NANOTECHNOLOGY
·
2019
·Vol. 30
·期 46
·465201
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IF 3.399
Congcong Wang,Dingke Xue,Xinyu Shen,Hua Wu,Yu Zhang,Haining Cui,William W Yu
Perovskite white light-emitting devices (WLEDs) without intercalation layers have not been achieved due to the ion exchange. Although the intercalation layers prevent ion exchange between perovskite nanocrystals (NCs), it also creates a new problem of charge imbalance and the structure becomes more complex. In this study, blue emitting ZnCdS/ZnS NCs with high quantum yield and stability are introduced to work with the yellow emission from CsPb(Br/I)3 perovskite NCs for WLEDs. The WLEDs are constituted of ITO/ZnO/PEI/ZnCdS/ZnS NCs/CsPb(Br/I)3 NCs/TCTA/MoO3/Au. This design avoids ion exchange between different perovskites NCs, and realizes white light emission by simple fabrication. As a result, we achieved the white light coordinates of (0.34, 0.34) and a correlated color temperature of 5153 K.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jing Wang,Xingyu Niu,Rui Wang,Kun Zhang,Xinyi Shi,Hui Ying Yang,Jilei Ye,Yuping Wu
High-entropy alloys (HEA) have been shown to be potential cocatalysts for photocatalysis, but the design of ideal semiconductor/HEA composite photocatalysts is challenging due to the complexity of their composition and the interactions within multi-element systems. To address this issue, PtCuFeNiCo HEA was selected as a cocatalyst, and a ZnCdS/PtCuFeNiCo (abbreviated as ZnCdS/HEA) nanostructured photocatalyst was designed for hydrogen production from water splitting. ZnCdS/HEA was prepared using a simple liquid-phase precipitation method, a template-assisted cation exchange method, and an ultrasound-assisted recombination method. Photocatalytic experiments showed that the hydrogen production activity of ZnCdS/HEA under visible light was 5.99 mmol·g −1 ·h −1 , which is 11.7 times that of ZnCdS and significantly higher than that of ZnCdS/Pt. Experiments and density functional theory calculations indicated that ZnCdS/HEA formed a Schottky heterojunction. The performance enhancement was attributed to the synergistic effect between PtCuFeNiCo HEA and ZnCdS, which enhanced light absorption, improved the separation and transfer of photogenerated electrons and holes, as well as provided abundant catalytic active sites and increased surface reaction activity. This study highlights the potential of HEAs and provides theoretical and experimental references for the rational design of efficient semiconductor/HEA composite materials.
研究领域:
材料科学
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能源科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2024
·
IF 3.2
Xiaoqi Xie,Mingang Fan,Hongli Du,Li Feng,Chao Liu
Recently, ZnCdS has become an attractive visible-light-driven photocatalyst due to its tunable band gap and suitable band edge position. However, fast recombination of photo-generated carriers in ZnCdS still restricting its industrial application. In this paper, a novel and high-efficiency MgTi 2 O 5 /ZnCdS composite was constructed by in situ growth of ZnCdS nanoparticles on MgTi 2 O 5 . The photocatalytic activity of the Mg 2 TiO 5 /ZnCdS composite was evaluated using methyl orange (MO), tetracycline (TC), and methylene blue (MB). The results show that the as-prepared hybrid exhibited highly efficient photocatalytic activity under visible light irradiation, and the degradation efficiencies in 1 h reach about 93 %, 96.2 % and 94.5 % for MO, TC and MB, respectively, while the pure ZnCdS show only 60 % degradation efficiency under the same conditions, respectively. The improved photocatalytic activity could be attributed to the high efficient charge separation and fast charge transport in the MgTi 2 O 5 /ZnCdS composite, which are mainly due to the built-in electron field formed at the joint of the Mg 2 TiO 5 /ZnCdS heterojunction.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Min Yang,Yongbo Wang,Yingkun Ren,Enzhou Liu,Jun Fan,Xiaoyun Hu
