MATERIALS LETTERS
·
2013
·
IF 2.224
Hao Wei,Xinglong Ren,Ziyi Han,Tongtong Li,Yanjie Su,Liangming Wei,Fengsong Cong,Yafei Zhang
z We reported that Zn x Cd 1− x S (ZnCdS) nanorods could be synthesized via a facile, nontoxic one-pot method. Structural and optical properties of ZnCdS nanorods were characterized by relevant equipments. The x value (Zn/(Zn+Cd)) could be altered across the entire range from 0.21 to 0.89 by changing the ratio of cation precursor contents. The band gap energy ( E g ) could be tuned linearly from 2.68 eV to 3.59 eV with respect to x . We also performed first-principles calculations to prove the experimental variation trend of band gap energy. Results showed that the replacement between Zn and Cd influenced the distribution of the electronic structure, and therefore determined the band gap energy.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Chenyang Zhang,Wanni Wang,Mengli Zhao,Jun Zhang,Zhengbao Zha,Sheng Cheng,Haiwu Zheng,Haisheng Qian
Rational design of photocatalysts with heterostructure is of scientific and technological interest for taking full advantage use of solar energy. Here we demonstrate a facile method to fabricate Zn 0.5 Cd 0.5 S/Bi 2 S 3 composite nanospheres , in which Bi 2 S 3 nanorods grown on the surface of Zn 0.5 Cd 0.5 S nanospheres. The as-prepared Zn 0.5 Cd 0.5 S@ZnS core-shell nanospheres play a vital role in formation of the Zn 0.5 Cd 0.5 S@Bi 2 S 3 composite nanospheres. The Zn 0.5 Cd 0.5 S/Bi 2 S 3 composites show both excellent photocatalysis and photothermal effect. Nanorods-like Bi 2 S 3 show wide optical absorption from visible to near infrared light and photocurrent response, which enable enhanced full spectrum absorption of the heterostructured photocatalyst and photocurrent for overall photocatalytic performance. Additionally, Bi 2 S 3 nanorods with photothermal effect would synergistically increase the temperature of the micro-environment around the catalysts of Zn x Cd 1−x S. Thus, the Zn 0.5 Cd 0.5 S/Bi 2 S 3 composites exhibit a little better photocatalytic activity than that of pure Zn 0.5 Cd 0.5 S. The present study provides a promising strategy for the rational design of efficient sulfide semiconductor heterojunction catalysts for making the utmost of solar fuels in dealing with organic pollutants from wastewater.
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Catalysts
·
2025
·Vol. 15
·期 3
·266
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IF 4
Lei Yang,Lihui Wang,Han Xiao,Di Luo,Jiangzhi Zi,Guisheng Li,Zichao Lian
The efficient separation of photo-generated electrons and holes is significantly importance for enhancing photocatalytic performance. However, there are few reports on precisely constructing interfaces within a single nanocrystal to investigate the mechanism of photoinduced carrier transfer. In this study, nanorod heterodimer-structured CuS/ZnxCd1−xS heteronanocrystals (CuS/ZnCdS HNCs) were successfully synthesized as a typical model to explore the photoinduced carrier dynamics in the photocatalytic hydrogen evolution reaction (HER). The CuS/ZnCdS HNCs exhibited a photocatalytic hydrogen evolution activity of 146 mmol h⁻1g⁻1under visible light irradiation, which is higher than most reported values. Moreover, after 15 h of hydrogen production cycling tests, we found that the material maintained high hydrogen production performance, indicating excellent stability. The CuS/ZnCdS HNCs achieved an apparent quantum yield (AQY) of 69.2% at 380 nm, which is the highest value reported so far for ZnCdS- or CuS-based photocatalysts. The remarkable activity and stability of the CuS/ZnCdS HNCs were attributed to the strong internal electric field (IEF) and Z-scheme mechanism, which facilitate efficient charge separation, as demonstrated by in situ X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses. This discovery provides a new approach for constructing Z-scheme heterogeneous copper-based nanocomposites within nanocrystals and offers guidance for improving photocatalytic activity.
