STAR Protocols
·
2023
·
IF 0
Tiantian Feng,Xuran Chen,Shilei Zhao,Meng Cao,Lijuan Feng,Se Shi,Hui Wang,Tao Liu,Yihui Yuan,Ning Wang
Summary Detection of radioactive iodide ions (I – ) is important for protecting human beings from the hazards of radioactive pollution. Herein, we present a protocol for detecting I – using a zirconium(IV)-enhanced strategy. We describe steps for optimizing the I – detection approach, establishing standard curves, and finally applying the approach. The use of zirconium(IV) greatly improves the detection performance and endows this approach with an ultralow detection limit of 0.176 nM together with wide applicability in various aqueous environments. For complete details on the use and execution of this protocol, please refer to Feng et al. (2022). 1
研究领域:
分析化学
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环境科学
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DOI
PubMed
ChemistrySelect
·
2023
·Vol. 8
·期 5
·e202204363
·
IF 2.1
Tingting Xu,Panpan Xu,Guilin Xu,Mengyao Liu,Yinggui Zhu
Graphical In the study, Ru(bpy) 3 2+ was used as the luminophore, HEPES buffer was served as the co-reactant, and ATP was added to the system to amplify the luminous signal. It was speculated that ATP acts as an co-reaction accelerator to promote the oxidation of HEPES to HEPES + ⋅, more HEPES⋅ can be generated, which then reacts with oxidized Ru(bpy) 3 3+ to emit stronger ECL signals. Moreover, I - consumes ATP, Ru(bpy) 3 2+ , and HEPES, leading to a decrease in ECL signal. Adenosine triphosphate is an important biological molecule that provides energy and substrate for various cellular biochemical processes,it's ubiquitous in our lives. In this work, a novel electrochemiluminescence (ECL) sensor composed of Ru(bpy) 3 2+ , 2-[4-(2-hydroxyethyl)piperazin-1-yl] ethanesulfonic acid (HEPES) and adenosine 5’-triphosphate disodium salt (ATP) was developed for the first time. In this ECL system, Ru(bpy) 3 2+ was used as the luminophore, HEPES buffer was served as the co-reactant, and ATP was added to the system to amplify the luminous signal to investigate the ECL behavior. Through fluorescence spectroscopy, ECL spectroscopy, and cyclic voltammetry (CV), it can be hypothesized that the possible ECL mechanism is that ATP acts as an advanced co-reaction promoter to accelerate the oxidation of HEPES to HEPES + ⋅, more HEPES⋅ can be generated, which then reacts with oxidized Ru(bpy) 3 3+ to emit stronger ECL signals. Subsequently, the influence of the ATP concentrations and the CV scanning speed was investaged. Moreover, it was observed that I − could quench the ECL intensity, the linear relationship range of I − concentration is from 10 −3 to 10 −6 m , the limit of detection is 3.7×10 −8 m (signal/noise=3), therefore, a new, highly sensitive, and selective ECL approach for I − detection was created.
研究领域:
分析化学
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生物化学
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Gan Mingyu,Xu Yichen,Tan Jie,Wei Jieyin,Wang Ning,Wang Jianhua
A kind of nitrogen and sulfur co-doped CDs (N, S-CDs) was facilely synthesized using thiourea and citric acid as precursors, which established an “on–off-on” fluorescence probe to sequential detecting mercury and iodine ions inside water and biology samples. Under 360 nm excitation, CDs emit blue fluorescence with an optimal emission peak of 425 nm (on). The fluorescence of CDs experiences a significant quenching effect upon interaction with Hg 2+ ions due to the electron transfer between CDs and Hg 2+ . This quenching effect is subsequently recovered upon the addition of I − owing to the formation of complexes between Hg 2+ and I − . The probe exhibits high selectivity and sensitivity toward Hg 2+ and I − with broad linearity in the range of 5–50 μM and 15–60 μM, respectively, and a low detection limit of 14.336 nM and 38.213 nM, respectively. The constructed fluorescence probe N, S-CDs has been successfully applied to the detection of Hg 2+ and I − in water and biological samples with great recoveries. More importantly, the bioimaging study demonstrated that N, S-CDs are suitable for live monitoring in biological imaging scenarios of Hg 2+ and I − in living cells.
