JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 22
·20315-20324
·
IF 2.22
Tan Yang,Zhang Zheng,Guo Fuqiang,Guo Renqing,Bai Haineng,Zhang Baohua,Li Xin,Yang Qian,Liu Xuebo
In this study, multi-shaped CdS was synthesized by hydro- and solvothermal methods. Interestingly, the results of scanning electron microscopy and transmission electron microscopy showed that branch-like CdS could be transformed into ball-like and flake-like in deionized water by ethylenediaminetetraacetic acid and l -cysteine, respectively, and the growth mechanism of CdS was discussed and explored: the ion-binding rate might be the main factor for the morphology transformation of CdS. X-ray diffraction and energy dispersive spectroscopy revealed branch-like CdS which exhibited the hexagonal phase. Besides, the optical characteristics of CdS were performed by ultraviolet–visible and photoluminescence spectrum. Also, CdS was utilized to explore the photocatalytic activity of rhodamine B, and the result showed that the photocatalytic activity of ball-like CdS was higher than flake-like and branch-like CdS.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 12
·7871-7878
·
IF 1.093
Zhang Qiang,Yang Ping,Shen Jianxing,Yu Jinghua
Graphene/CdS composites were synthesized through the direct deposition of CdS nanoparticles on graphene sheets. The high conductivity of graphene sheets and the intimate heterointerfacial connection between graphene sheets and CdS nanoparticles provided prominent advantages for enhancing
light absorption and facilitating the transfer of photogenerated carriers from CdS nanoparticles, thus leading to an effectively separation of electron–hole pairs and consequently an improvement in photocurrent intensity. A highly sensitive and selective photoelectrochemical sensor for
detecting copper ions (Cu2+) was developed based on the interaction between Cu2+ and CdS by forming Cu
x
S-coated CdS nanoparticles, which serves as the recombination centers, impedes the transfer of electron from the conduction band of CdS to graphene
sheets, and consequently leads to a decrease in photocurrent intensity. The sheets not only effectively transferred the photogenerated electrons deriving from CdS nanoparticles but also resulted in an enhancement in photocurrent intensity in the presence of various metal ions except Cu2+.
The sheets amplified the photoelectric response of CdS semiconductor for Cu2+ sensing, in which the photocurrent intensity decreased dramatically.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Ligang Ma,Chao Lin,Wenjun Jiang,Le Xu,Yujie Shao,Tianyu Zhu,Ting Zhao,Xiaoqian Ai,Xiaoshan Wu
In the face of energy scarcity and environmental degradation, photocatalysis emerges as a green and highly efficient method to convert solar energy into a renewable energy source . In this study, CdS nanoparticles were successfully grown in situ along the edges of ZnIn 2 S 4 nanosheets using ultrasound during the synthesis process and the second phase precipitation of In(OH) 3 appeared in the process of preparation. Optimal Cd and S ratios resulted in ZnIn 2 S 4 @In(OH) 3 @CdS heterojunction exhibiting remarkable photocatalytic H 2 production performance compared to standalone ZnIn 2 S 4 and CdS. The internal heterojunction interface within the composite naturally generates an electric field, enhancing carrier separation and facilitating their transport. Additionally, the inclusion of In(OH) 3 further expedites carrier extraction. Ultimately, the mechanism behind the photocatalytic H 2 production was elucidated using the Z-scheme mechanism. This work introduced a novel approach to fabricating multifunctional photocatalysts , presenting a fresh perspective in their design and preparation.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2022
·
IF 1.438
Kaiyue Liang,Mingcai Yin,Yixian Li,Yaoting Fan,Zhongjun Li
CdS and MoS 2 are both promising photocatalytic materials for hydrogen production and lots of MoS 2 /CdS composites have been investigated. However, most of the previous work focused on relatively stable hexagonal CdS; researches on cubic CdS are still rare mainly due to its unstability. Then in this paper, a ternary composite MoS 2 /CN/CdS composed of cubic CdS, MoS 2 and graphitic carbon nitride (g-C 3 N 4 , abbreviated as CN) was prepared by simple in situ precipitation of cubic CdS on MoS 2 /CN at room temperature. Based on a series of characterizations, the photocatalytic hydrogen production performance of MoS 2 /CN/CdS was studied. The results showed that when the amount of MoS 2 /CN was 10 wt.%, the activity reached 1253.2 μ mol h − 1 , about 110 times that of pure CdS. Especially, its stability was investigated in detail by cyclic hydrogen production tests, which indicated that although the activity decreased after the first cycle, it was stable in the following three cycles mainly due to the existence of CN. Namely, a relatively stable and high performance cubic CdS-based ternary composite was achieved. This research can provide some new insights into the design of cubic CdS-based photocatalysts.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jingran Huang,Mingyuan Wang,Xiangzhao Zhang,Junnan Tao,Lei Lu,Guanjun Qiao,Guiwu Liu
To produce high energy density , clean hydrogen fuel by photocatalytic water splitting has become one of the important strategies for solving the shortage of fossil fuels in the future, so it is of great significance to improve photocatalytic performance. MXene with high conductivity and layered nanostructure is an excellent charge transport layer material, which can effectively enhance the photocatalytic performance of composites. Here, a novel 2D CdS/2D Nb 2 CT X composite was successfully prepared by a combination of electrostatic self-assembly and solvothermal reaction. The addition of Nb 2 CT X greatly hinders the agglomeration of CdS nanosheets , and the optimized CdS/Nb 2 CT X -40 composite presents a high photocatalytic H 2 evolution rate of 5040 μmol/g/h, which is 4.3 times higher than that of pristine CdS nanosheets. In particular, the formation of Schottky heterojunction leads to a significant redistribution of charges on the CdS/Nb 2 CT X composite, which can accelerate the photo-generated charge separation and transfer of CdS nanosheets, allowing more photo-generated electrons to drive the water splitting reaction. Moreover, the photoelectrochemical measurements, electron spin resonance (ESR) detection and the first-principles calculations confirm the effective charge transfer and more active free radicals of the CdS/Nb 2 CTx composite.
