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
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环境科学
✓ 已验证
产品关联
DOI
PubMed
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
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环境科学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2016
·Vol. 27
·期 35
·355402
·
IF 3.573
Chunyan Zhang,Yongfeng Lu,Qingqing Jiang,Juncheng Hu
CdS hollow spheres (CdS HS) coupled with graphitic carbon nitride (g-C3N4) photocatalysts are synthesized and characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflection spectroscopy (DRS), x-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and photoluminescence spectroscopy (PL). The effect of CdS content on CdS HS/g-C3N4 activity is investigated by the degradation of Rhodamine B (RhB). The sample of 20 wt% CdS content shows the best photocatalytic performance under visible-light irradiation, with the corresponding RhB degradation rate reaching 97.3%. The excellent photoactivity of CdS HS/g-C3N4 is attributed to the synergistic effect of g-C3N4 and CdS HS. A possible photocatalytic mechanism of the CdS HS/g-C3N4 composite is proposed and corroborated by PL.
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
FUEL
·
2022
·
IF 8.035
Tingzhen Chen,Chengwu Yang,Saravanan Rajendran,Yongpeng Lei,Xinyu Zhang,Jiaqian Qin
The photocatalytic water splitting to produce hydrogen is of great significance to solve the energy crisis, so the development and research of the visible-light-driven energy conversion have the priority in the progress of photocatalytic technology. Herein, we synthesized CdS with hollow sphere (CdS-HS) structure and combined it with CoN to form CoN/CdS-HS photocatalytic system. The particular hollow sphere structure and cocatalyst CoN in the CoN/CdS-HS system increase the utilization of visible light and promote the separation and transfer of photo-generated carriers for photocatalysts, which greatly improves photocatalytic performance of materials. The time‐resolved photoluminescence spectra shows that the carrier lifetime of 15%CoN/CdS-HS is 7.52 ns, which is much larger than that of CdS (4.26 ns). In addition, the hydrogen output of the optimized 15%CoN/CdS-HS is 4.57 times superior to that of pristine CdS-HS under the same conditions. The photocatalytic hydrogen evolution rate of 15%CoN/CdS-HS reaches 58.80 mmol/g . h under visible light with an apparent quantum efficiency (AQE) of 23.53% at 405 nm monochromatic light. After 25 h of photocatalytic reaction, the 15%CoN/CdS-HS can still maintain excellent overall stability. This work provides an idea for the design and development of efficient visible-light-driven photocatalysts in the future.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2013
·
IF 1.304
Qian Mi,Daiquan Chen,Juncheng Hu,Zhengxi Huang,Jinlin Li
A novel N-doped graphene/CdS hollow sphere nanocomposite photocatalyst was synthesized by a simple, template-free one-pot method. The samples were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, N 2 adsorption-desorption, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy. Photocatalytic degradations of methylene blue and salicylic acid were carried out to evaluate the photocatalytic activity of the nanocomposites under visible light irradiation. The N-graphene/CdS nanocomposites exhibited excellent stability and high photocatalytic activity, exceeding those of graphene oxide/CdS hollow sphere nanocomposites and pure CdS hollow spheres. This excellent photocatalytic activity of the nanocomposite was due to N-graphene acting as an excellent electron acceptor and transporter, thus reducing charge carrier recombination. It was also found that • OH acted as the main reactive species in the degradation of methylene blue under visible-light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
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