ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Chen Tai,Huarong Liu,Yuan Hu
Hydrogen is a very promising green energy alternative to fossil fuel owing to both environmental friendliness and high-energy nature; however, improving the hydrogen production efficiency of photocatalysts under visible light has remained a challenge. Herein, CdS/Pt/MIL-125 nanocomposite has been fabricated using γ-ray irradiation, where Pt and CdS nanoparticles with clean surfaces are well dispersed inside and on the surface of MIL-125, respectively, which greatly promotes effective space separation of photogenerated carriers and thus improves the visible-light catalytic activity. The hydrogen generation rate of CdS/Pt/MIL-125 nanocomposite is found up to 6783.5 μmol/(g·h) under visible-light illumination, which is 7.3 times that of CdS/MIL-125 without Pt as electron trap reservoirs and 4.4 times that of Pt/CdS/MIL-125 without effective spatial separation between CdS and Pt. The reason is attributed to the synergy of ternary CdS/Pt/MIL-125 with a unique ordered mesoporous structure that may widen the absorption range of the light, improve the efficiency of light harvesting, facilitate mass transfer, prevent the aggregation of CdS and Pt nanoparticles, suppress the electron–hole (e–h) pair recombination, and provide more active sites. Moreover, the loading amount of Pt or CdS nanoparticles also affects the activity of CdS/Pt/MIL-125 nanocomposite for visible-light catalytic H2 evolution. In view of the extensive use of γ-ray irradiation in industry, this research presents a rational route to the fabrication of novel hybrid photocatalysts for improved visible-light catalytic hydrogen evolution.
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高影响因子
Nanoscale
·
2015
·Vol. 7
·期 13
·5767-5775
·
IF 7.394
Ping Wang,Jie Zhang,Haili He,Xiaolong Xu,Yongdong Jin
The use of colloidal semiconductor nanocrystals (NCs), especially those with a core/shell structure, for photocatalytic hydrogen (H2) production from water is currently one of the hottest research fields. Although the ligand on the semiconductor NC surface is crucial to the optical and optoelectronic properties of the NC, the study of the ligand effect on the photocatalytic activity of H2 generation is rarely reported. Herein, we employ nearly monodispersed CdSe/CdS core/shell NCs as a model photocatalytic system, and three kinds of ligands with different numbers of functional thiol groups (i.e., poly(acrylic acid), 3-mercaptopropionic acid and 2,3-dimercaptosuccinic acid) are selected as the ligands to investigate the effect of ligand on the efficiency of H2 photogeneration. The results show that the H2 photogeneration efficiency is highly dependent on the surface ligand of the NCs, and it increases with the increase of the number of the functional thiol groups in the ligand, and correspondingly, the photoluminescence intensity and average fluorescence lifetime, which are measured by steady state and time-resolved fluorescence measurements, are decreased. The surface trap-related charge separation efficiency, which is mediated by surface coating with different ligands, is supposed to cause the distinct ligand-dependent performance in the H2 evolution.
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 40
·23038-23045
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IF 10.733
Rongrong Pan,Jia Liu,Yuemei Li,Xinyuan Li,Erhuan Zhang,Qiumei Di,Mengyao Su,Jiatao Zhang
Here we show a novel strategy for tailoring the synergistic electrical properties of metal@semiconductor hybrid nanocrystals (HNCs) based on cation exchange-enabled electronic doping. As a demonstration, the conductive nature of Au@CdS core–shell HNCs was changed from n- to p-type by introducing Cu dopants into the CdS shell. The dependence of the conductivity type on the dopant concentration in the HNCs is disclosed by combined photoelectrochemical (PEC) studies. Moreover, a tandem PEC cell consisting of an undoped Au@CdS photoanode and a Cu-doped Au@CdS photocathode respectively modified with cocatalysts is fabricated, which displayed stable H2 and O2 evolution in unassisted PEC overall water splitting.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Guobin Mao,Qin Zhang,Yeling Yang,Xinghu Ji,Zhike He
Alkaline phosphatase (ALP) is a universal and important hydrolase that has been proved to be associated with several diseases. Herein, a simple and effective method was proposed for ALP detection based on the inner filter effect of p-nitrophenol (pNP) on the fluorescence of CdTe/CdS quantum dots (QDs). For the preparation of CdTe/CdS QDs, Na 2 TeO 3 was used as the Te source, and dithiol as the S source and surface ligand. The as-prepared CdTe/CdS QDs show good fluorescence properties, such as high quantum yield (∼80%), and good chemical/photo-stability. pNP is a hydrolysate of p-nitrophenol phosphate disodium salt under the catalysis of ALP, which could effectively quench the fluorescence of QDs due to the absorption spectra of pNP overlaps well with the excitation spectra of the CdTe/CdS QDs. Therefore, the prepared CdTe/CdS QDs could be applied for ALP detection. A good linear relationship ranging from 2.2 to 220 U/L was obtained with the limit of detection as low as 0.34 U/L. In addition, this method was successfully applied for the assay of ALP in human serum with the satisfactory results.
