CATALYSIS LETTERS
·
2018
·Vol. 148
·期 11
·3445-3453
·
IF 2.911
Li Xia,Dong Hao,Wang Bo,Lv Jun,Xu Guangqing,Wang Dongmei,Wu Yucheng
Firstly, h-CdS/c-CdS homojunction was prepared by solvothermal method with controlling the Cd-to-S molar ratio. Then, the MoS 2 /h-CdS/c-CdS nanocomposites were constructed by ultrasonic method with different MoS 2 amount. The experimental results showed that when the molar ratio of Cd and S was 1:1 and the amount of MoS 2 was 1.5 wt%, the MoS 2 /h-CdS/c-CdS nanocomposites exhibited excellent photocatalytic performance for hydrogen evolution under visible light. The total amount of hydrogen evolution was 3753.12 µmol for 5 h, and its average hydrogen evolution rate was 40.79 mmol h −1 g −1 with an apparent quantum efficiency of 38.16% irradiated at 420 nm, which was about 7.3 times when compared with the h-CdS/c-CdS homojunction (Cd:S = 1:8). The enhanced photocatalytic performance of MoS 2 /h-CdS/c-CdS could be attributed to the improved specific surface area and formation of well bonded interface structure, which not only enhanced the response to visible light but also decreased the recombination rates of photogenerated charge carriers. Graphical Abstract
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Liangfeng Luo,Yidi Wang,Siping Huo,Peng Lv,Jun Fang,Yang Yang,Bin Fei
CuS/CdS(H)/CdS(C) photocatalysts were synthesized via the hydrothermal method by employing thiourea , Cd(CH 3 COO) 2 ·3H 2 O and copper 1,4-benzenedicarboxylate MOF (CuBDC). The photocatalysts were characterized by XRD , XPS , BET, TEM and UV–vis diffuse reflectance spectra. Interestingly, hexagonal CdS (CdS(H)) and cubic CdS (CdS(C)) were formed with phase junctions in one step when CuBDC was introduced in the synthesis process, in addition, CuS nanoparticles were deposited on CdS. However, only hexagonal CdS was obtained without CuBDC. It demonstrated that CuBDC was not only the precursor of CuS but also the structural modifier for CdS. With the reduction of re-combination of photo-induced electrons and holes caused by phase junctions and the enhancement of visible-light absorptions due to the loading of CuS, all CuS/CdS(H)/CdS(C) photocatalysts had higher photocurrent densities under visible-light irradiation, and consequently the higher rates of H 2 production than pure CdS(H). Typically, the catalyst with 2.89 wt% of Cu showed a highest rate of H 2 evolution at 2042 μmol/g/h.
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
Applied Surface Science Advances
·
2023
·
IF 6.2
Zhufeng Shao,Yonglong Zhang,Jianyong Cheng,Libin Shi,Xiujuan Yang,Xiaoming Xiu
Firstly, oxygen vacancy defects are intentionally introduced in the preparation process of TiO 2 nanotube arrays (TiO 2 -NTAs) and porous silicon arrays (PSA) films through the anodic oxidation method after annealing treatment, as expected. Then, CdS/TiO 2 -NTAs and CdS/PSA heterostructures are successfully fabricated using the electrodeposition method, incorporating abundant surface vacancy defects. The crafted CdS/TiO 2 -NTAs nanoheterojunctions presented elevated photoelectrochemical (PEC) performances and sensing activities compared with that of CdS/PSA, validating by photodegradation and PEC biosensing tests, which mainly ascribed to the synergistic effect between the promoted carriers separation efficiency and boosted surface active sites induced by vacancies defects. Furthermore, a comparative and comprehensive interfacial charge transfer mechanism and qualitative dynamic processes for CdS/TiO 2 -NTAs and CdS/PSA type-II nanoheterojunctions are proposed, revealing an enlarged staggered band offset between CdS and TiO 2 -NTAs. The evaluation of this band offset was conducted using nanosecond time-resolved transient photoluminescence and steady photoluminescence spectra, respectively. Following this scheme, the photodegradation rate for CdS/TiO 2 -NTAs nanocomplex toward degradation of MO was 92.8% and 1.06 times than that of CdS/PSA; while the PEC biosensing performance for CdS/TiO 2 -NTAs showed a detection range 0 – 600 μM and limit of detection of 2.3 μM, with a sensitivity of 456 mA cm −2 M −1 .
