ACS Applied Energy Materials
·
2022
·
IF 6.959
Lan Ding,Senwei Zeng,Weiye Zhang,Chao Guo,Xinyi Chen,Bo Peng,Zhongpeng Lv,Hongjun Zhou,Quan Xu
Solar-driven photocatalytic hydrogen production is considered an effective strategy to mitigate the current energy and environmental challenges. Herein, a function heterostructure photocatalyst of 1D CdS nanorod rationally supported nitrogen-doped Ti3C2 MXene quantum dots (N-MQDs) is successfully constructed via the self-assembly strategy. Impressively, N-MQDs/CdS exhibits superior photocatalytic hydrogen production performance with an efficiency rate of 17094 μmol g–1 h–1, which is 14.79 times higher than pure CdS. The strong oxidizing performance of N-MQDs/CdS also presents an efficient activity for the photodegradation of phenol. The significant enhancement in performance is mainly due to the synergistic effect of the tight interfacial contact and matched energy levels between the highly conductive Ti3C2 MXene quantum dots and 1D CdS nanorod, which greatly accelerates the separation and transfer of photogenerated carriers. Regulating the energy band structure of photocatalysts via multifunctional MXene materials could hopefully motivate further interest in the reasonable design of MXene-semiconductor photocatalytic materials in energy and environmental applications.
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Kexiang Li,Hong Li,Qian Zhang,Dezhi Yang,Yaling Yang
In this work, a facile synthesis method for dopamine carbon dots-based Au nanoparticles (DA-CDs/AuNPs) by seed gold method was reported as the surface enhanced Raman scattering (SERS) booster. DA-CDs with rich in surface functional groups was synthesized using dopamine, citric acid and ethylenediamine as precursors by a facile hydrothermal method, and can be used as the capping agents and reducing agents for the synthesis of DA-CDs/AuNPs. Due to the electromagnetic “hot spots” effect, DA-CDs/AuNPs with core–shell structure exhibited strong SERS activity. Based on the specific interaction of DA-CDs/AuNPs and fenamidone, a detection method of fenamidone was established with a low detection limit of 0.05 μg/mL. Finally, the SERS sensor was successfully applied to the detection of fenamidone in fruit with recoveries between 90.6 % and 98.7 %. The method here proposed can be reliably applied for fenamidone detection on fruits.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Rong-Rong Su,Yu-Xiang Yu,Yong-Hao Xiao,XianFeng Yang,Wei-De Zhang
CuSbS 2 is regarded as a promising photo-absorber for solar energy conversion due to its proper bandgap, high absorptivity and earth abundance. Herein, novel low-cost ZnO/CdS/CuSbS 2 core-shell nanowire arrays were constructed as photoanode for hydrogen evolution through non-aqueous electrodeposition and cation exchange. The nanowire demonstrates even and compact multilayer structure. The optimal ZnO/CdS/CuSbS 2 photoanode achieves a photocurrent of 6.48 mA/cm 2 at 0 V versus Ag/AgCl and the remarkable IPCE value with approximately 52% at 480 nm in an electrolyte solution containing 0.35 mol/L Na 2 SO 3 and 0.25 mol/L Na 2 S. It also exhibited a good stability, maintained 87.9% of the initial current after 1 h measurement. The high performance benefits from well-crystalline and compact multilayer structure, high absorptivity of CuSbS 2 and CdS, p-n junction formed between CdS and CuSbS 2 which promotes the electron-hole separation and ZnO nanowire array as three dimensional scaffolds for electron percolation pathway. This work suggests the potential applications of low-cost p-n junction core-shell nanowire arrays as a highly efficient photoanode for hydrogen evolution in oil-field waste water with reductive sulfide.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Junhua You,Wanting Bao,Lu Wang,Aiguo Yan,Rui Guo
As an effective method to solve the environmental crisis and energy reserve problems, visible light-driven photocatalysts have attracted widespread attention. Various semiconductor materials (such as WO 3 , CdS, g-C 3 N 4 , Ag 3 PO 4 and BiVO 4 ) have been used as photocatalysts. Therefore, in this work, CdS/C 3 N 4 composite photocatalysts were prepared by simple co-precipitation method to improve the performance of CdS, and Rhodamine B (RhB) was used to evaluate the photocatalytic activity. The results show that the composite photocatalyst containing 20% CdS has the highest photocatalytic activity. In addition, the effects of different temperatures on the properties of the samples were investigated by heat treatment. It shows that the properties of 20% CdS/C 3 N 4 (CS-20) are greatly improved after heat treatment, due to the multiphase structure.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Qi Deng,Long Chen,Lei Shen,Xue Xia,Qinglin Zhang
Semiconductor single-crystal thin films (SCTFs) with nanoscale thickness play an important role in high-performance electronics and optoelectronic devices, owing to the excellent electrical, optical, thermal, and mechanical performance. Although enormous progress has been made in preparing two-dimensional (2D) material SCTFs, it is still challenging to grow SCTFs based on 3D materials with high efficiency. Herein, we report the efficient growth of centimeter-scale CdS SCTFs with the thickness of ∼95.41 nm on the mica substrates using a chemical vapor deposition method. The controlled experiments and the structure characterizations indicate that the SCTFs are formed by the seamless coalescence of the hexagonal CdS nanosheet domains initially grown in the same orientation on the substrate, with the epitaxial relationship of (100)CdS//(110)mica and (110)CdS//(200)mica. Importantly, the CdS SCTF-based photodetectors (PDs) demonstrate a photoswitching (Ion/Ioff) ratio up to 105 and a fast photoresponse speed (trise ≈ 0.5 ms, tdecay ≈ 1 ms). Furthermore, the PDs exhibit excellent stability to at least 2 months of storage in an ambient atmosphere and 1000-time bending. This work paves the way to synthesizing the 3D semiconductor SCTFs on a large scale and promotes their practical application in multifunctional photoelectric devices.