研究领域:
材料科学
·
能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2015
·Vol. 18
·期 7
·1090-1095
·
IF 4.034
Xueyu Zhang,Xin Ge,Shihan Sun,Yuanduo Qu,Wenzhong Chi,Chuandong Chen,Wei Lü
As a newly developed material system, graphene-based three-dimensional (3D) architectures have been receiving considerable attention due to their multifunctional properties. Herein, we explore the synergistic effect of combined CdS and graphene hybrids in 3D architectures and investigate their application in electrochemical energy storage. A facile hydrothermal procedure is used to prepare 3D reduced graphene oxide/CdS (RGO/CdS) hydrogels, and three different morphologies of CdS (ball-like, rod-like, needle-like) in the hydrogels are obtained by controlling the synthesis conditions. The results showed that the morphology of CdS significantly affects the electrochemical properties of RGO/CdS. The electrode prepared with needle-like CdS nanoparticles exhibited the highest specific capacitor value of 300 F g−1 at a scan rate of 5 mV s−1, which shows outstanding cycling stability with 94% capacitance retention after 1000 cycles of charge/discharge. These findings demonstrate the possible application of 3D RGO/CdS architectures in energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Yiyang Bi,Guangqi Wang,Jiabo Wang,Qun Liu,Yu Zhang
Intrinsic charge carrier recombination, narrow visible light absorption and poor durability restrain the photoactivity for solar-to-H 2 production. Here, noble-metal-free binary co-catalyst Ni 2 P–Ni 2 P 4 O 12 was synthesized by a simple one-step thermal phosphorylation method for enhancing CdS nanowires in visible-light-driven hydrogen generation, where the CdS nanowires are uniformly dispersed on the surface of Ni 2 P–Ni 2 P 4 O 12 through in-situ solvothermal strategy. The photocatalytic hydrogen production rate of 5 wt% Ni 2 P–Ni 2 P 4 O 12 /CdS nanowires can reach 5093 μmol g −1 h −1 using Na 2 S–Na 2 SO 3 as sacrificial agent under the irradiation of visible light (λ > 420 nm), which is about 16 times for CdS nanowires (316 μmol g −1 h −1 ). In the cycling experiments, the composite catalyst shows good stability and the hydrogen production rate remains about 83% of the initial value. The interface structure construction between CdS nanowires and Ni 2 P–Ni 2 P 4 O 12 result in the excellent photocatalytic activity , broaded visible light absorption and stability. Specifically, Ni 2 P–Ni 2 P 4 O 12 can effectively promote the separation of electron hole pairs in space, in which Ni 2 P 4 O 12 can accept H + ions and Ni 2 P can reduce the over potential of H + reduction, resulting in the synergically promotion in the photocatalytic activity. The cost-effective ternary photocatalyst exhibits great potential for sustainable and high-efficiency photocatalytic water splitting, and Ni 2 P–Ni 2 P 4 O 12 may be suitable to modify a wider variety of semiconductor photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2013
·Vol. 5
·期 11
·1649-1657
·
IF 2.509
Mi Qian,Hu Juncheng,Luo Man,Huang Zhengxi,Li Jinlin
CdS hollow spheres supported on graphene oxide sheets were successfully synthesized via a simple template-free, biomolecule-assisted method. The samples were characterized by X-ray diffraction (XRD), Transmision electron microscopy (TEM), Fourier transform infrared spectrum (FT-IR),
Ultraviolet–visible diffuse reflectance spectroscopy (DRS), Brunauer–Emmett–Teller (BET) and Photoluminescence spectra (PL). The photocatalytic activities of the GO/CdS hollow spheres nanocomposites were evaluated by photodegradation of methylene blue and salicylic acid under
visible light irradiation. Compared with pure CdS hollow spheres and degussa P25, the GO/CdS hollow spheres nanocomposites show enhanced photocatalytic activity, which is ascribed to graphene oxide as an excellent electron acceptor and transporter, thus reducing the recombination of charge
carriers.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 45
·28211-28222
·
IF 3.361
Congrong Lu,Shiwen Du,Yanfei Zhao,Qi Wang,Kuankuan Ren,Chunhe Li,Weidong Dou