研究领域:
分析化学
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生物医学
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环境科学
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DOI
PubMed
高影响因子
LUMINESCENCE
·
2020
·Vol. 35
·期 7
·1036-1042
·
IF 1.855
Xiaoxiao Sun,Yuqi Zhao,Xiaoqian Cui,Ruxin Liu,Miao Yu,Qiang Fei,Qingwen Liu,Guodong Feng,Hongyan Shan,Yanfu Huan
A highly sensitive and selective colorimetric analysis method based on unmodified gold nanoparticles (AuNPs) to detect iodide ions (I − ) in solution in the presence of hexadecyl trimethyl ammonium bromide (CTAB) and mercury ions (Hg 2+ ) has been successfully developed. Hg 2+ could form a gold amalgam with AuNPs to protect AuNPs from CTAB-induced aggregation caused by the electrostatic attraction between CTAB and citrate ion-covered AuNPs. When a mixture of Hg 2+ and I − was added to the solution of AuNPs, the formation of the HgI 2 complex destroyed the protection of Hg 2+ for AuNPs, which led to the aggregation of AuNPs accompanied with the change in colour of the solution from red to grey black and decrease in the absorbance of AuNPs at 520 nm. There was a good linear relationship between A 520nm and I − concentration from 0 to 800 nM with a low limit of detection (LOD) of 4.2 nM. Furthermore, this simple and reliable colorimetric sensor has been applied successfully to the detection of I − in practical samples.
研究领域:
分析化学
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纳米技术
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环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
An Wang,Kanggen Zhou,Xuekai Zhang,Dingcan Zhou,Changhong Peng,Wei Chen
Large amounts of waste acids with high acidity and arsenic levels are produced during pyrometallurgy of nonferrous metal sulfide ores, in which the treatment of arsenic remains a problem. In this study, copper powder was used as a reducing agent and synergized with iodine ions to effectively remove arsenic from waste acids. The influences of stirring speed, copper powder particle size, sodium iodide/copper powder dosages, and reaction temperature on the removal efficiency of arsenic were investigated. The results showed almost complete removal of arsenic under the optimal conditions: 600 rpm stirring speed, copper powder particle size <15 μm, molar ratio I:As = 5, molar ratio Cu:As = 8, reaction temperature 40 °C, and reaction time 90 min. The kinetics studies indicated that arsenic removal was controlled by chemical reaction with apparent activation energy of 42.39 kJ·mol −1 . The morphological and structural characterizations of dearsenization residues showed surface of copper particles with double covering-layers. The interior covering-layer constituted the formation region of As(0), the phases of which were As and As-Cu intermetallic compounds, while the main product formed in exterior covering-layer was identified as CuI.
研究领域:
环境科学
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冶金工程
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DOI
高影响因子
ACS Applied Nano Materials
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2019
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IF 0
Weiru Dong,Congming Sun,Mingtai Sun,Hongwei Ge,Abdullah M. Asiri,Hadi M. Marwani,Runyan Ni,Suhua Wang
In this work, fluorescent copper nanoclusters (CuNCs) have been fabricated with ascorbic acid (AA) as reductant and polyvinyl pyrolidone (PVP) as scaffold in aqueous solution for the on-site detection of hypochlorous acid (HClO) with high sensitivity and selectivity. The CuNCs showed a specific fluorescence quenching toward HClO compared with other reactive oxygen species and ions that are found widely in the environment. The CuNCs also exhibited a good linear fluorescence quenching effect on HClO with a limit of detection at 55 nM. The mechanism has been investigated and was attributed to the oxidation of reduced Cu on the surface of CuNCs by HClO. Surprisingly, the fluorescence intensity of the probe was more responsive to HClO in the presence of excessive iodide ions (I–), with a lower detection limit of 19 nM. In acidic conditions, iodine (I2) was generated by HClO oxidation and subsequently reacted with Cu atoms on the surface of CuNCs to form cuprous iodide (CuI) precipitation. This resulted in surface defects on the CuNCs, which further significantly reduced the fluorescence intensity of the CuNCs. Under the influence of the reaction mechanism, the order of excessive I– and HClO addition affects the linear range and detection limit of the probe. Because these CuNCs have shown excellent performance as a fluorescent probe, they have been further successfully applied for real-time quantitative detection of HClO in practical samples, and I– can also be used as a “sensitizer” in HClO sensing.
