provided confinement carries for promoting the reactivity between AMX and surface function groups. Quantitative detection of AMX in commercial milk samples was realized through direct recording the fluorescence signals, achieving a limit of detection of 159 nM. The reported results provided a new idea to design fluorescence assays for extremely weak emissive molecules, showing great potential in food safety analysis, environmental and healthy monitoring.
研究领域:
分析化学
·
纳米技术
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Xiao Qian,Li Wanbin,Xie Shujie,Wang Li,Tang Chuyang Y.
Chlorinated organic pollutants widely exist in aquatic environments and threaten human health. Catalytic approaches are proposed for their elimination, but sluggish degradation, incomplete dechlorination, and catalyst recovery remain extremely challenging. Here we show efficient dechlorination using ferrous oxide/graphene oxide catalytic membranes with strong nanoconfinement effects. Catalytic membranes are constructed by graphene oxide nanosheets with integrated ultrafine and monodisperse sub-5 nm nanoparticles through simple in-situ growth and filtration assembly. Density function theory simulation reveals that nanoconfinement effects remarkably reduce energy barriers of rate-limiting steps for iron (III)-sulfite complex dissociation to sulfite radicals and dichloroacetic acid degradation to monochloroacetic acid. Combining with nanoconfinement effects of enhancing reactants accessibility to catalysts and increasing catalyst-to-reactant ratios, the membrane achieves ultrafast and complete dechlorination of 180 µg L −1 dichloroacetic acid to chloride, with nearly 100% reduction efficiency within a record-breaking 3.9 ms, accompanied by six to seven orders of magnitude greater first-order rate constant of 51,000 min −1 than current catalysis. Meanwhile, the membranes exhibit quadrupled permeance of 48.6 L m −2 h −1 bar −1 as GO ones, because nanoparticles adjust membrane structure, chemical composition, and interlayer space. Moreover, the membranes show excellent stability over 20 cycles and universality for chlorinated organic pollutants at environmental concentrations.
研究领域:
环境科学
·
催化
·
纳米技术
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）