JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Pin Lv,Wuyou Fu,Yannan Mu,Hairui Sun,Shi Su,Yanli Chen,Huizhen Yao,Dong Ding,Tie Liu,Jun Wang,Haibin Yang
TiO 2 film materials have very wide applications in photovoltaic conversion techniques. And, TiO 2 nanotubes array film with nanowires directly formed on top (denoted as TiO 2 NTWs) was prepared by the anodization method. CdS and PbS quantum dots (QDs) were firstly cosensitized on the TiO 2 NTWs array (denoted as (CdS + PbS)/TiO 2 NTWs) by novel successive ionic layer adsorption and reaction (N-SILAR), which only needed a cation mixed solution containing Cd 2+ and Pb 2+ and an anionic solution containing S 2− . This N-SILAR method can not only effectively shorten the experimental time, simplify the experiment procedure and reduce the experiment cost, but also make the material of (CdS + PbS)/TiO 2 NTWs possess the advantages of improving electron transport and reducing chemical erosion. Moreover, the photocurrent of (CdS + PbS)/TiO 2 NTWs was 4.1 mA/cm 2 under an illumination of 100 mW/cm 2 . The most eye-popping part was that the result was 8 times higher than that of the bare TiO 2 NTWs array. The result of photoelectrochemical measurements indicated that this novel material had a potential application in photovoltaic devices.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Qiuhao Li,Xiu-Qing Qiao,Yanlin Jia,Dongfang Hou,Dong-Sheng Li
Design and construction of highly efficient and stable co-catalysts are critical for the photocatalytic H 2 generation from water. In this work, we report the novel CdS/CoMoS x core-shell nanowires (CCMS NWs) prepared by a facile in situ synthesis method. The in situ growth of amorphous CoMoS x shell on the surface of CdS NWs core efficiently promoted the photocatalytic H 2 evolution under visible light irradiation . The optimized CCMS sample containing 15 mol% CoMoS x (CCMS-15) achieves a H 2 evolution rate as high as 477.96 μmol·h − 1 under visible light irradiation, up to 26.3 times over bare CdS (18.2 μmol·h − 1 ). Moreover, the constructed core-shell CdS/CoMoS x photocatalyst shows a long-term stability without noticeable activity degradation. Based on the detailed analyses of PL , UV–vis DRS , transient photocurrent responses, EIS, Mott-Schottky plots and ESR , the significantly enhanced activity is ascribed to the synergistic effect of increased visible light absorption , suppressed photo-generated charge carries recombination and the amorphous defective structure of CoMoS x co-catalyst. In consideration of its facile synthesis, low cost, and superior performance, the amorphous CoMoS x appears to be promising co-catalyst for photocatalytic water splitting.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yan Zhao,Jian Gong,Xiaobin Zhang,Rongmei Kong,Fengli Qu
Recently, photoelectrochemical (PEC) biosensing has received considerable attention with wide applications in biotechnology and biomedicine. Here we report a novel PEC biosensing platform constructed via the combined strategy of both PEC analysis and bioetching. Urchin-like ZnO-Au@CdS microspheres were obtained by depositing Au nanoparticles (NPs) and CdS NPs on the surface of urchin-like ZnO microspheres. The introduction of intermediate electrotransfer of Au NPs to isolated ZnO and CdS systems significantly enhances the PEC property. CdS NPs can be irreversibly bioetched by an enzymatic reaction catalyzed by horseradish peroxidase (HRP) and H 2 O 2 . As a result, H 2 O 2 detection is realized based on the decrease of the intensity of the PEC signal. This mediator-free and interference-free sensing platform has a linear range from 0.15 to 100 μM with a detection limit of 0.04 μM H 2 O 2 at S/N = 3. Furthermore, glucose oxidase (GOD) was successfully immobilized on ZnO-Au@CdS microspheres to construct a glucose biosensor with a detection limit of 0.18 μM at S/N = 3. The PEC biosensor shows good sensing performance with low detection limit, mediator-free and accuracy, strong anti-interference, promising its application in PEC biosensing.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2012
·
IF 4.555
Zhengqing Liu,Shaopu Liu,Pengfei Yin,Youqiu He
