MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 11
·729
·
IF 5.4
Wang Mengjun,Huang Rong,Yang Xinwen,Zeng Minghao,Wang Huizhen,Luo Xiaojun
A ratiometric fluorescence probe was developed by integrating a covalent organic framework (TP-BDB-COF) with N-doped quantum dots (N-CDs) encapsulated in zeolitic imidazolate framework-8 (N-CDs@ZIF-8), enabling highly sensitive and selective detection of hypochlorite (ClO⁻) in aqueous environments. The yellow-orange-emissive TP-BDB-COF, synthesized by the condensation of 2,4,6-triformylphloroglucinol (TP) and 3,3’-dimethyl-[1,1’-biphenyl]-4,4’-diamine (BDB), exhibited specific fluorescence quenching at 570 nm upon interaction with ClO⁻. The blue-emissive N-CDs@ZIF-8 served as a stable reference signal at 430 nm, enabling self-calibration via the ratiometric signal (F 430 /F 570 ). This dual-signal strategy significantly improved detection accuracy and reliability. This sensor exhibited a broad linear fluorometric response range of 0.05 to 200 µM for ClO⁻, with an exceptionally low detection limit of 22 nM. Moreover, its practical applicability was validated through analysis of real water samples, yielding satisfactory spike recoveries between 98.53% and 101.30%. This approach not only offers a robust method for monitoring ClO⁻ in complex matrices but also provides a versatile framework for constructing high-performance ratiometric sensors. Graphical abstract
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Small
·
2024
·
IF 13
Qiaona Liu,Xin Han,An Qian,Jiayu Qian,Xin Pu,Lei Ye,Jinshan Zhan,Jian Zhang,Qiang Yang,Jichang Liu
Building heterojunctions and exposing more catalytic active sites are effective strategies to enhance the photocatalytic hydrogen evolution activity. Herein, TiO 2 nanosheets are oxidized in situ on Ru-loaded MXene as carriers and subsequently loaded with uniform 2D CdS via hydrothermal method to obtain 2D Ru/Ti 3 C 2 -TiO 2 /CdS composite photocatalysts that integrate heterojunctions and cocatalysts. The formation of heterojunction between CdS and TiO 2 is conducive to promoting the separation and transfer of photogenerated charges, simultaneously, Ru/Ti 3 C 2 with the fully exposed Ru and Ti 3 C 2 can act as effective active sites of photocatalytic hydrogen production reaction. The composite photocatalyst exhibits an improved hydrogen production rate with 5479 µmol g −1 h −1 , which is 5, 3, and four times more than that of pristine CdS, CdS loaded Ti 3 C 2 -TiO 2 and CdS loaded Ru-TiO 2 respectively. The results reveal that the notable enhancement in performance can primarily be ascribed to the introduction of the TiO 2 /CdS heterojunction and the efficient cocatalysts of Ru/Ti 3 C 2 . Moreover, the 2D Ti 3 C 2 with high conductivity as carriers can increase charge transfer, and its 2D structure can serve as a template for growing 2D photocatalysts with higher activity. The interface engineering with multiple interfaces can offer novel insights for the advancement of efficient hydrogen evolution reaction catalysts.
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Biosensors-Basel
·
2024
·Vol. 14
·期 12
·586
·
IF 4.9
Xiaowei Fan,Guping Zhang,Xiaodi Li,Yao Wang,Yi Wang,Shilei Hao,Defang Liu
In this study, we have proposed an electrochemiluminescence (ECL) signal amplification system which is based on two-dimensional (2D) flower-like CdS@Co/Mo-MOF composites as a co-reaction accelerator of the g-C3N4/S2O82−system for ultrasensitive detection of chlorpromazine hydrochloride (CPH). Specifically, the 2D flower-like Co/Mo-MOF with mesoporous alleviated the aggregation of CdS NPs while simultaneously fostering reactant-active site contact and improving the reactant–product transport rate. This allowed the material to act as a novel co-reaction accelerator, speeding up the transformation of the S2O82−into SO4•−and enhancing the cathodic ECL emission of g-C3N4. Moreover, the signal probe which was synthesized by coupling the 2D CdS@Co/Mo-MOF and graphitic carbon nitride (g-C3N4) achieved the generation of SO4•−in situ and reduced energy loss. The results confirmed that the ECL signal was enhanced 6.2-fold and stabilized by CdS@Co/Mo-MOF. Based on the extremely strong quenching effect of chlorpromazine hydrochloride (CPH) on this system, a “signal-off” type sensor was constructed. The sensor demonstrated excellent sensitivity and linear response to CPH concentrations ranging from 1 pmol L−1to 100 μmol L−1, with a low detection limit of 0.4 pmol L−1(S/N = 3).
