ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Zhuorong Fan,Xiaojing Xu,Jixian Luo,Zimeng Lei,Wenjuan Dong,Wenting Liang,Shengmei Song,Xiaojuan Gong
Background Red-emitting carbon dots (R-CDs), characterized by their long-wavelength fluorescence in the red spectral region, offer significant advantages as fluorescent probes due to their capacity to effectively mitigate light scattering and suppress autofluorescence interference from biological matrices. This inherent optical property positions them as one of the most promising candidates for high-contrast bioimaging and sensitive sensing applications. Herein, a novel type of highly luminescent R-CDs was synthesized via a tailored precursor design and doping strategy. Their potential as advanced fluorescent probes was systematically evaluated, focusing on their exceptional optical properties, photostability, and responsiveness to specific substances. Results The emitting of R-CDs exhibits strong pH sensitivity in the range of 1.5-4.0, enabling monitoring of extremely acidic environments. Additionally, R-CDs were employed as probes to develop a multi-mode sensing platform integrating ratiometric fluorescence, ratiometric colorimetry, and smartphone-based imaging for Ag + detection. Fluorescence mode: Ag + selectively quenches the red emission of R-CDs, while yellow emission of Cu-CDs remains stable. Quantification detection relies on the I 624 /I 550 ratio, with a linear range of 0–185.3 μM and LOD of 0.266 μM. Colorimetry mode: Ag + -induced aggregation of the R-CDs weakened the original absorption band and generates a new peak at 680 nm, enabling detection via the A 680 /A 610 ratio with a linear range of 0–208.0 μM and LOD of 0.398 μM. Moreover, the R-CDs solution undergoes a distinct color change under exposure to Ag + ; by leveraging smartphone-based color recognition, a portable visual sensing platform has been successfully constructed. Significance In this work, the synthesis of R-CDs provides a strategic reference for developing high-performance, multicolor-tunable, and function-oriented doped CDs. The multi-mode sensing platform achieves functional complementarity and data cross-validation, thereby improving the reliability, anti-interference capability and on-site applicability of detection. Analytical robustness is further enhanced by the ratiometric strategy's built-in reference signal, which effectively compensates for instrumental, environmental, and operational variables. This design strategy features universal principles and demonstrates strong potential across a wide range of applications.
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Journal of Physical Chemistry C
·
2026
·Vol. 130
·期 31
·10958-10966
·
IF 3.4
Li Wen-Tao,Zhang Cong-Cong,Deng Zheng-Dang,Feng Jing-Ru,Huang Fan,Ren Lin-Hao,Ding Si-Jing,Liu Xiao-Li,Ma Liang
Semiconductor-metal
heterostructured nanomaterials, featuring efficient
electron-transfer pathways, excellent light-harvesting capability,
and effective separation of photogenerated charge carriers, have emerged
as highly promising candidates for photocatalytic hydrogen production.
In this study, a thin Ag transitional layer was first deposited onto
the surface of Au NBPs, followed by growth to construct heterostructures
featuring pairwise interfacial contact among Au, Pt, and CdS. Morphological
and compositional characterizations reveal that Pt is located at the
tips of the Au NBPs and CdS grows at the midsection, resulting in
a unique heterostructure characterized by remarkably distinctive pairwise
contacts. Experiments show that the Au-Pt-CdS heterostructures exhibit
hydrogen-production efficiencies about 8 times higher than that of
Au-CdS heterostructures and approximately 223 times higher than that
of Au-Pt heterostructures, and also demonstrates excellent photocatalytic
stability. Owing to the work function difference between the metal
and the semiconductor, this heterostructure generates unique band
bending and an intrinsic electric field at the interface, effectively
facilitating the separation and multipath directional transport of
photogenerated charge carriers, thereby significantly enhancing the
rate of photocatalytic hydrogen evolution. Our study provides valuable
guidance for the rational design of high-efficiency semiconductor-metal
heterostructured photocatalysts and holds significant promise for
advancing low-carbon energy solutions and promoting sustainable societal
development.