A novel fluorescent probe for Cu 2+ determination based on the fluorescence quenching of glyphosate (Glyp)-functionalized quantum dots (QDs) was firstly reported. Glyp had been used to modify the surface of QDs to form Glyp-functionalized QDs following the capping of thioglycolic acid on the core–shell CdTe/CdS QDs. Under the optimal conditions, the response was linearly proportional to the concentration of Cu 2+ between 2.4 × 10 −2 μg mL −1 and 28 μg mL −1 , with a detection limit of 1.3 × 10 −3 μg mL −1 (3 δ ). The Glyp-functionalized QDs fluorescent probe offers good sensitivity and selectivity for detecting Cu 2+ . The fluorescent probe was successfully used for the determination of Cu 2+ in environmental samples. The mechanism of reaction was also discussed.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 10
·1-10
·
IF 4.3
Jia Hongwei,Yue Xiaoyang,Hou Yuying,Huang Fei,Cao Cuiyao,Jia Feifei,Liu Guanhua,Zheng Xiaobing,Liu Yunting,Jiang Yanjun
Unspecific peroxygenases exhibit high activity for the selective oxyfunctionalization of inert C(sp 3 )-H bonds using only H 2 O 2 as a clean oxidant, while also exhibiting sensitivity to H 2 O 2 concentration. CdS-based semiconductors are promising for the photosynthesis of H 2 O 2 owing to their adequately negative potential for oxygen reduction reaction via a proton-coupled electron transfer process, however, they suffer from fast H 2 O 2 decomposition on the surface of pristine CdS. Therefore, [Cp*Rh(bpy)H 2 O] 2+ , a highly selective proton-coupled electron transfer catalyst, was anchored onto a supramolecular polymer-grafted CdS nanoflower to construct an efficient integrated photocatalyst for generating H 2 O 2 , mitigating the surface issue of pristine CdS, increasing light absorption, accelerating photonic carrier separation, and enhancing oxygen reduction reaction selectivity to H 2 O 2 . This photocatalyst promoted the light driven H 2 O 2 generation rate up to 1345 µmol·L −1 ·g −1 ·h −1 , which was 2.4 times that of pristine CdS. The constructed heterojunction photocatalyst could supply H 2 O 2 in situ for nonspecific peroxygenases to catalyze the C-H oxyfunctionalization of ethylbenzene, achieving a yield of 81% and an ee value of 99% under optimum conditions. A wide range of substrates were converted to the corresponding chiral alcohols using this photo-enzyme catalytic system, achieving the corresponding chiral alcohols in good yield (51%–88%) and excellent enantioselectivity (90%–99% ee).
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高影响因子
Nano Energy
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2017
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IF 12.343
Yu Yu,Yi Huang,Yifu Yu,Yanmei Shi,Bin Zhang
The ever-increasing desire for clean and renewable energy has triggered the development of novel materials for photoelectrochemical (PEC) water splitting. However, elaborate design of photoanode materials with high light-harvesting capability, high charge-separation efficiency and long-term stability for converting solar energy into hydrogen fuel is highly challenged. Herein, we fabricated the self-supported gradient oxygen-doped three-dimensional (3D) CdS branched nanorod array (Grad-O CdS), in which a continuous built-in band bending structure was constructed by gradually oxygen doping. The kinetically-confined anion exchange under non-equilibrium condition was confirmed to be critical to achieve the gradient doping. The obtained Grad-O CdS exhibited a large photocurrent density of 6.0 ± 0.1 mA cm −2 at 0.4 V vs. RHE , which could be maintained for over 42 h. Such excellent performance and stability can be attributed to the efficient separation of charge carriers, which benefits from its continuous built-in band bending caused by oxygen doping, and enhanced light-harvesting capability derived from the narrowing band gap and 3D hierarchical structure. This gradient doping strategy provides a valuable guideline for the design of efficient photoelectrode materials for the conversion of solar energy.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2018
·Vol. 410
·期 29
·7645-7653
·
IF 3.307
Zhang Dong-Ping,Wang Ling-E,Liu Xiao-Ying,Luo Zhi-Hua,Zheng Lei,He Yun,Zhang Bo