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yangbo Ma,Miao Fa,Yihui Zhang,Liuying Xiong,Xiying Li,Shuaishuai Zhou,Wei Chen,Liqun Mao
Precious metals loading strategy is an effective method to increase the reactivity of CdS based photocatalysts for hydrogen evolution from water splitting under visible light. The key problem of such strategy is the affecting mechanism, which determined by the composition, species and structure of the loaded metals. In this study, AgPd bimetallic nanoclusters (Ag x Pd y ) were prepared and then loaded onto the surface of snowflake-like CdS and the affecting mechanism was qualitatively and quantatively investigated through both instrumental analysis and computational method. The composition and structure of synthesized samples were examined through XRD, TEM, and XPS, by which the successful synthesis of AgPd bimetallic nanocluster alloys with an average particle size of approximately 3 nm were confirmed. Further, the hydrogen evolution performance of Ag x Pd y /CdS was tested under visible light and the prepared AgPd 3 /CdS achieved a hydrogen evolution rate of 73.93 mmol h −1 g −1 , which is a 28 % improvement over Pd/CdS and a 381 % improvement over CdS, with an AQY of 44.68 % at 420 nm. The photoelectrochemical tests (LSV, I-T, EIS, PL, and TR-PL), ESR, and TRPL were applied to qualitatively demonstrate the function of Ag x Pd y nano-cocatalyst, and the testing results indicated that the cocatalyst significantly enhances the separation and transfer efficiency of photoinduced electrons, while further lowering the hydrogen evolution reaction energy barrier. Based on that, affecting mechanism was further determined through DFT simulation quantitatively. The prediction results indicated that the unique nanoclusters structure of AgPd 3 contribute with the high work function and low d band center position increase the transfer efficiency of the photoinduced charge carriers. This study quantitatively revealed the relationship among compostion, structure and reactivity of the photocatalysts, provided an method to investigate the affecting mechanism of bimetallic hydrogen evolution photocatalysts and contributed to the advancement of renewable energy development.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Libo Yu,Zhen Li,Weiqiang Qiao,Junke Wang,Chengshuang Zhao
Light harvesting plays crucial role for high photovoltaic performance of quantum dots sensitized solar cell (QDSSC). However, there are still issues need to be tackled, such as enlarging light response range and enhancing light scattering capability. In this work, TiO 2 eggshell hollow microspheres (EHMS) were synthesized by carbonaceous microspheres (CMS) template method and co-sensitized by CdS/CdSe/PbS quantum dots (QDs) for application in QDSSC . Compared with QDSSC based on TiO 2 nanoparticles (NP) and TiO 2 hollow microspheres (HMS), the TiO 2 EHMS based QDSSC showed a remarkable increase of short-circuit current density (J sc ) to 24.81 mA cm −2 with a power conversion efficiency (PCE) of 4.07 %. Photoelectrochemical analysis of QDSSC indicate that CdS/CdSe/PbS QDs can enlarge the light response range, and the TiO 2 EHMS improve the light scattering, leading to the improvement of light harvesting efficiency. Charges dynamics tests results proved that a larger charges recombination resistance at photoanode/electrolyte interface and longer electron lifetime can be achieved with TiO 2 EHMS, contributing to the boost of J sc . The presented study introduces a simple strategy for researchers interested in designing photoanode for various photoelectrochemical applications.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Yanqing Wang,Mengzhu Li,Dongchen Guo,Min Fan,Jingjun Zhang,Juan Guo,Hongzhan Dong,Chengwu Shi
Antimony selenosulfide (Sb 2 (S,Se) 3 ) solar cells hold significant promise for sustainable photovoltaic technology due to their adjustable band gap, high absorption coefficient and good stability. In terms of device operation, the transfer of electrons from the Sb 2 (S,Se) 3 layer to the electron transport layer (ETL) plays a crucial role in improving the photovoltaic performance of solar cells. Until now, high-efficiency Sb 2 (S,Se) 3 solar cells have typically employed cadmium sulfide (CdS) as the ETL. However, inadequate interface contact between the CdS and the Sb 2 (S,Se) 3 layer often results in severe interface recombination, and the parasitic light absorption of CdS restricts the short-circuit current density ( J sc ). Therefore, the development of high-quality CdS film along with reduction of cadmium element usage remains an import issue for the Sb 2 (S,Se) 3 solar cells. Herein, the poly(acrylic acid)-modified tin oxide (PAA-SnO 2 )/CdS double ETLs are introduced to improve the quality of both the CdS film and Sb 2 (S,Se) 3 film, while also strengthening the interface contact between CdS and Sb 2 (S,Se) 3 . The power conversion efficiency of the corresponding solar cells increases from 7.45% in the control device to 8.15% in the modified device. This work provides a simple PAA-modified SnO 2 -assisted CdS ETL strategy to improve the interface of CdS/Sb 2 (S,Se) 3 , thereby achieving efficient and stable Sb 2 (S,Se) 3 solar cells.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-11