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高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Zongyi Huang,Pengfei Sun,Huizhen Zhang,Haikun Zhang,Shuhong Zhang,Zhou Chen,Xiaodong Yi,Shunji Xie
The integration of solar-driven H2 evolution with the selective conversion of biomass-derived alcohols into value-added chemicals has gained significant attention for full use of electrons and holes. We develop a dual-functional photocatalyst for highly selective oxidation of the Cα–H bond of benzyl alcohol to C–C coupled products (hydrobenzoin and deoxybenzoin), in cooperation with H2 evolution, using point-to-face interface engineering by decorating CdS quantum dots on Zn2In2S5 nanosheets (CdS QDs/Zn2In2S5 NS). The CdS QDs/Zn2In2S5 NS exhibit a high H2 evolution rate of 13 mmol g–1 h–1 and C–C coupled products formation rate of 10.8 mmol g–1 h–1 with 96.3% selectivity. Benzyl alcohol conversion achieves 91% with an 89% yield of C–C coupled products in gram-scale. The introduction of CdS enhances the interfacial contact, facilitating the efficient spatial separation of photogenerated electron–hole pairs and providing active sites for H2 evolution. In situ characterization and DFT calculation reveal that the carbon-centered radical •CH(OH)C6H5, generated by abstracting the Cα–H bond of benzyl alcohol, is the reactive intermediate in the photocatalytic C–C coupled process.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Ziheng Li,Fengting Yao,Yan Dai,Xuehua Ruan,Xiaobin Jiang,Xuemei Wu,Wenji Zheng,Gaohong He
Metal-organic frameworks (MOFs) offer exceptional pore tunability for targeted separations. Moving beyond conventional defect engineering which often sacrifices selectivity for permeability, we propose to construct functionalized defects that synergistically integrate hierarchical low-resistance gas transfer pathways with tailored ultra-CO 2 -philic molecular domains. This strategy is achieved by in-situ embedding β-cyclodextrin (β-CD) as a multifunctional modulator during the crystallization of NH 2 -UiO-66 (NUiO). The macrocyclic cavities of β-CD induced structural defects cooperatively optimize the pore architecture of NH 2 -UiO-66, significantly enhancing gas permeability. Concurrently, exposed Zr 6 clusters and hydroxyl groups from β-CD enhance CO 2 adsorption capacity. Furthermore, defect-induced incomplete coordination promotes hydrogen bonding between the β-CD@NUiO and Pebax, improving interfacial compatibility for MMMs. The prepared β-CD 20 @NUiO MMM at 5 wt.% filler loading exhibits a CO 2 permeability of 125.5 Barrer and a CO 2 /N 2 selectivity of 112.4, exceeding the 2019 McKeown upper bound. The in-situ construction of defects via functional molecules transcends the limitations of single-parameter optimization for mass transfer pathways and active sites in porous materials, establishing a universal design principle for multifunctional coupled separation materials.