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CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Wen li Zhao,Yan hua Gao,Dongfeng Zhang
In this paper, spherical g-C 3 N 4 modified by N defect and O doping was prepared by a simple hydrothermal method , and combined with CdS to form a direct Z-type heterojunction . Combined with a series of characterizations (XRD, SEM, BET, FTIR and UV–vis DRS), the results show that the addition of CTAB brings a lot of positive charges on the surface of N-OCN. According to the principle of electrostatic attraction, positively charged N-OCN negatively charged CdS attract each other, which strengthens the close contact between CdS and N-OCN and plays an important role in stabilizing the formation of heterojunction. CdS is anchored to N-OCN through electrostatic interaction. Under the irradiation of visible light, the electrons on CB on positively charged N-OCN combine with holes on negatively charged CdS valence band, which improves the redox ability in photocatalytic reaction system. Taking methyl orange (MO) as a pollutant degradation model, the possible degradation mechanism was discussed in detail. This study provides a simple, effective and wide application method for the modification of g-C 3 N 4 .
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuanling Liu,Han Zhong,Xuanyu Wang,Jianfei Yang,Ziling Zhang,Jianhua Han,Dan Oron,Hong Lin
Regulating strain in perovskite films via utilizing the crystal structure relationship between solid-phase materials (SPMs) and perovskite is an effective method to achieve high-performance perovskite solar cells. It is crucial to investigate and manipulate the heterointerfaces between perovskites and SPMs since the mismatched crystal structure and energy band structure of SPMs will bring recombination sites to the heterointerfaces. In this work, CdS-modified PbS nanosheets (CPS) were prepared through cation exchange with (200)-preferred PbS nanosheets. The wide-band gap CdS charge-blocking layer of CPS nanosheets distributed at the grain boundaries effectively passivates the heterointerfaces in FAPbI3-CPS heterostructures (FAPI-CPS). Further, it potentially blocks carrier transportation and suppresses carrier recombination at grain boundaries and in FAPbI3-PbS nanosheet heterointerfaces. Attributed to the CdS layer, the FAPI-CPS devices achieve an enhanced power conversion efficiency. CPS nanosheets with an interplanar spacing slightly smaller than that of α-FAPbI3 could provide compressive strain to FAPbI3 at the FAPI-CPS heterointerfaces, leading to significantly improved device stability. The unencapsulated FAPI-CPS solar cells maintained 92% of their initial PCE after being stored at 20 ± 5 °C, 20 ± 5% RH for 2500 h.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Weijie Zhang,Xizhong Zhou,Jinzhao Huang,Shouwei Zhang,Xijin Xu
Improving the separation efficiency of photogenerated carriers and broadening the light absorption range of the photocatalyst are two important factors for improving the performance of the photocatalyst. In this paper, a new and efficient Z-scheme CdS/iron phthalocyanine (CdS/FePc) core-shell nanostructure composite material is prepared by a simple solid-phase reaction method. There are two key points in the preparation of composite materials: one is that hydrogen bonding energy is closely connected with FePc, another is that FePc can be uniformly assembled on CdS nanoparticles. The photocatalytic hydrogen evolution (PHE) of the CdS/FePc nanocomposite (73.01 μmol/h) is 2.6 times higher than that of pure CdS (26.67 μmol/h). In addition, after 4 photocatalytic cycles, the PHE of the CdS/FePc composite is still 92.3% of the first cycle. There are three reasons for this situation: (1) The Z-scheme heterojunction is formed to improve the separation efficiency of photogenerated carriers; (2) FePc expands the visible light absorption range of CdS; (3) The large core-shell contact area is favorable for the separation of photo-induced carriers at the interfaces. This research is conducive to the further development of new photocatalytic materials with high efficiency, low cost and simple preparation.