研究领域:
分析化学
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生物化学
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产品关联
DOI
CEMENT & CONCRETE COMPOSITES
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2023
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IF 10.5
Jun Liu,Jiaying Liu,Lei Cheng,Jihua Zhu,Feng Xing,Xu Fan,Luping Tang
A novel modified Rapid Iodide Migration (RIM) test method was used to determine the influence of LC2 and FA on iodide ion diffusion coefficient of seawater and sea sand concrete (SSC). A 0.1 mol/L AgNO 3 solution was selected as the indicator to develop the colour of iodide in SSC, and a lowered mass fraction of NaI solution was selected to improve the RIM test. An X-Ray Fluorescence (XRF) test was employed to detect the feasibility of the modified RIM test. Additionally, the effects of the w/c ratio, the type and substitution rate of supplementary cementitious materials (SCMs), and the compressive strength on the iodide ion diffusion coefficient of SSC were studied using the modified RIM test. The results show that it is completely feasible to use AgNO 3 solution as an indicator. A lower mass fraction of NaI solution not only does not change the iodide ion diffusion coefficient of concrete but also reduces the test cost by 77.46% when using a 5 wt% NaI solution. Moreover, using SCMs to replace cement, liking fly ash (FA) and calcined clay and limestone (LC2), significantly reduces the iodide ion permeability of SSC, especially the use of LC2. Furthermore, there is a nonlinear relationship between the compressive strength and the iodide ion diffusion coefficient of SSC. This work is beneficial for the promotion of the application of modified RIM tests in studies of concrete contaminated with chloride and can provide a theoretical basis for the application of seawater and sea sand in engineering practices.
研究领域:
土木工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Zhou Lu-Wei,Chen Kai-Wei,Dai Xiao-Jun,Qiao Tai-Fei,Liu Hong-Yu,Lu Ji-Gen,Wang Peng,Gong Chun-Hui,Deng Shao-Gang,Xia Ming,Ni Fei,Tang Guo-Min,Zhang Yong-Bing,Yang Yi
Cu/Cu 2 O-modified activated carbon composites (Cu/Cu 2 O@AC) were synthesized via an one-step solvothermal method. The characterization results indicated that copper was uniformly dispersed on the surface of AC as nano-sized Cu 0 and Cu(I), which allowed Cu/Cu 2 O to make full contact with I − . The high specific surface area of Cu/Cu 2 O@AC and the affinity of Cu + for I − led to the equilibrium adsorption capacity within forty minutes. Additionally, the removal of trace I − (300 μg L −1 ) at pH = 3 by Cu/Cu 2 O@AC reached 96.4%. This work provides a promising application for the inexpensive and efficient capture of trace iodine from medical wastewater. Graphical abstract We synthesized Cu/Cu 2 O@AC composites for adsorption of iodide ions in solution.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2014
·
IF 2.129
Shangwen Chen,Pipi Wang,Chunmei Jia,Qiang Lin,Wenbing Yuan
A fluorescent Hg 2+ -selective chemosensor, 2,5-dimethoxybenzaldehyde thiosemicarbazone ( 1 ), was quantitatively prepared by grinding 2,5-dimethoxybenzaldehyde and thiosemicarbazide together in a ball mill for 15 min. The excitation and emission maxima of compound 1 are 347 and 450 nm, respectively. The reaction of this ligand with Hg 2+ was investigated by FT-IR, 1 H NMR, and fluorescence titration. Results show that the composition of the resulting Hg complex 1 -Hg is 2:1 1 :Hg, and that the S and imino N atoms serve as the binding sites of the ligand to the Hg 2+ ions. Coordination-assisted fluorescence quenching results show that compound 1 exhibits a highly selective fluorescence response to trace amounts of Hg 2+ in water. More importantly, the resulting complex 1 -Hg can be used as a turn-on fluorescence probe for I − at a detection limit of 8.4 × 10 −8 M. Thus, compound 1 is a relatively stable, sequential, cyclic fluorescent probe for Hg 2+ and I − .