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·42546-42556
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IF 7.8
Liu Yingjie,Chen Song,Zu Bingqian,Bao Liping,Liu Tian,Chi Jian,Chen Jilong,Zhou Jingtao,Wu Liang
Solar-driven photoreforming of plastic waste into hydrogen offers a promising solution to simultaneously address environmental pollution and sustainable fuel production. However, developing efficient visible-light photocatalysts that couple plastic oxidation with proton reduction for green H 2 generation is still a challenge. Herein, a series of Zn x Cd 1- x S (ZCS) nanoplates (NPs) is rationally synthesized via a cation exchange strategy with Cu 1.8 S NPs serving as sacrificial templates and used for efficient evolution of H 2 from waste plastic. Among these, ZCS-5 NPs achieve an optimal balance between visible-light absorption and redox driving force, delivering a high hydrogen evolution rate of 39.81 mol g –1 h –1 under visible light, outperforming their binary CdS and ZnS NPs. Notably, ZCS-5 NPs also enabled efficient photoreforming of plastic substrates, achieving H 2 evolution rates of 14.98 and 2.28 mol g –1 h –1 from polylactic acid and polyethylene terephthalate under mild aqueous conditions, respectively. Overall, this work presents a potential approach for solar-driven plastic upcycling and green hydrogen generation.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 20
·8101-8108
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IF 8.067
Meiling Xu,Chaomin Gao,Shan Yao,Shubo Sun,Lina Zhang,Kui Li,Xin Cheng
Facilitating the efficient separation of charge carriers is vitally crucial to achieving highly effective photocatalytic intermediate water splitting without any sacrificial reagents in pure water. Herein, the directional modulation separation of charge carrier strategy is proposed for Zn0.5Cd0.5S based on MOF-derived Co@NC and Co–Pi serving as dual charge transfer materials. The Co@NC acts as the electron transporting material to capture electrons and Co–Pi serves as the hole transporting material to extract holes, achieving the efficient separation of charge carriers and dramatically enhancing the photocatalytic performance. Moreover, the improved specific surface area can also provide more abundant active sites. The optimized Co@NC/Zn0.5Cd0.5S/Co–Pi sample achieved yields of H2 and H2O2 of up to 613.8 and 592.7 μmol h−1 g−1 in pure water, which are 13.2 and 14.4 times higher than that of pristine Zn0.5Cd0.5S, accompanied by a notable apparent quantum efficiency of 2.73% at 420 nm and the longest photocatalytic stability for 90 h. This work illustrates the importance of charge carrier separation to the photocatalytic performance and paves the way for designing highly efficient photocatalytic systems without sacrificial reagents.
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RSC Advances
·
2021
·Vol. 11
·期 35
·21642-21650
·
IF 3.361
Jing Dong,Wenjian Fang,Weiwei Xia,Qihong Lu,Xianghua Zeng
Hydrogen evolution from water using solar energy is regarded as a most promising process, thus, exploring efficient photocatalysts for water splitting is highly desirable. To avoid the rapid recombination of photogenerated electrons and holes in CdZnS semiconductors, ZnxCd1−xS/ZnS composites were synthesized via a one-step hydrothermal method and then annealed at 400 °C for 60 min under argon flow. ZnxCd1−xS/ZnS composites are composed of ZnS nanosheets decorated with ZnxCd1−xS nanorods, and TEM and UV-vis absorption spectra confirm the formation of the heterostructure between ZnxCd1−xS nanorods and ZnS nanosheets. Because of the well-matched band alignment, stronger optical absorption and larger carrier density, Zn0.2Cd0.8S/ZnS has the highest hydrogen production, with a photocatalytic hydrogen production rate up to 16.7 mmol g−1 h−1 under visible light irradiation. Moreover, the photocatalyst also exhibits high stability and good reusability for hydrogen production reaction. The facile and efficient approach for ZnS based heterostructures could be extended to other metal compound materials.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Fuyan Kang,Cai Shi,Yeling Zhu,Malin Eqi,Junming Shi,Min Teng,Zhanhua Huang,Chuanling Si,Feng Jiang,Jinguang Hu