·
IF 5.3
Lu Juan,Li Chao,Guo Yanjia,Feng Yongjia,Song Yujia,Li Ruidan,Tian Li,Wang Jing
Loofah sponge-like carbon nanofibers (LF-Co,N/CNFs) were utilized as a carrier for Ru(bpy) 3 2+ , and then combined with CdS to create a novel solid-state electrochemiluminescence sensor capable of detecting trace amounts of fenpropathrin. LF-Co,N/CNFs, obtained through the high-temperature pyrolysis of ZIF-67 coaxial electrospinning fibers, were characterized by a loofah-like morphology and exhibited a significant specific surface area and porosity. Apart from serving as a carrier, LF-Co,N/CNFs also functioned as a luminescence accelerator, enhancing the system's luminescence efficiency by facilitating electron transmission and reducing the transmission distance. The inclusion of CdS in the luminescence reaction, in conjunction with Ru(bpy) 3 2+ , further boosted the sensor's luminescence signal. The resulting sensor demonstrated a satisfactory signal, with fenpropathrin causing significant quenching of the ECL signal. Under optimized conditions, a linear relationship between the signal quench value and fenpropathrin concentration in the range 1 × 10 –12 to 1 × 10 –6 M was observed, with a detection limit of 3.3 × 10 –13 M (S/N = 3). This developed sensor is characterized by its simplicity, sensitivity, and successful application in detecting fenpropathrin in real samples. The study not only presents a straightforward detection platform for fenpropathrin but also introduces new avenues for the rapid determination of various food contaminants, thereby expanding the utility of carbon fibers in electrochemiluminescence sensors. Graphical Abstract
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Weiwei He,Dan Xu,Hailin Zhu
Nowadays, the discharge of wastewater causes serious environmental pollution, affecting the living environment and the health of human beings. So the problem of wastewater treatment is imminent. In this context, the PVDF/SMA/CdS membranes had oil-water separation and dye degradation effects were prepared by using non-solvent phase transition and in-situ deposition methods. Its separation efficiency reached more than 98%, and the oil-water removal rate was at more than 90% after 5 times of recycling. Under visible light irradiation, it could completely degrade methylene blue solution (MB, 10 mg·L -1 , pH=3) within 20 min, cochineal solution (Ponceau 4R) within 12 min, and chromium blue-black R (EBR) solution within 6 min, and the degradation rate was at more than 95% after 5 cycles. Therefore, the PVDF/SMA/CdS membrane can effectively treat wastewater. This study opens up a promising avenue for wastewater treatment technology with high potential for application.
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JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Xiao Dai,Xianhong Zhu,Shiyu Li,Ze Wu,Chenyang Zhao,Xun Gao,Longshan Zhao
Some illegal businesses often add antibiotics such as sulfonamides to expand the functional range of lipstick. However, the abuse of antibiotics will lead to serious adverse reactions and increase the drug resistance of bacteria. To ensure the safety of lipstick, it is necessary to monitor the antibiotic content, which urgently needs to develop an efficient and highly sensitive analytical method. In this study, a magnetic solid-phase extraction (MSPE) method was developed using a composite adsorbent based on carboxylated multi-walled carbon nanotubes (c-MMWCNT) and carbon dots (CDs) for sample pretreatment. A magnetic dispersive solid-phase extraction coupled with high-performance liquid chromatography method was established using silanized serine‑modified carbon dots (Sil-Ser-OCDs) as the sorbent for the determination of sulfapyridine (SPY) and sulfamethazine (SMT). Key extraction parameters including adsorbent dosage, extraction time, and pH were optimized using response surface methodology. The optimal extraction conditions were determined to be an adsorbent dosage of 72 mg, extraction time of 4.5 min, and pH 6.0. Under the optimal conditions, the recoveries of SPY and SMT were in the range of 88.0%-93.4%, and the RSD values of intra-day and inter-day precision were under 4.2% and 5.4%, respectively, indicating that the approach has excellent accuracy and precision.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Erqiao Chen,Zhihao Chen,Zhongting Liu,Mingzhu Zhou,Bisheng Li,Renjie Li,Liguo Shen,Yang Jiao,Hongjun Lin,Yanchao Xu