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Inorganics
·
2026
·Vol. 14
·期 3
·88
·
IF 3.4
Naifeng Chen,Yi Li,Chenxia Gao,Chao Xue,Shuang Liu,Jinghang Li,Xi Cao,Kuilin Lv,Yuguang Lv
This study systematically investigated the characterization of 2Fe-CDs/12Mn-CeO2composites and the colorimetric sensing properties of H2O2, glucose (Glu), and glutathione (GSH). The morphology, structure, and optical properties of the 2Fe-CDs/12Mn-CeO2composite were analyzed in detail by XRD, FT-IR, SEM, TEM, XPS, and Raman spectroscopy, and its formation was supported by multiple complementary characterization techniques. The catalytic efficiency (kcat/Km) of the nanozyme is 152-fold higher than natural HRP under optimal conditions and remains 59-fold higher even after temperature normalization to 25 °C. In the colorimetric sensing experiments, the detection limits of Fe-CDs/Mn-CeO2were 0.21 μM, 2.7 μM, and 0.63 μM for H2O2, Glu, and GSH, respectively. Rapid and accurate determination of the concentrations of these biomolecules can be achieved by observing the color changes after Fe-CDs/Mn-CeO2reaction with the objects to be measured. The experimental results show that Fe-CDs/Mn-CeO2have high sensitivity and selectivity for H2O2, Glu, and GSH, which provides a solid theoretical and experimental basis for the application of Fe-CDs/Mn-CeO2in the field of biosensing and medical diagnosis.
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Molecular Catalysis
·
2024
·
IF 3.9
Yu Chen,Ming-Yu Qi,Zi-Rong Tang
Integrating selective organic transformation and hydrogen (H 2 ) evolution in one photoredox reaction system is one of the most sustainable and promising approaches to efficiently produce solar fuels and chemicals by simultaneously utilizing photogenerated electrons and holes. Herein, through the cation-exchange engineering method, the nanoleaf-like Pd/CdS composites are gingerly fabricated for visible-light-driven receptor-free dehydrogenation of 1,2,3,4-tetrahydroisoquinoline (THIQ) to 3,4-dihydroisoquinoline (DHIQ) and H 2 under ambient conditions. The optimized electronic structure endows Pd/CdS with a narrow band gap and suitable energy band positions, thus facilitating the light harvesting as well as the separation and transfer of photoexcited charge carriers. Consequently, the Pd/CdS exhibits significantly improved photoredox activity compared to bare CdS . In-situ Fourier-transform infrared spectroscopy and electron paramagnetic resonance spectroscopy track the progression of reaction intermediates during such a dual-functional photoredox-catalyzed system, revealing that the carbon-centered radical is the key reaction intermediate in this reaction process. It is anticipated that this work would guide the rational utilization of CdS-based materials to enable simultaneous photochemical coupling of organic transformation and H 2 evolution.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Xiaojie Song,Xiufang Wang,Weiwei Dong,Qishu Qu,Haichen Wang,Fan Yang
Solar-to-chemical energy conversion via heterogeneous photocatalysis is one of the effective approaches to tackle the growing environmental and energy challenges. Homogeneously dispersed silver nanoparticles (Ag NPs) and cadmium sulfide nanoparticles (CdS NPs) with average particle size not>20 nm were fabricated on the surface of titanium dioxide nanotubes (TNTs) (Ag/CdS/TNTs) with the help of sodium dodecyl benzene sulfonate (SDBS). Herein, more surface active sites are created on the surface of nanocomposites. The experimental results demonstrate that the photocurrent intensity of the nanocomposites obviously increased, which effectively improves the photocatalytic activity. The results of photocatalytic experiments indicated that using triethanolamine (TEOA) and acetonitrile (MeCN) as sacrificial agents, the nanocomposites afford the CO yield from CO 2 (1455.6 μmol‧g −1 ‧h −1 ). Besides, Ag/CdS/TNTs nanocomposites displayed the H 2 evolution rate of 3700.57 μmol‧g −1 ‧h −1 , which was twice as much as pure TiO 2 NPs. The increase in the photocatalytic ability of the nanocomposites is basically attributed to the three materials formation S-scheme heterojunction which reduce the recombination probability of the photo-induced electrons and holes and thus enhances the photocatalytic activitys. Ultimately, a photocatalytic reaction mechanism is proposed for Ag/CdS/TNTs nanocomposites in the reduction of CO 2 .