The global commitment to pivoting to sustainable energy and products calls for technology development to utilize solar energy for hydrogen (H 2 ) and value-added chemicals production by biomass photoreforming. Herein, a novel dual-functional marigold-like Zn x Cd 1 -x S homojunction has been the production of lactic acid with high-yield and H 2 with high-efficiency by selective glucose photoreforming. The optimized Zn 0.3 Cd 0.7 S exhibits outstanding H 2 generation (13.64 mmol h −1 g −1 ), glucose conversion (96.40%), and lactic acid yield (76.80%), over 272.80 and 19.21 times higher than that of bare ZnS (0.05 mmol h −1 g −1 ) and CdS (0.71 mmol h −1 g −1 ) in H 2 generation, respectively. The marigold-like morphology provides abundant active sites and sufficient substrates accessibility for the photocatalyst, while the specific role of the homojunction formed by hexagonal wurtzite (WZ) and cubic zinc blende (ZB) in photoreforming biomass has been demonstrated by density functional theory (DFT) calculations. Glucose is converted to lactic acid on the WZ surface of Zn 0.3 Cd 0.7 S via the photoactive species O 2 − , while the H 2 is evolved from protons (H + ) in H 2 O on the ZB surface of Zn 0.3 Cd 0.7 S. This work paves a promising road for the production of sustainable energy and products by integrating photocatalysis and biorefine.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Mengxue Chen,Khalid Umer,Bonan Li,Zhexu Li,Kongming Li,Wanjun Sun,Yong Ding
The growing concern over the rapid consumption of fossil fuels has spurred scientists to seek environment-friendly and sustainable energy alternatives. The utilization of photocatalytic water splitting shows great potential in generating environmentally friendly hydrogen energy. Zirconium-based porphyrin MOF-545 has drawn extensive attention in photocatalysis since it has strong light absorption and fast electron transfer capability. A series of Zr-based metalloporphyrins containing different metals, MOF-545M (M = Co, Ni, Cu, Zn), were synthesized and assembled with solid solution Zn x Cd 1-x S (ZCS) nanoparticle to develop the corresponding of hybrid photocatalysts , ZCS/MOF-545M. Various characterizations show that introducing the porphyrin MOF-545Co not only improve the visible light response range of Zn 0.5 Cd 0.5 S (ZCS-0.5) but also enhance the carrier separation efficiency of ZCS-0.5. The carrier transfer direction during the reaction was confirmed by surface photovoltage spectroscopy and shows the formation of S-scheme. Under visible light irradiation , the hybrid photocatalyst ZCS-0.5/MOF-545Co exhibits a high H 2 evolution rate of 148 μmol h −1 , with increases of 52.8, 22.9 and 6.5 times than those of bare ZnS, CdS and ZCS-0.5, respectively. The present work gives a strategy for erecting S-scheme heterojunction to inhibit the photocorrosion of metal sulfides and enhancement the carrier separation efficiency.
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Materials Research Express
·
2025
·Vol. 12
·期 4
·045901
·
IF 2.2
Yuqi Dong,Qing-an Qiao,Ruping Wang,Jiahua Li,Honglan Cai,Hongwei Gao,Yanbin Xu
With different Zn2+/Cd2+ ratios, ZnxCd1−xS (x = 0.1–0.9) were prepared by a hydrothermal method. The structural and optical properties of them were analyzed via XRD, SEM, XPS, BET, UV–Vis DRS and PL characterization tests. The results from the degradation of methylene blue (MB), rhodamine B (RhB) and tetracycline (TC) under visible light showed that the photocatalytic performance of ZnxCd1−xS (x = 0.1–0.9) series were superior to that of pure ZnS and CdS, and Zn0.6Cd0.4S was the best one. The photocatalytic processes were tested in different water sources, and the data implied that the degradation efficiency of dyes and TC by Zn0.6Cd0.4S in sea water, lake water, and tap water differed a little to the cases in deionized water. The degradation ratio of MB, RhB and TC could reach 98.90%, 98.99% and 91.95% by Zn0.6Cd0.4S. The photocatalytic mechanism was further revealed by active species capture experiments and theoretical calculations. The results indicated that the introduction of Cd2+ led to a decreased band gap and an enhanced response to visible light. The photogenerated electron–hole pair separation efficiency was increased, and the electrons jumped to the conduction band to react on the catalyst surface for the degradation. The effect of the solution pH was studied as well and revealed that a natural pH was preferred. All the data indicated that Zn0.6Cd0.4S exhibited excellent photocatalytic performance and good stability which could be a promising candidate for the degradation of organic pollutants.