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高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 13
·3276-3282
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IF 5.256
Yang Ding,Jie Liu,Yan Zhu,Siyang Nie,Junli Shi,Weili Wang,Junhan Hou,Xibin Yu
Cadmium based chalcogenides (CdS, CdSe, CdTe) quantum dots exhibited ultrahigh photoluminescence (PL), quantum yields (QYs) and multicolor luminescence. However, the usual synthesis needs high temperature, inert gas protection, and localized injection operation, which hinder applications seriously. Here, we synthesized CdS QDs and a series of metal-ions-doped QDs using low temperature synthesis (30–80 °C). The synthesis was designed according to supersaturated recrystallization. It was operated under air atmosphere, in DMF solution, free from inert gas protection and used non-injection operation. The obtained QDs exhibit strong and stable luminescence. They have a monodisperse, uniform morphology and good crystallinity. With increasing synthesis temperature, the emission center of the CdS QDs shifts from 500 nm to 550 nm. The metal ions doped in the CdS substrate form a deep level. The emission energy decreases and the emission center shifts to longer wavelengths. The emission peaks located at 520 nm, 534 nm, 540 nm, 578 nm and 625 nm correspond to CdS QDs doped with Sn2+, Sb3+, Ni2+, Mn2+ and Cu2+, respectively. The increased synthesis temperature also results in a red shift of the emission peak. The tunable optical properties and the suitability for large scale production endow the metal-ions-doped CdS QDs with promising potential for lighting and displays, which was demonstrated by white light-emitting diodes with a high CRI value, power efficiency and good stability.
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高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Hongjun Chen,Wang Li,Peng Zhao,Zhou Nie,Shouzhuo Yao
Herein, a CdTe/CdS QDs (with a CdTe core and a CdS shell) amplified electrogenerated chemiluminescence (ECL) of nitrogen functional graphene quantum dots (NGQDs) platform is reported. The utilization of CdTe/CdS QDs could facilitate the production of NGQDs radical, and then, a high yield of NGQDs* was formed due to the interaction of NGQDs radical with O 2 − , leading to an ∼21-fold ECL enhancement. This ECL enhancing system does not require the addition of coreactant and modification of electrode which is carried out in homogeneous solution. Benefiting from the remarkable ECL enhancement effect, a feasible and sensitive ECL sensor was constructed for ascorbic acid (AA) quantification. The proposed method features a detection limit of 70 nM with a linear calibration range from 100 nM to 100 μM, and exhibits good stability, practicability, and acceptable fabrication reproducibility, showing promising application in real-sample.
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Cheng-Feng Zhang,Hong-Wei Li,Yuqing Wu
A ratiometric fluorescence sensor was established for furfural detection. • The ratiometric sensor showed high selectivity and anti-interference. • The unique response is attributed to GSH-triggered addition to Schiff base on N -CDs. • The method was successfully applied to detect furfural in Chinese baijiu . Reliable methods for furfural (FUR) determination are significance for ensuring the food safety and quality control of Chinese baijiu . In this work, nitrogen-doped carbon dots ( N -CDs) were synthesized via a hydrothermal method using p -phenylenediamine ( p -PD) as the precursor. Taking advantage of the sequential reaction between the surface amino groups of N -CDs, FUR, and glutathione (GSH), a novel ratiometric fluorescence sensor was constructed. In the presence of FUR and GSH, the sensor exhibits a new blue emission peak at 433 nm, while the intrinsic red emission of N -CDs at 605 nm remains essentially unchanged, thereby generating a self-calibrated ratiometric signal ( I 433 /I 605 ). In particularly, this ratio increases linearly with FUR concentration increase, showing good linearity over two ranges (1.0−10 μmol/L and 10−140 μmol/L), with a detection limit as low as 80.75 nmol/L. Mechanistic investigations reveal that the sensing process involves Schiff base formation between FUR and the amino groups on N -CDs, followed by thiol nucleophilic addition of GSH to the C=N bond, these two steps together account for the emergence of the blue fluorescence. The method was successfully applied to the analysis of real baijiu samples, with spike recoveries ranging from 96.6% to 109.9%, and showing good prospects for practical application in alcoholic beverage analysis.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yizhong Zhang,Wei Zhou,Junyan Wang,Lixia Jia,Lequan Liu,Xin Tan,Tao Yu,Jinhua Ye