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jiangfan Sun,Mingcai Yin,Yixian Li,Kaiyue Liang,Yaoting Fan,Zhongjun Li
CdS is a promising photocatalyst and combining MoS 2 with CdS can realize efficient photocatalytic hydrogen production. However, most of the previous researches about MoS 2 /CdS composites focus on hexagonal CdS. Studies on cubic CdS are still rare due to its unstability. Thus in this paper, a ternary composite CdS-MoS 2 /C (abbreviated as CdS-MC, M = MoS 2 , C = activated carbon) was synthesized by facile in-situ liquid phase precipitation of cubic CdS on MoS 2 /C. Based on a series of characterizations, its photocatalytic hydrogen production performance was studied. Under the irradiation of a LED lamp , a high H 2 evolution activity of 879.6 μmol h −1 was achieved for the composite CdS-10%MC, which is 23.3 times that of pure CdS. In addition, its performance is much higher than that of the hexagonal CdS-MC sample (265.6 μmol/h) obtained by heat-treatment of CdS-MC at 400 °C for 1 h under N 2 atmosphere. What’s more, the stability of CdS-MC was investigated and the possible reasons for its unstability were analyzed in detail. To improve the stability, a method of 4-mercaptobenzoic acid (4-MBA) modification was also managed. Finally, possible mechanism for the photocatalytic hydrogen production of CdS-MC was proposed.
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
ACS Applied Materials & Interfaces
·
2012
·
IF 4.525
Man Luo,Yong Liu,Juncheng Hu,Hang Liu,Jinlin Li
CdS and Ni-doped CdS hollow spheres were synthesized via a simple template-free one-pot method. The products were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, energy-dispersive spectroscopy analysis, X-ray photoelectron spectroscopy, and UV–vis absorption spectroscopy. The formation mechanism for the Ni-doped CdS hollow spheres was discussed. The prepared CdS and Ni-doped CdS hollow spheres showed the superior photocatalytic activity for the degradation of RhB under visible light (λ > 420 nm) irradiation, and 1.2 mol % Ni-doped CdS hollow spheres were found to be highly efficient for organic pollutants RhB and phenol removal. Moreover, this catalyst showed improved stability, and the activity did not decrease significantly after four recycles. The unique hollow spheres structure may favor the harvesting of exciting light due to multiple scattering within the interior space, and the doping of Ni2+ may facilitate the generation of electrons and holes pairs and inhibit their recombination rate by act as a temporary trapping sites of photoinduced electrons.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Lizi Chu,Yuan Lin,Yunpeng Liu,Hongjuan Wang,Qiao Zhang,Yuhang Li,Yonghai Cao,Hao Yu,Feng Peng
A facile method of loading CoS x nanosheet onto CdS nanorod has been designed, and the prepared CdS-CoS x composite catalyst exhibited significantly improved performance for photocatalytic hydrogen evolution compared with CdS catalyst. This composite catalyst was also used as a photoanode for photoelectrochemical (PEC) hydrogen production . The hydrogen production rate reached 168.6 μmol cm −2 h −1 (37.77 L m −2 h −1 ) under the simulated solar light, which is 2.7 times that of CdS and the same as that of CdS–Pt. In addition, in the Na 2 S–Na 2 SO 3 system for PEC hydrogen production, an abnormal relationship between photocurrent and the hydrogen production yield was found. By designing a series of experiments, the photocatalytic and photoelectrochemical characteristics for hydrogen production were reasonably revealed for the first time. In this work, the prepared structured catalyst is easy to be recycled, and CoS x can replace precious metal Pt, showing a promising application.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 65
·16653-16659
·
IF 5.317
Shuangshuang Kai,Baojuan Xi,Yifeng Wang,Shenglin Xiong