The low separation efficiency of photogenerated charges and severe photocorrosion seriously impeded the application of CdS in photocatalytic water splitting. Here we report new routes to improve the photocatalytic performance of CdS nanowires (NWs) by decorating with Ag2S nanoparticles, so Ag2S/CdS heterojunction is constructed. The Ag2S/CdS heterojunction exhibited optimal photocatalytic H2 evolution rate of 777.3 μmol h−1 g−1, which is 12.1 times higher than that of pure CdS. The intrinsic characteristics of Ag2S/CdS nanocomposites, such as structure, optical properties, and surface chemical state are systematically studied by experimental characterizations and theoretical calculations. The comprehensive analysis demonstrates that the heterojunction between Ag2S and CdS accelerates photoinduced electrons transfer from CdS to Ag2S, enhancing their ability for water splitting. Meanwhile, the holes on the valence band of CdS react with the sacrificial agents, thus leading to the efficient separation of photogenerated electron–hole pairs. This work offers a simple route to synthesize one-dimensional CdS-based nanocomposites for efficient energy conversion driven by visible light.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Yong Liu,Rui Wang,Yuhan Zhu,Ruizhen Li,Jingdong Zhang
A photoelectrochemical (PEC) sensing platform was designed for catechol determination using CdS quantum dots (QDs), DNA and pristine graphene (PGR) nanocomposite film-modified electrode. In such a composite film-based PEC sensor, CdS QDs served as the photoelectric conversion element which produced photocurrent signal under visible light illumination; and DNA was designed as the biological recognition element which improved the PEC response of sensor toward catechol due to the interaction between DNA and catechol. To improve the electron transfer of the composite film, PGR with high electrical conductivity was doped, which significantly amplified the photocurrent signal of sensor. Based on such a CdS-DNA-PGR composite film-modified electrode, catechol showed a linear PEC response proportional to its concentration from 1.0 × 10 −8 to 1.0 × 10 −6 mol L −1 . The detection limit (3S/N) was estimated to be 4.9 × 10 −9 mol L −1 . The developed PEC sensor was successfully applied to determine trace catechol in water samples.
研究领域:
分析化学
·
环境科学
·
生物传感技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Juan Feng,Changhua An,Linxiu Dai,Junxue Liu,Guijuan Wei,Song Bai,Jun Zhang,Yujie Xiong
To seek robust active photocatalysts for sunlight-driven water splitting, a variety of semiconductor materials have been developed to achieve high photocatalytic efficiency. In this work, the CdS nanoplates with rough surface have been synthesized through a two-step ionic-exchange route. The as-synthesized sample was modified by Pt in an in situ photo-deposition cell to fabricate hybrid Pt/CdS nanophotocatalyst. The rate of average solar hydrogen evolution over the Pt/CdS nanoplates reached 3.75 mmol h −1 g −1 , which is significantly higher than that of bare CdS and NiS/CdS counterparts. Furthermore, the Pt/CdS exhibited very high stability in continuous solar H 2 evolution at a relatively stable state even over a 16-day reaction period, implying the as-fabricated hybrid nanophotocatalyst is approaching the practical requirements. The significantly enhanced photocatalytic efficiency was ascribed to the merits of rough plate-like nanostructures and the assistance of Pt co-catalyst, which can promote the light-absorption capability and photo-carrier separation as well as provide reactive sites. The present work opens an avenue to construct efficient and stable solar-driven catalysts for new energy creation.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 7
·2097
·
IF 4.927
Pu Li,Xiaoxiao Chen,Gaojun Wu,Zhe Wang,Chaobiao Huang
An ascorbic acid (AA) sensor was constructed based on the fluorescence resonance energy transfer (FRET) between CdS quantum dots (CdS QDs) and polydopamine (PDA) to detect trace AA sensitively. FRET occurred due to the broad absorption spectrum of PDA completely overlapped with the narrow emission spectrum of CdS QDs. The fluorescence of CdS QDs was quenched and in the “off” state. When AA was present, the conversion of DA to PDA was hindered and the FRET disappeared, resulting in the fluorescence of CdS QDs in an “on” state. Importantly, the degree of fluorescence recovery of CdS QDs displayed a desirable linear correlation with the concentration of AA in the range of 5.0–100.0 μmol/L, the linear equation isy=0.0119cAA+0.3113, and the detection limit is 1.16 μmol/L (S/N = 3,n= 9). There was almost no interference with common amino acid, glucose and biological sulfhydryl small molecules to AA. Trace amount of AA in vitamin C tablets were determined and satisfactory results were obtained; the recoveries were observed to be 98.01–100.7%.Keywords:CdS quantum dots;PDA;fluorescence resonance energy transfer;ascorbic acid
研究领域:
分析化学
·
生物传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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