In our study, the synthesis conditions of ternary alloyed ZnCdS quantum dots (QDs) with different Zn/Cd molar ratios were investigated. Our results indicated that the optimal reaction conditions of ZnCdS QDs with various molar ratios were different. The ternary ZnCdS QDs were synthesized by a rather simple, facile, low-cost and effective aqueous synthesis method using air-stable compounds. UV–visible (UV–Vis) absorbance and photoluminescence (PL) emission spectra of the ZnCdS QDs showed a blue shift with the decrease of Cd, indicating the formation of alloyed QDs. The optimal reaction conditions, such as refluxing time and S/(Zn+Cd) molar ratios were different for ZnCdS QDs with different Zn/Cd ratios. The cause of the difference was attributed to the different properties of metal ions. In addition, the investigation on the photostability showed that the as-prepared ternary alloyed QDs had strong light resistance. Therefore, the ternary alloyed QDs with outstanding optical properties and high photostability showed potential biological applications and the results also offered new insights for the synthesis of ZnCdS QDs.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shenyan Zhou,Lianqing Yu,Qianlong Yang,Chong Liu,Wenjing Xie,Kehui Xue,Zhe Li,Yaping Zhang,Haifeng Zhu
The production of hydrogen via the photolysis of water represents a sustainable and environmentally benign approach to energy generation, which has the potential to mitigate energy shortages and environmental degradation. Nonetheless, the efficiency of photocatalysts is significantly limited by the effectiveness of charge carrier separation. Reducing the diffusion distance of these carriers can enhance their overall performance of the photocatalyst. In this context, a composite photocatalyst comprising CuNi 2 S 4 and ZnCdS was synthesized through one-step hydrothermal process. This bulk-phase heterojunction increases the nano-contact areas while maintaining an interface distance that is smaller than the diffusion distance of the carriers. Consequently, the optimal hydrogen production rate achieved was 33.87 mmol/g h, which is an order of magnitude greater than that of pure ZnCdS at 3.35 mmol/g h. Furthermore, the quantum efficiency at 400 nm reached 16 %. The photocurrent of the ZCS-CNS-3 % sample was 57.1 μA/cm², 4.35-fold of pure ZnCdS at 13.1 μA/cm². The incorporation of CuNi 2 S 4 significantly reduces the overpotential required for hydrogen evolution, while concurrently reducing the carrier transfer resistance by an order of magnitude. This bulk-phase structure not only broadens the prospects for the advancement of green and clean energy solutions but also enhances the methodologies for synthesizing nano-contact photocatalysts.
研究领域:
材料科学
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能源研究
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环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Jing Dong,Wenjian Fang,Hui Yuan,Weiwei Xia,Xianghua Zeng,Wenfeng Shangguan
Studies on highly efficient noble-metal-free catalysts are regarded as an important task for H2 production by water-splitting. MoS2/ZnCdS/ZnS dual heterostructures were successfully prepared with respective supernatant MoS2 colloidal solutions (called M/ZC/Z) and MoS2 precipitates (M(p)/ZC/Z). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images of the M/ZC/Z sample showed that ZnS nanosheets were decorated with ZnCdS nanorods and few-layered MoS2. Then, photocatalytic hydrogen production study was performed and the results showed that the M/ZC/Z sample has a H2 evolution rate of up to 79.3 mmol g–1 h–1 under visible light irradiation with an apparent quantum efficiency of 47.9% at 420 nm with noble-metal-free catalysts, which is nearly 5 times that of the M(p)/ZC/Z sample (15.7 mmol g–1 h–1) and approximately 9 times that of the ZC/Z sample (8.98 mmol g–1 h–1). Cycle tests showed that M/ZC/Z is stable and reusable. Without sacrificial agents, the production rates for hydrogen and oxygen evolution were obtained as 3.15 and 1.55 mmol g–1 h–1, respectively. Time-resolved photoluminescence spectra revealed that the well-matched structure is effective in the separation and transfer of photogenerated electron and hole pairs, leading to the enhancement of the photocatalytic H2 production activity.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Jiayao Du,Lijun Zhang,Linqing Zhang,Xiaoli Ma,Zhiliang Jin