研究领域:
材料科学
·
环境科学
·
能源科学
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ANALYST
·
2022
·Vol. 147
·期 14
·3258-3265
·
IF 5.227
Siyu Chen,Shu-Na Yun,Yujiao Liu,Ruijin Yu,Qin Tu,Jinyi Wang,Mao-Sen Yuan
The abuse of pesticides has introduced a large number of residues in soil and drinking water, which can then enter the food chain and the human body. Monitoring pesticide residues and developing simple and fast detection systems for pesticide residues is urgently needed. In this study, we presented one-pot prepared CdS fluorescent quantum dots (QDs) and explored their sensing application for organic pesticides. The CdS QDs can sensitively and selectively detect three different pesticides, dichlorvos (DDVP), paraquat, and glufosinate-ammonium, through different fluorescence responses. Paraquat can effectively quench the fluorescence of the QDs and DDVP can cause remarkable fluorescent enhancement. Glufosinate-ammonium can induce both 150 nm fluorescent blueshifting and 30-fold fluorescent enhancement. The probe exhibited low detection limits for the three pesticides: 1.44 μM for paraquat, 0.23 mM for DDVP, and 49.8 μM for glufosinate-ammonium. Furthermore, based on the results, we utilized the powerful functions of smartphones to establish a concentration-gray value standard curve through RGB values and gray values to realize the qualitative detection and quantitative analysis of DDVP. It is believed that this work presents a new platform for the simultaneous detection of multiple pesticides using a single QDs probe. The present on-site method using a smartphone is of great potential for water monitoring in rural areas.
研究领域:
分析化学
·
环境科学
·
材料科学
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 39
·395602
·
IF 3.551
Hongchao Geng,Ning Jiang,Chenyi Li,Xingqi Zhu,Yan Qiao,Qingyun Cai
A novel visible light-driven photocatalyst (represented as Mn-CdS/ZCISe/CIS/TiO2) for the passivation of E. coli was prepared with TiO2 nanowires as support and using CuInS2 (CIS) and ZnCuInSe (ZCISe) quantum dots (QDs), as well as Mn-doped CdS (Mn-CdS) nanoparticles (NPs) as sensitizers. The use of CIS and ZCISe QDs and Mn-CdS NPs extends the light harvest region to visible light. The photoelectric conversion efficiency was consequently improved, with a photocurrent density of 12.5 mA cm−2, about 60 times that of pure TiO2 nanowires. The germicidal efficiency of the photocatalyst was assessed by passivation of E. coli, 96% bacteria in 50 ml 105 colony forming units (CFU) ml−1 solution were killed within 50 min. Besides the high efficiency, the composite has good stability and satisfactory recycling performance. The antibiotic mechanism was also performed by using photoluminescence and a scavenging agent of different active matter, revealing that the photo-generated holes play a major role in the sterilization process.
研究领域:
微生物学
·
材料科学
·
环境科学
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ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Jiye Zhang,Yonghao Wang,Jian Jin,Jun Zhang,Zhang Lin,Feng Huang,Jiaguo Yu
CdS/g-C3N4 core/shell nanowires with different g-C3N4 contents were fabricated by a combined solvothermal and chemisorption method and characterized by X-ray powder diffraction, scanning electronic microscopy, transmission electron microscopy, and UV–vis diffuse reflection spectroscopy. The photocatalytic hydrogen-production activities of these samples were evaluated using Na2S and Na2SO3 as sacrificial reagents in water under visible-light illumination (λ ≥ 420 nm). The results show that after a spontaneous adsorption process g-C3N4 is successfully coated on CdS nanowires with intimate contact and can significantly improve the photocatalytic hydrogen-production rate of CdS nanowires, which reaches an optimal value of up to 4152 μmol h–1 g–1 at the g-C3N4 content of 2 wt %. More importantly, g-C3N4 coating can substantially reinforce the photostability of CdS nanowires even in a nonsacrificial system. The synergic effect between g-C3N4 and CdS, which can effectively accelerate the charge separation and transfer corrosive holes from CdS to robust C3N4, was proposed to be responsible for the enhancement of the photocatalytic activity and photostability. The possible conditions necessary for the synergic effect to work in a CdS/g-C3N4 core/shell configuration is also discussed.