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高影响因子
RSC Advances
·
2026
·Vol. 16
·期 11
·10243-10254
·
IF 6.1
Wenhao Liu,Yanfeng Zhu,Zhihao Liu,Jianxia Gou
Marine corrosion poses a critical threat to the safety of offshore oil and gas facilities. To address the intrinsic drawbacks of pristine TiO2, ZnS/CdS/Ti3+-TiO2 nanotube composites were rationally fabricated via a synergistic strategy combining electrochemical anodization and successive ionic layer adsorption and reaction (SILAR) techniques. Structural and optical characterization confirmed that the as-synthesized composites feature a well-constructed cascade band alignment, which efficiently mitigates the recombination of photogenerated electron–hole pairs. Accordingly, the optimized photoanode delivered a high photocurrent density of 279 µA cm−2. When coupled with 316 stainless steel (316 SS), the composite exhibited a pronounced photo-induced potential of −0.89 V (vs. SCE), achieving a remarkable performance enhancement over pristine TiO2. This enhanced photocathodic protection originates from the synergistic interplay between Ti3+ self-doping and the ZnS/CdS heterojunction: Ti3+ self-doping introduces abundant electron donors to enhance the electrical conductivity of the composite, whereas the ZnS/CdS heterojunction broadens the visible-light absorption range and accelerates the separation and directional migration of photogenerated charge carriers.
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产品关联
DOI
PubMed
高影响因子
Chemistry-An Asian Journal
·
2013
·Vol. 8
·期 10
·2395-2400
·
IF 4.572
Guancai Xie,Kai Zhang,Hui Fang,Beidou Guo,Ruzhi Wang,Hui Yan,Liang Fang,Jian Ru Gong
CdS modified with reduced graphene oxide (RGO) has been widely demonstrated to be effective in the field of solar-energy conversion. However, the inherent mechanism of this superior property is still not thoroughly understood. Thus the photoelectrochemical method was employed to systemically investigate the synergetic effect between CdS and RGO. The result shows that the photoelectrochemical properties of RGO/CdS samples are sensitive to the relative ratio of RGO to CdS, and the photoelectrode with 1.0 wt % ratio of RGO possesses the best photoelectrochemical performance. Further investigation demonstrates that the synergetic effect between CdS and RGO directly influences the charge-transport property and band-structure of the composite, which is also supported by the X-ray photoelectron spectroscopy data and first-principle simulation, respectively.
研究领域:
材料科学
·
光电化学
·
可再生能源
·
纳米材料
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高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 8
·2107-2113
·
IF 5.256
Xiwei Zhang,Jie Mao,Zhibin Shao,Senlin Diao,Dan Hu,Zhenjie Tang,Haihua Wu,Jiansheng Jie
For solar cells, high open circuit voltage is necessary for their high output voltage. Usually, two methods are used to increase the open circuit voltage: using suitable and matched large band-gap materials and reduction of saturation current. Herein, large band-gap p-type ZnSe nanowires and n-type CdS films are used to construct core–shell p–n heterojunctions with high open circuit voltage. Furthermore, a 4 nm Si3N4 layer is inserted between the ZnSe core and the CdS shell in order to passivate the interface defects and to reduce recombination and the saturation current. Additionally, a fast annealing process is employed to reduce the series resistance for improved performance. For a typical device, an optimum high open circuit voltage of ∼1.3 V and an energy conversion efficiency of ∼5.27% were achieved for its photovoltaic operation. Moreover, tens of devices were fabricated to demonstrate their stable and consistent performance.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
半导体器件
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高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2020
·Vol. 41
·期 24
·2000120
·
IF 4.886
Chun-Xia Zhang,Hong-Wei Li,Yuqing Wu
A novel strategy is reported for the synthesis of glutathione (GSH)-protected bimetallic nanoclusters, Au-AgNCs@GSH, and its fabrication with polyvinyl alcohol (PVA) into a film sensor for H 2 S gas detection. Meanwhile, carbon dots (CDs) synthesized from polyethyleneimine (PEI) are introduced as an internal standard to correct the photobleaching of Au-AgNCs@GSH and uniformity of film. The joining of it greatly improves the chemical and structural stability of the composite film via multi cross-linking between PEI, PVA, and GSH. The PVA-AuAgNCs-CDs film exhibits an emission-quenching response to H 2 S gas at atmosphere, which is highly repeatable, fast, sensitive, and can distinguish H 2 S from other poisonous gases. Finally, the in-depth mechanism investigations reveal that the quenching response is attributed to decomposition of Au-AgNCs@GSH and the formation of Au 2 S and Ag 2 S in the composite film. As a sensor, the PVA-supported film combines the functions of fluorescent metal nanoclusters and polymer CDs, providing a portable device for the rapid detection of H 2 S gas in air.
研究领域:
材料科学
·
分析化学
·
纳米技术
·
环境监测
·
传感器技术
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高影响因子
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