Zinc-cadmium sulfide (ZnCdS) has garnered significant attention as a potential photocatalyst for hydrogen production under visible light. However, enhancing the hydrogen production rate and long-term stability of ZnCdS remains a considerable challenge in the field. In this research, ZnCdS/NiCrO 4 nanocomposites were synthesized via the physical stirring method, forming a p-n heterojunction. This heterojunction induces a localized polarization electric field at the interface due to electron cloud redistribution. The resulting electric field effectively improves charge carrier separation and facilitates the rapid migration of electrons and holes, thereby markedly enhancing the photocatalytic performance of the material in various reaction systems. Notably, the hydrogen production efficiency of the ZnCdS/NiCrO 4 nanocomposite is 6.5 times higher than that of pure ZnCdS when tested in a lactic acid solution. Additionally, in a Na 2 S/Na 2 SO 3 solution, the nanocomposite achieves a hydrogen production yield of 760.89 μmol. This research underscores the critical role of the polarization electric field in enhancing charge separation and the overall catalytic performance, offering significant insights for the development and optimization of advanced photocatalytic materials.
研究领域:
材料科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 29
·12291-12300
·
IF 3.5
Liangliang Huang,Tao Peng,Rui Wang,Beibei He,Jun Jin,Huanwen Wang,Yansheng Gong
Photocatalytic ammonia production holds immense promise as an environmentally sustainable approach to nitrogen fixation. In this study, In2O3/In2S3-ZnCdS ternary heterostructures were successfully constructed through an innovative in situ anion exchange process, coupled with a low-temperature hydrothermal method for ZnCdS (ZCS) incorporation. The resulting In2O3/In2S3-ZCS photocatalyst was proved to be highly efficient in converting N2 to NH3 under mild conditions, eliminating the need for sacrificial agents or precious metal catalysts. Notably, the NH4+ yield of In2O3/In2S3-0.5ZCS reached a significant level of 71.2 μmol g−1 h−1, which was 10.47 times higher than that of In2O3 (6.8 μmol g−1 h−1) and 3.22 times higher than that of In2O3/In2S3 (22.1 μmol g−1 h−1). This outstanding performance can be attributed to the ternary heterojunction configuration, which significantly extends the lifetime of photogenerated carriers and enhances the spatial separation of electrons and holes. The synergistic interplay between CdZnS, In2S3, and In2O3 in the heterojunction facilitates electron transport, thereby boosting the rate of the photocatalytic nitrogen fixation reaction. Our study not only validates the efficacy of ternary heterojunctions in photocatalytic nitrogen fixation but also offers valuable insights for the design and construction of such catalysts for future applications.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Wang Xin,Liu Boyan,Ma Siqing,Zhang Yingjuan,Wang Lianzhou,Zhu Gangqiang,Huang Wei,Wang Songcan
Amorphous semiconductors without perfect crystalline lattice structures are usually considered to be unfavorable for photocatalysis due to the presence of enriched trap states and defects. Here we demonstrate that breaking long-range atomic order in an amorphous ZnCdS photocatalyst can induce dipole moments and generate strong electric fields within the particles which facilitates charge separation and transfer. Loading 1 wt.% of low-cost Co-MoS x cocatalysts to the ZnCdS material increases the H 2 evolution rate to 70.13 mmol g −1 h −1 , which is over 5 times higher than its crystalline counterpart and is stable over the long-term up to 160 h. A flexible 20 cm × 20 cm Co-MoS x /ZnCdS film is prepared by a facile blade-coating technique and can generate numerous observable H 2 bubbles under natural sunlight, exhibiting potential for scale-up solar H 2 production.