Membrane fouling and the inherent permeability–selectivity trade-off represent persistent dual challenges constraining the long-term performance and practical application of nanofiltration (NF) membranes. Saline wastewater and dye-containing effluents are typical industrial wastewaters with large discharge volumes, where high salt contents and complex organic components exacerbate fouling and intensify the permeability–selectivity dilemma of conventional NF membranes. In this work, we report a novel magnetic-field-assisted interfacial polymerization strategy to fabricate photocatalytic thin-film nanocomposite (M-TFN) membranes with enhanced antifouling and self-cleaning performance. A multifunctional nanostructure, Fe 3 O 4 @CdS@CQDs, was synthesized via a one-pot hydrothermal method and introduced into the aqueous phase of interfacial polymerization. Under an external magnetic field, the nanoparticles were guided toward the water–organic interface, inducing the formation of a wrinkled polyamide surface with increased roughness, hydrophilicity, and specific surface area. Compared with the conventional TFC (6.1 L·m −2 ·h −1 ·bar −1 , 98.2 % Na 2 SO 4 rejection) and TFN membranes (15.7 m −2 ·h −1 ·bar −1 , 99.0 % Na 2 SO 4 rejection), the resulting M-TFN membranes exhibited a significantly improved water flux of 22.5 m −2 ·h −1 ·bar −1 while maintaining a high Na 2 SO 4 rejection of 99.2 %, thereby effectively overcoming the permeability–selectivity trade-off. Moreover, the membranes demonstrated excellent dye rejection (>95 % for multiple organic dyes) and outstanding photocatalytic self-cleaning behavior under visible light, achieving a flux recovery rate of 98.7 % after five fouling–cleaning cycles. This study provides new insights into the synergistic use of magnetic guidance and photocatalytic enhancement to design next-generation NF membranes for advanced wastewater treatment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jiming Zeng,Hanyu Shi,Qian Wang,Chengchen Wang,Yukun Wang,YaXin Zhou,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic water splitting for hydrogen production and the degradation of organic pollutants are regarded as promising strategies to address the current energy crisis and environmental issues. As a wide-bandgap metal oxide, TiO 2 is characterized by low catalytic activity and a narrow range of light absorption when used alone, whereas its combination with narrow-bandgap semiconductors has been shown to lead to a significant enhancement in catalytic performance. In this study, CdS–TiO 2 composites were synthesized via a ball-milling method, after which Pt–Pd nanoparticles were deposited by photodeposition. The noble metals were found to interact with CdS and TiO 2 respectively, while a synergistic catalytic effect between Pd and Pt was also observed. The photocatalytic efficiency was further extended by the formation of CdS–TiO 2 heterojunctions, resulting in a significantly enhanced hydrogen production rate of 4656.99 μmol h −1 g cat −1 in the ternary system. Moreover, the composite demonstrated significantly enhanced performance in the photocatalytic reduction of 4-NP, The Pt–Pd NPs/CdS-Vo-TiO 2 photocatalyst achieved a 95.2 % conversion rate for 4-NP within 2 min, also demonstrating high photocatalytic activity.
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高影响因子
Catalysts
·
2024
·Vol. 14
·期 3
·183
·
IF 3.8
Jiarong Ma,Run Zhou,Yu Tu,Ruixin Ma,Daimei Chen,Hao Ding
Ni3Si2O5(OH)4rods (NS) were synthesized via a hydrothermal method, employing natural wollastonite as a template. The hierarchical Ni3Si2O5(OH)4rods exhibited vertically oriented nanosheets, resulting in a substantial increase in the specific surface area (from 2.24 m2/g to 178.4 m2/g). Subsequently, a CdS/Ni3Si2O5(OH)4composite photocatalyst (CdS/NS) was prepared using a chemical deposition method. CdS was uniformly loaded onto the surface of the Ni3Si2O5(OH)4nanosheets, successfully forming a heterojunction with Ni3Si2O5(OH)4. The CdS/NS photocatalyst in the presence of lactic acid as a sacrificial agent demonstrated an impressive H2production rate of 4.05 mmol h−1g−1, around 40 times higher than pure CdS. The photocorrosion of CdS was effectively solved after loading. After four cycles, the performance of CdS/NS remained stable, showing the potential for sustainable applications. After photoexcitation, electrons moved from Ni3Si2O5(OH)4to the valence band of CdS, where they interacted with the holes via an enhanced interface contact. Simultaneously, electrons in CdS transitioned to its conduction band, facilitating hydrogenation. The enhanced performance was attributed to the improved CdS dispersion by Ni3Si2O5(OH)4loading and efficient photogenerated carrier separation through the heterojunction formation. This work provides new perspectives for broadening the applications of mineral materials and developing heterojunction photocatalysts with good dispersibility and recyclability.
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