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Mingyue Luo,Xin Xue,Kehui Zhang,Honghong Rao,Ruibin Qiang,Panpan Sun,Marcin Frankowski,Zhonghua Xue
Multi-signal sensors possess immense potential for point-of-care testing, yet their widespread adoption is hindered by reliance on complex nanomaterial synthesis or fragile enzymatic systems. Herein, we propose a “six-in-one” multi-mode sensor for rapid iodide ion (I - ) detection, leveraging only three commercially available reagents: chloroplatinic acid (H 2 PtCl 6 ), hexadecyl trimethylammonium bromide (CTAB), and 3,3’,5,5’-tetramethylbenzidine (TMB). The core innovation lies in a dynamic “on-off-on” oxidation triggered by target I - ions as follows: H 2 PtCl 6 with strong oxidative capacity directly oxidizes TMB to its two-electron product (TMB 2+ ) (“On” State). CTAB coordinates with H 2 PtCl 6 thereby blocking its surface and completely inhibiting TMB oxidation (“Off” State). I - selectively displaces CTAB via competitive coordination, partially restoring H 2 PtCl 6 ’s oxidation activity to generate the one-electron product (TMBox) (“Reactivation” State). Remarkably, the resulting TMBox exhibits six distinct signal outputs including visual and fluorescent color, absorbance, fluorescence, temperature, and electrical current. Compared to conventional single- or dual-mode methods, our six-mode approach improves reliability of detection results. This “magic cube” signals enables dual-mode qualitative analysis and four-mode quantitative detection, achieving a nanomolar-level detection limit for I - detection. Critically, multi-mode sensor operates via one-step mixing without requiring nanomaterials, enzymes, or specialized equipment. We further demonstrate its utility in detecting I - in biological (urine, serum), food (iodized salt) and environmental (Yellow River water, tap water) samples with recovery rates of 96.3% - 110.0%. Statistical analysis demonstrated excellent reproducibility with relative standard deviations <3.1% across repeated measurements. This work redefines the paradigm of multi-mode sensing, offering a cost-effective, field-deployable solution for environmental monitoring and clinical diagnostics.
研究领域:
分析化学
·
医学诊断
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Cuicui Li,Haocheng Li,Xiuyun Ren,Liang Hu,Jiaojiao Deng,Jinhan Mo,Xiaoqi Sun,Guohua Chen,Xiaoliang Yu
The multielectron conversion electrochemistry of I–/I0/I+ enables high specific capacity and voltage in zinc–iodine batteries. Unfortunately, the I+ ions are thermodynamically unstable and are highly susceptible to hydrolysis. Current endeavors primarily focus on exploring interhalogen chemistry to activate the I0/I+ couple. However, the practical working voltage is below the theoretical level. In this study, the I0/I+ redox couple is fully activated, and I+ is efficiently stabilized by a chelation agent of cost-effective urea in the conventional aqueous electrolyte. A record-high plateau voltage of 1.8 V vs Zn/Zn2+ has been realized. Theoretical calculations combined with spectroscopy studies and electrochemical tests reveal that the coordination between the electron-deficient I+ and the electron-rich O and N atoms in urea molecules is thermodynamically favorable for I0/I+ conversion and inhibits the self-disproportionation of I+, which in turn promotes rapid kinetics and excellent reversibility of I0/I+. Moreover, urea decreases the water activity in the electrolyte by forming hydrogen bonds to further suppress the hydrolysis of I+. Accordingly, a high specific capacity of 419 mAh g–1 is delivered at 1C, and 147 mAh g–1 capacity is retained after 10,000 cycles at 5C. This work offers effective insights into formulating halogen-free electrolytes for high-performance aqueous zinc–iodine batteries.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 333
·期 1
·545-556
·
IF 1.6
Tang Haoming,Zhang Mingzhu,Ran Fengya,Sun Shiyong,Golubev Yevgeny Aleksandrovich,Zhao Qian,Lin Sen,Duan Tao,Kotova Olga Borisovna
The Cu 2 O/Cu modified shungite (ShC) absorbent (Cu 2 O/Cu-ShC) was synthesized by hydrothermal method, benefiting from the mineral backbone and Cu 2 O/Cu particles, Cu 2 O/Cu-ShC can remove ~ 96% of I − within 60 min, the batch experiments showed that the I − adsorption process follows pseudo-second-order model and Langmuir model with maximum adsorption capacity of 10.99 mg/g. The high binding affinity between Cu + and I − contributes effective removal of I − and excellent selectivity at high concentrations of competing ions. This work highlights the feasibility of Cu 2 O/Cu-ShC for the radioactive iodine separation, and provides a promising sorbent material for large-scale purification of radioactive iodine anions in wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）