研究领域:
材料科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
Science China-Materials
·
2025
·
IF 7.4
Wang Ling,Lou Qing,Qian Haixia,Yin Xiaoshuang,Liu Ying,Yang Wenzhong,Xu Hui
The advancement of a Z-scheme photoelectrochemical (PEC) system for hydrogen production and water splitting holds significant promise in addressing the escalating global energy crisis. In this study, a ternary Co-ZnCdS-BiFeO 3 Z-scheme composite photocatalyst was used. By optimizing the ratio of BiFeO 3 /ZnCdS, the photocatalytic activity of the material is enhanced, while enhancing the electron transfer efficiency and strengthening the stability of the photoelectric cathode. The Co(dmgBF 2 )2(H 2 O) 2 was selected as the co-catalyst to further improve the electron-hole separation efficiency and photocorrosion resistance. Under visible light irradiation, the hydrogen production rate of the PEC system can reach 4.03 mmol g −1 h −1 . Under optimal conditions, applying a bias voltage of −0.1 V vs. RHE can produce −38.5 µA cm −2 . The photocatalytic current density of is as high as 13 times that of pure ZnCdS, greatly improving the hydrogen production efficiency and stability of the photocatalyst. The study offers a novel benchmark for the development of a high efficiency Z-scheme photocatalyst designed for water splitting and provides new insights into intrinsic resistance through PEC analyses.
研究领域:
材料科学
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能源化学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lei Zuo,Ning Yang,Weiwei Xia,Xianghua Zeng,Rongxing Cao
Due to exceptional photocatalytic hydrogen evolution properties, ZnCdS is considered as a promising strategy to enhance the photocatalytic hydrogen evolution performance of ZnCdS with introducing sulfur vacancy or constructing heterostructures. Here, sulfur vacancy-rich ZnCdS nanoparticles were synthesized via a straightforward co-precipitation method followed by a high-temperature annealing treatment. Then NiS@ZnCdS composites were prepared with the hydrothermal method after mixed the precursors of Ni(Ac) 2 ·2H 2 O and CH 4 N 2 S with the prepared Zn 0.5 Cd 0.5 S powders. Thereafter, the prepared samples were used as photocatalysts for hydrogen production. The results showed that the optimized NiS@ZnCdS heterostructures has a photocatalytic hydrogen production rate of 42 mmol · g −1 ·h −1 , which is 14 times higher than that of the ZnCdS sample without annealing treatment. The mechanism behind has been analyzed. A staggered band energy alignment between NiS and ZnCdS was constructed from the measurements of ultraviolet photoelectron spectroscopy (UPS) and XPS spectra, and a z-scheme charge transfer mode was proposed between NiS and ZnCdS with an assistance of electron spin resonance (ESR) signals of •O 2 − . The z-scheme heterostructure between NiS and ZnCdS can enhance the separation of photogenerated electron-hole pairs and increase the photocatalytic activity. The studies will be helpful to construct the NiS related heterostructure.
研究领域:
材料科学
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能源化学
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催化科学
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产品关联
DOI
高影响因子
Materials Advances
·
2021
·Vol. 2
·期 12
·3881-3891
·
IF 0
Shenglong Gan,Min Deng,Dongfang Hou,Lei Huang,Xiu-qing Qiao,Dong-sheng Li
Optimization of cocatalysts is promising and of great significance in enhancing photocatalytic H2 generation from the perspective of understanding the charge separation, surface reaction kinetics, and distribution of active sites. Herein, we synthesize a class of well-formed hybrid photocatalysts by coupling amorphous NiSx films to ultrafine ZnCdS nanoparticles for greatly boosting the photocatalytic activity as well as the outstanding stability and repeatability. Under visible-light irradiation, the highest H2 evolution rate of the as-synthesized NiSx/ZnCdS photocatalyst achieved is 67.75 mmol g−1 h−1, which is 28.8 times higher than that of Pt/ZnCdS. Further detailed characterization reveals that the amorphous NiSx film as an excellent cocatalyst not only improves the spatial separation of the photoinduced carriers but also collects electrons and enlarges the reduction reaction space. This work could provoke interest in understanding the spatial charge migration in the cocatalyst system with an amorphous film structure, thus developing high-performance low-cost composite photocatalysts for H2 production.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
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