Graphical Monodisperse submicrospheres : A one-pot method was developed for the preparation of monodisperse submicrospheres of core–shell CdS and its core–double shell derivative CdS@Zn x Cd 1− x S. Owing to its special semiconductor heterojunction, CdS@Zn x Cd 1− x S shows remarkably improved activity for H 2 evolution in comparison to bare CdS under visible-light irradiation (see figure). Chalcogenide micro/nanocomposite structures have been attracting worldwide attention due to prospective applications in photocatalytic hydrogen production. Well-defined micro/nanostructures with pronounced properties are of extraordinary importance. Herein, a facile one-pot method for the synthesis of monodisperse, size-controllable CdS core–shell and CdS@Zn x Cd 1− x S core–double shell submicrospheres, which were engineered with respect to structure and size, is reported. CdS core–shell submicrospheres with different sizes were selectively prepared for the first time. The growth mechanism was investigated in detail by monitoring the time-dependent morphology of intermediates by TEM. By introduction of a zinc precursor in the synthetic system, CdS@Zn x Cd 1− x S core–double shell submicrospheres were obtained by cation exchange of CdS with zinc ions, with a process of diffusion of CdS towards the outside and transformation of Zn x Cd 1− x S crystallites. The H 2 evolution rate over CdS@Cd x Zn 1− x S (5.17 mmol h −1 g −1 ) is 12.3 times that of CdS core–shell structures (0.42 mmol h −1 g −1 ) under visible light, owing to the efficient charge separation, as demonstrated by electrochemical impedance and transient-state time-resolved photoluminescence spectroscopy. Furthermore, CdS@Zn x Cd 1− x S core–double shell structures exhibited excellent stability over 20 h of hydrogen production.
研究领域:
材料科学
·
纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 22
·期 8
·2569-2577
·
IF 2.509
Li Liu-Ping,Liu Min,Zhang Wei-De
In this study, CdS/BiVO 4 heterojunction was successfully synthesized on the FTO-coated glass substrate through electrodeposition annealing followed by the second electrodeposition. First, the BiVO 4 films were prepared by electrodepositing nanoporous BiOI, and then, it was converted to BiVO 4 via annealing. Then, CdS was electrodeposited onto the BiVO 4 /FTO electrode. The obtained CdS/BiVO 4 heterojunction shows higher photoelectrochemical (PEC) performance and higher stability for PEC water splitting than the blank BiVO 4 films. The maximum photocurrent density of 6.6 mA cm −2 at 0.4 V vs Ag/AgCl was obtained for CdS/BiVO 4 /FTO, which is 4.2 times of that of the blank BiVO 4 /FTO (1.6 mA cm −2 ). The enhancement mechanism of the CdS/BiVO 4 /FTO heterojunction was investigated. The CdS achieves the efficient visible light absorption and forms heterostructure with BiVO 4 , which promotes the separation efficiency of photogenerated electron-hole pairs in BiVO 4 to enhance PEC performance of CdS/BiVO 4 heterojunction.
研究领域:
材料科学
·
能源科学
·
光催化
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guanglu Xia,Jianhao Qiu,Shengwang Gong,Dingliang Dai,Biyao Fang,Yixin Li,Jianfeng Yao
Specific intermolecular interactions are the keys to constructing benign interfacial compatibility, which determines the activities of hybrid photocatalysts. In this study, CdS/TpPa-Cl 2 /MXene hybrids were compactly developed through the mediation of chlorine groups in TpPa-Cl 2 with MXenes and CdS. Owing to the formation of the Schottky junction between TpPa-Cl 2 and MXene and the heterojunction between TpPa-Cl 2 and CdS, as well as the close interfacial contacts among them, the photogenerated electron–hole pairs are effectively separated, which ultimately results in efficient photocatalytic activities. For visible-light-driven H 2 O 2 production in ambient air and pure water, CdS/TpPa-Cl 2 /MXene hybrids could achieve a high H 2 O 2 yield of 1005 μmol·L –1 , which is 2.5, 9.7 and 6.5 times greater than those of pure TpPa-Cl 2 , MXene and CdS, respectively. The mechanism investigation revealed that an indirect O 2 reduction pathway with ·O 2 – as an intermediate occurred for H 2 O 2 production over the CdS/TpPa-Cl 2 /MXene composites, and this two-electron O 2 reduction process was manifested as the primary way. This study provides insight into the construction of multi-component composite photocatalysts with high efficiency on the basis of covalent organic frameworks.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 7
·1-13
·
IF 2.02
Qin Dezhi,Wang Li,Wang Yabo,Du Xian,Zhang Li,Zhang Qiuxia,He Bingyu