A facile and feasible photoelectrochemical (PEC) immunoassay based on plasmon-enhanced energy transfer between gold nanoparticles (AuNPs) and CdS quantum dots (QDs)/g-C 3 N 4 nanosheets was developed for the ultrasensitive detection of lipoprotein-associated phospholipase A 2 (Lp-PLA 2 ). To construct such a sensing platform, the immunosensor was prepared by immobilizing Lp-PLA 2 on a CdS QDs/g-C 3 N 4 -modified electrode. A competitive-type immunoreaction was utilized for Lp-PLA 2 detection, with AuNP-labeled anti-Lp-PLA 2 antibody used as the competitor. Introducing AuNPs with the specific antibody for the antigen target Lp-PLA 2 led to heavy quenching of the photocurrent of CdS QDs/g-C 3 N 4 due to the plasmon-enhanced energy transfer between AuNPs and CdS QDs. The quenching efficiency decreased with increasing target Lp-PLA 2 concentration. Under optimal conditions, the PEC immunosensor presented a good photocurrent response to the target Lp-PLA 2 in the dynamic linear range of 0.01–300 ng mL −1 , with a low detection limit of 5.3 pg mL −1 . Other biomarkers and natural enzymes did not interfere with response of this system. The reproducibility and accuracy of this method for the analysis of human serum specimens were evaluated, and the results given by the method developed here were found to closely correspond to the results obtained with commercial Lp-PLA 2 ELISA kits. Importantly, this protocol offers promise for the development of exciton–plasmon interaction-based PEC detection systems.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 2
·505-512
·
IF 3.069
Xiaoli Mao,Jianguo Yu,Jun Xu,Juntian Zhou,Cheng Luo,Lang Wang,Haihong Niu,Jinzhang Xu,Ru Zhou
All solid-state quantum dot-sensitized solar cells (QDSCs) have become increasingly attractive owing to their ability to solve the issues of package difficulty and poor long-term stability. However, the commonly used colloidal lead sulfide (PbS) quantum dots (QDs) suffer from having a complicated synthesis with the use of high-temperature, harmful organic solvents and a protective atmosphere. In this work, the synchronous deposition of PbS and CdS QDs, realized through a facile successive ionic layer adsorption and reaction (SILAR), was proposed to construct efficient and stable solid-state QDSCs. This design concept affords two benefits: (1) the synchronous deposition of two sulfides suppresses the excessive growth of PbS QDs in the mesopores of films, thereby ensuring the efficient electron injection from PbS to TiO2; (2) the intimate interpenetration of two sulfides allows superior passivation of high-density defects on the surface of PbS QDs, which reduces the severe interfacial charge recombination. As a result, the solid-state (Pb,Cd)S QD-sensitized TiO2 solar cell achieved more than 5 times efficiency enhancement in contrast to the conventional PbS/CdS pattern based device. This work highlights the design of novel QD schemes for high performance solid-state solar cells.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Wei Yuan,Zhen Zhang,Xiaoling Cui,Huarong Liu,Chen Tai,Yuanrui Song
Hollow mesoporous CdS@TiO2@Au microspheres as a photocatalyst have been successfully synthesized by γ-irradiation deposition of Au nanoparticles (NPs) on the double shell of hollow CdS@TiO2 microspheres, which are prepared via the “hard core template” approach combining with calcination and solvothermal reaction. The morphology, structure, and properties of the as-prepared hybrid photocatalyst have been characterized by TEM, XRD, XPS, N2 adsorption–desorption, UV–vis DRS, PL, and photoelectrochemical measurements. The results show that the hollow mesoporous double-shell structure is formed with a fluffy TiO2 coating on the surface of the CdS shell composed of stacked CdS NPs. This ternary hybrid photocatalyst exhibits excellent photocatalytic activity for hydrogen evolution and stability under visible-light illumination, which is attributed to the unique ternary hollow mesoporous double-shell heterostructure that may extend the light responsive region, enhance the light-harvesting efficiency, prevent the direct contact between the CdS shell and O2 and H2O, facilitate mass transfer, reduce the recombination rate of charge carriers, and promote the efficiency of water splitting H2 evolution ultimately. The photocatalytic hydrogen generation rate (1720 μmol·g–1·h–1) of the hollow CdS@TiO2@Au microspheres is 2.37 and 12.7 times higher than those of hollow CdS@TiO2 and CdS microspheres, respectively. The loading amount of Au NPs also influences the photocatalytic hydrogen evolution activity of the ternary photocatalyst. Our work expands the application of hybrid hollow microsphere photocatalysts in photocatalytic hydrogen generation by the rational design for enhancing photocatalytic activity under visible light.