In this study, non-noble metal Cd decorated cubic phase CdS (CdS/Cd) thin layer on a millimeter-scale chitosan-Mg(OH) 2 xerogel beads (CMB) were elaborately designed and successfully synthesized via facile hydrated electrons (e aq •− ) assistant strategy. The in-situ formation of metallic Cd was driven by e aq •− generated from UV/Na 2 SO 3 process. Owing to metallic Cd, CMB@CdS/Cd exhibited better visible-light absorption ability and more efficient separation capability for photo-induced carriers, its hydrogen production efficiency was about threefold improved compared to CMB@CdS. Both characterization methods and density functional theory calculations determined a built-in electric field from metallic Cd to CdS and Ohmic-contact between Cd and CdS, which largely promoted the carriers transfer efficiency. Moreover, the introduction of metallic Cd on the CdS could reduce the ΔG H* , thus greatly boosting the photocatalytic hydrogen production efficiency. This work provides a simple and green approach to construct metallic Cd coupled semiconductor to achieve efficient photocatalytic applications.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121659
·
IF 7.5
Xinrui Lv,Huinan Sun,Zhijia Wu,Wei Gao,Mingshu Bi,Yufeng Wu
The study employed a synergistic surface-band engineering strategy to prepare a novel g-C 3 N 4 -based photocatalyst for the efficient and safe degradation of nitrobenzene (NB), a typical recalcitrant pollutant. Fe 0.010 /LCDs-TCN exhibited a higher density of active sites, a broader visible light absorption range, and a more effective separation and transfer of charge carriers. Importantly, Fe 0.010 /LCDs-TCN displayed a bandgap of 2.59 eV, with a valence band of + 2.04 eV and a conduction band of −0.55 eV. This narrowed bandgap, along with an optimized band potential, enabled the simultaneous generation of crucial active species ·OH and ·O₂⁻ from water and O₂. This mechanism skillfully balanced visible light absorption and redox capability. Regarding degradation performance, degradation rates reached up to 93 % for NB within 4 h, and 98 % for nitrophenols within only 60 min. Moreover, this system exhibited strong stability against pH variations and coexisting ions. The 5 cyclic experiments achieved high degradation efficiency of 74.3–94.7 %. The QSAR-based ECOSAR and Toxicity Estimation Software Tool (T.E.S.T.) confirmed a significant reduction in acute and chronic toxicity and mutagenicity of NB degradation system. This work offers a novel perspective on regulating g-C 3 N 4 by balancing light absorption and redox capability, providing a promising strategy for safe, efficient, and sustainable water purification technologies.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Guanbin Wen,Bin Zhang,Yingzeng Zhang,Qing Wang,Qianqian Guo,Qisheng Wang,Zhengfang Yang,Xiao Wang,Yushu He,Donghui Yang,Luyun Xu
Photocatalytic antibacterial materials, which kill bacteria by generating reactive oxygen species (ROS) without relying on metal ion components, offer higher safety and environmental friendliness, making them a key focus of current antibacterial research. Traditional photocatalytic materials exhibit limited responsiveness to visible light, and their antibacterial efficacy diminishes when the generation of ROS is suppressed. Therefore, this study developed a g-C 3 N 4 /CdS-Cu Z-scheme heterojunction with strong visible light responsiveness, enabling the generation of alternative ROS when one type is inhibited. The material exhibited excellent antibacterial performance under visible light, with antimicrobial rates of 95.46 % and 95.91 % against E. coli and S. aureus , respectively. Microstructural and photoelectric analyses confirmed that the material possessed a tightly coupled two-dimensional heterostructure with full-spectrum absorption capacity and efficient separation of photogenerated charge carriers. Additionally, density functional theory (DFT) calculations revealed changes in electron transfer pathways and energy band structure, further supporting the proposed antibacterial mechanism. In practical application tests, g-C 3 N 4 /CdS-Cu showed good performance in water treatment. This study on the “ROS compensation” mechanism provides a theoretical basis for the development of advanced photocatalytic antibacterial materials and expands their application range.
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高影响因子
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