Protein-conjugated CdS nanocrystals (NCs) with different morphology have been synthesized under biomimetic condition using trypsin as capping agent in aqueous medium. The reaction parameters including concentration of trypsin, pH value, reaction time, and temperature have a major influence on the morphology and optical property of CdS NCs. XRD, selected area electron diffraction (SAED), TEM, HRTEM, and EDS characterizations were used to investigate the structure, composition, morphology, and size of as-prepared products. The binding reaction between Cd 2+ /CdS and trypsin was investigated systematically through various spectroscopic methods. UV-vis, FT-IR, photoluminescence (PL) spectra, and conductivity analysis of Cd 2+ -trypsin suggest that Cd 2+ ions could coordinate with the functional groups of trypsin and induce the formation of unfolding and loosening structure in protein molecules, and the change of protein conformation was also verified by circular dichroism (CD) spectra. This interaction increased local supersaturation of Cd 2+ ions around the groups of trypsin and reduced the nucleation activation energy of CdS nuclei, which favored heterogeneous nucleation in trypsin matrix and resulted in the formation of inorganic-organic hybrid materials. The functional integrity of the enzyme conjugated to CdS NCs was studied by monitoring the enzymatic activity of CdS-trypsin conjugates. The fluorescence of CdS NCs is dependent strongly on trypsin which passivates the surface of NCs.
研究领域:
生物化学
·
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jinhua Xiong,Xinyu Bi,Song He,Changsheng Cao
Herein, CdS nanorods (CdS-NR) was synthesized through a simple and facile solvothermal method. XRD pattern and TEM/HRTEM images indicated that hexagonal CdS nanorods with a diameter of 10 nm were successfully prepared. When used as electrocatalyst for CO 2 reduction reaction (CO 2 RR), CdS-NR afforded an excellent electrocatalytic performance in aqueous electrolyte. In comparison with commercial CdS nanoparticles (CdS-NP), CdS-NR could trigger the electroreduction of CO 2 to CO with a higher faradic efficiency and current densities. The enhanced electrochemical performance of CdS-NR than that of CdS-NP were ascribed to its enhanced adsorption of CO 2 , charge transfer ability and more exposed active sites. More importantly, it was noticed that H 2 generated along with CO, and the generated gas products with controllable ratios exhibited impressive potentials to directly using as syngas.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Haitao Zhao,Heyuan Liu,Hongjie Zhu,Jianmin Dou
Building intimate interface of heterojunction is crucial to boosting photocatalytic activity via accelerating charge carrier separation. In this paper, for the first time, 0D/3D SnIn 4 S 8 /diethylenetriamine-CdS (SIS/D-CdS) type-II nano-heterojunction is constructed by in-situ hydrothermal method, which focuses on improving the solar H 2 evolution. Strikingly, SEM, HR-TEM images strongly demonstrate 0D SIS loading on 3D dandelion-like D-CdS surfaces. Among all the nano-heterojunctions, the final optimized 7-SIS/D-CdS displays 4.6 times and 2.8 times higher than that of pristine D-CdS and p-7 % SIS/D-CdS in photocatalytic hydrogen evolution rate, respectively. Furthermore, the AQE reaches 21.57 % under 420 nm monochromatic wavelength light irradiation. Meanwhile, composite material exhibits excellent stability during multiple cycles process. In particular, the TC degradation efficiency of 7-SIS/D-CdS reaches 89.4 % within 40 min. This improved photocatalytic activity and photostability are ascribed to fact that the formation of high-quality interface with intimate contact over the SIS/D-CdS nano-heterojunction and SIS as hole capture agent. XPS analysis, work functions, and charge density distributions results further elucidate the charge transfer path between D-CdS and SIS over SIS/D-CdS nanocomposite. Therefore, a possible photocatalytic charge carrier migration mechanism is proposed. This work not only enriches the application of SnIn 4 S 8 -modified composites in photocatalytic H 2 system, but also provides a very promising strategy for designing high-efficient 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
危险品化学品经营许可证（带存储）