研究领域:
材料科学
·
光催化
·
可再生能源
·
纳米技术
·
氢气制备
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高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 190
·期 1
·1-9
·
IF 6.408
Fan Yunfeng,Liu Zhimin,Wang Jie,Cui Chen,Hu Leqian
A novel electrochemiluminescence (ECL) aptasensor for the determination of lincomycin (LIN) was developed based on CdS QDs/carboxylated g-C 3 N 4 (CdS QDs/C-g-C 3 N 4 ). CdS QDs/C-g-C 3 N 4 served as the substrate of the aptasensor, and then CdS QDs/C-g-C 3 N 4 -modified electrode was incubated with aptamer DNA (Apt-DNA). When the non-specific sites of the electrode surface was blocked by 6-mercaptohexanol, the ferrocene-labeled probe (Fer-DNA) was assembled onto the electrode surface through base complementation with Apt-DNA. In the absence of LIN, the ECL signal was quenched effectively by Fer-DNA and a decreased ECL emission (off state) was acquired. On the contrary, LIN was specifically bond with Apt-DNA, and Fer-DNA was detached from the aptasensor surface because of the deformation of Apt-DNA, resulting in an effectively enhanced ECL signal (on state). The constructed ECL aptasensor exhibited a wide detection range for LIN determination (0.05 ng mL −1 –100 μg mL −1 ) with a low detection limit (0.02 ng mL −1 ). Importantly, the proposed ECL aptasensor showed outstanding accuracy and specificity for LIN determination, and also provided a potential strategy for other antibiotic determinations. Graphical Abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Linjia Li,Rui Zhang,Yanhong Lin,Dejun Wang,Tengfeng Xie
The exploitation of morphological engineering strategies enables the design of semiconductor-based photocatalysts with a precision that significantly enhances their photocatalytic activity. In this study, a paradigm has been provided that embeds plasmonic nanostructures within the bulk of the semiconductor, which demonstrates an improvement in interfacial charge transfer and separation. It involves a distinct core-double shelled Au@carbon dots@CdS hybrid, exhibiting excellent photocatalytic H 2 generation under the visible light radiation. The interfacial engineering between the plasmonic nucleus and the semiconductor shell has been performed by the incorporation of carbon dots as faster charge channels. The effective driving force for plasmon-enhanced bulk charge separation of semiconductors and the unhindered interfacial charge transmission derived from carbon dots have been demonstrated by the use of steady state surface photovoltage (SPV) and transient state surface photovoltage (TPV) methods, as well as some intrinsic kinetics information of interfacial photoexcited charge carriers transfer processes.
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Analytical Methods
·
2023
·Vol. 15
·期 7
·969-978
·
IF 3.1
Zuxing Zhang,Mingqing Li,Liying Zhai,Jiahui Wu,Li Li
A ternary nanocomposite photoelectrode composed of cadmium sulfide (CdS), polyaniline (PANI), and bismuth vanadate (BiVO4) was successfully designed by combining cyclic voltammetry (CV) with electrochemical deposition and high-temperature calcination. The first synthesized CdS/PANI/BiVO4 composite was used as a photoelectrochemical (PEC) monitoring platform for glutathione (GSH). The ternary CdS/PANI/BiVO4 nanocomposites exhibited higher PEC activity, which was attributed to the accelerated electron transfer by the loading of CdS and PANI, which enables the material surface to better adsorb the electrons separated by GSH, thereby oxidizing it into GSSH. The photoanodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy, and photoelectrochemical experiments. Under the optimal experimental conditions, the BiVO4 electrode modified with CdS and PANI exhibited a linear response in the concentration range of 0.1–20 μM with a sensitivity of 0.669 μA mM−1 cm−2 and a detection limit of 40 nM. Moreover, the PEC sensor exhibits good reproducibility and long-term stability. In summary, the designed materials have excellent electrochemical properties, which make them ideal candidates for PEC detection of GSH.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 12
·127515
·
IF 4.386
Wenrui Zhao,Beibei Wang,Xueping Ji,Kai Kang,Bing Wang,Lin Wang,Jujie Ren
Herein, a novel electrochemiluminescence (ECL) sensor was developed using a dual signal amplification mechanism based on a typical HKUST-1 metal-organic framework, [Cu3(BTC)2(H2O)3, BTC=1,3,5-benzene tricarboxylate], CdS quantum dots (QDs) and multi-walled carbon nanotubes (MWCNTs) for ultrasensitive determination of catechol. HKUST-1 not only has a dispersion effect to carry more CdS QDs for enhancing stability, but also acts as effective catalyzer to accelerate the transformation of persulfate ion (S2O82−) for generating more sulfate radical anions (SO4•−), therefore amplifying the signal of the ECL sensor. Meanwhile, the introduction of MWCNTs to the ECL process could promote the electron transfer rate and accelerate the kinetics of the electro-catalytic reaction attributing to its stronger conductivity, achieving dual-amplifying effect, which could obviously increase the sensitivity of the ECL sensor. The proposed sensor displayed a wide linear range of 1 × 10−7 − 1 × 10−3 M and a low detection limit of 3.8 × 10−8 M with excellent stability, high repeatability and outstanding anti-interference ability under the optimal conditions. Impressively, the sensor possessed commendable feedback when detecting catechol in real samples. Therefore, this research provided a new strategy combining the advantages of MOFs, QDs and MWCNTs materials for phenolic pollutants detection.
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