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高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Lingfei Liu,Minjie Qian,Zhen-quan Yang,Lixia Xiao,Xiaojuan Gong,Qin Hu
In this work, a facial ratiometric fluorescence nanorpobe (RFP) based on gadolinium and nitrogen co-doped CDs ( Gd , N -CDs) was for the first time proposed for visual detection of folic acid (FA). The Gd , N -CDs were prepared by hydrothermal heating of Gd(NO 3 ) 3 ⋅6H 2 O, o-phenylenediamine (OPD), 4-aminobenzoic acid (PABA). The as-prepared Gd , N -CDs had an average particle size of 10.27 ± 0.35 nm and exhibited two emission bands at 396 and 548 nm, respectively upon excitation at 340 nm. In the presence of FA, the 560 nm emission of Gd , N -CDs was reduced while the fluorescence signal at 457 nm was enhanced, and the quantitatively determination of FA was based on the fluorescence intensity ratio (F 457 /F 560 ). The as-constructed RFP achieved a linear range of 0.0–30.0 μM and a low detection limit (LOD) of 3.43 nM. In particular, a distinguishable change in fluorescence colour from bright orange to blue enabled the development of a smartphone-assisted visual sensing platform and a paper-based analytical device for FA detection with LODs of 3.06 μM and 0.83 μM, respectively. The proposed sensing platform was successfully utilised for onsite detection of FA in vegetable, fruit and yolk samples with satisfactory results were achieved. This work highlights the application potential of smartphone-integrated CDs-based RFP as a promising portable method for on-site analysis of FA.
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高影响因子
ACS Nano
·
2025
·
IF 16
Qianyi Cheng,Chuyue Qiao,Yu Chen,Shaopeng Fu,Jianxian Zhou,Xiangyu Chen,Zhixun Wang,Jianfeng Li,Lei Wei,Qichong Zhang
The development of high-performance blue-light-sensitive photodetectors for underwater applications faces significant challenges due to the limited absorption range and inefficient charge separation in conventional semiconductor materials. Here, we design a TiO2@CdS core–shell heterojunction that synergistically combines the advantages of both materials, significantly enhancing blue-light absorption (450–495 nm) and charge carrier separation efficiency. The resulting fiber-shaped photoelectrochemical photodetector (FPPD) displays exceptional performance with a high responsivity of 101.87 mA W–1, fast response time of <19 ms, and outstanding mechanical flexibility. Furthermore, our FPPD exhibits biomimetic synaptic functionalities including bilingual responses, short-term plasticity, and low energy consumption comparable to that of biological synapses, enabling neuromorphic information perception and computing capabilities. Practical applications in underwater optical communication, imaging, and human–machine interaction are successfully demonstrated, highlighting the FPPD’s versatility in underwater environments. This work not only advances the design of high-performance underwater optoelectronic devices but also establishes a direct connection between traditional photodetection and emerging neuromorphic computing, laying the groundwork for innovative underwater systems and wearable technologies.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Ming-Yu Dou,Shu-Rui Han,Xin-Xin Du,Dong-Hui Pang,Lei-Lei Li
The photocatalyst is a crucial factor in determining solar-to-H 2 efficiency for solar-driven water splitting. Here, the FeP/CdS well-defined heterostructure was elaborately designed and successfully constructed in-situ to achieve efficient water splitting by using a simple and green solvothermal approach. In the synthetic process, the ethylenediamine plays an important role in the construction of intimate contact interface between FeP and CdS. This good quality FeP/CdS heterostructure can efficiently promote charge separation and transportation, and therefore the charge recombination of CdS was significantly suppressed. As a result, the as-synthesized FeP/CdS heterostructure showed excellent photocatalytic performance under visible-light irradiation with an optimal hydrogen evolution rate of 37.92 mmol g −1 h −1 and an apparent quantum yield of 31.50% at 420 nm far exceeding that of pristine CdS by more than 122 folds. This rate, to the best of our knowledge, outperforms other similar catalytic systems .
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