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DALTON TRANSACTIONS
·
2026
·
IF 3.3
Yuanlin Huang,Chen Lin,Mengxin Liu,Xinan Shi,Daocheng Pan
Metal oxide nanoparticles (NPs), such as ZnO, SnO2 , and TiO2 NPs, are widely used as electron transport layers (ETLs) in quantum dot light-emitting diodes (QLEDs). In comparison, the application of metal sulfides in QLED ETLs remains relatively unexplored. Herein, we report a bandgap-tunable ZnxCd1-xS alloyed thin film as a promising ETL material for QLEDs. Owing to its suitable electron mobility and high conductivity, the ZnxCd1-xS ETL enables highly efficient charge transport. Furthermore, the bandgap of the ZnxCd1-xS ETL can be continuously tuned from 2.48 eV to 3.83 eV by adjusting the Zn/Cd ratio, thereby allowing favorable energy-level alignment with adjacent functional layers. As a result, the red inverted QLED device fabricated with a Zn0.1Cd0.9S ETL achieves a maximum external quantum efficiency (EQE) of 16.0%, a peak current efficiency of 22.1 cd A -1 , and a maximum luminance of 103,909 cd m -2 .These findings demonstrate that ZnxCd1-xS is a highly promising ETL candidate for high-performance QLEDs and may open a new pathway for designing efficient QLEDs based on metal-sulfide ETL.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Xing-Liang Yin,Lei-Lei Li,Yao Lu,Shu-Rui Han,Jian-Min Dou,Da-Cheng Li
A novel pomegranate-like Zn x Cd 1-x S@MoS 2 core@shell nano-heterostructure was synthesized by using a facile one-pot solvothermal approach. In this architecture, the MoS 2 nanosheet and well-dispersed Zn x Cd 1-x S nanospheres serve as peel and seeds, respectively. While maintaining the advantages of nanoscale materials, such as high ratio of surface to volume and a relatively short charge transportation path, this unique structure also provides some additional positive features for H 2 generation application: (1) the intimate contact of MoS 2 and Zn x Cd 1-x S contributes to the well-defined heterostructure formation and thus enhances H 2 generation efficiency; (2) the MoS 2 nanosheets with amorphous-like structures providing numerous active sites for H 2 generation; (3) the multiple pore nano structure promotes mass transfer and allows the active site through exposure; (4) the coated MoS 2 with superior chemical stability protects Zn x Cd 1-x S from photocorrosion and disaggregation. With those advantages, the Zn x Cd 1-x S@MoS 2 heterostructure exhibits a high photocatalytic H 2 evolution rate of 28.22 mmol g −1 h −1 far exceeding that of pristine Zn x Cd 1-x S by a factor of more than 56 and maintains long term stability with no obvious active deterioration in 24 h performance evaluation. Moreover, the one-pot synthesis of this heterostructure significantly saves time and energy, rendering it cost-efficiency. The demonstrated strategy here could have great significance in the design and fabrication of the low-cost and high-efficient heterogeneous photocatalysts .
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yudong Guo,Xiya Chen,Yuxin Liu,Zhenjun Chen,Peiyuan Guo,Dongxiang Luo,Menglong Zhang,Xiao Liu
In a dual-functional lignin valorization system, a harmonious oxidation and reduction rate is a prerequisite for high photocatalytic performance. Herein, an efficient and facile ligand manipulating strategy to balance the redox reaction process is exploited via decorating the surface of the CdS@ZnxCd1–xS@ZnS gradient-alloyed quantum dots with both inorganic ligands of hexafluorophosphate (PF6–) and organic ligands of mercaptopropionic acid (MPA). Inorganic ion ligands in this system provide a promotion for intermediator reduction reactions. By optimizing the ligand composition on the quantum dot surface, we achieve precise control over the extent of oxidation and reduction, enabling selective modification of reaction products; that is, the conversion rate of 2-phenoxy-1-phenylethanol reached 99%. Surface engineering by regulating the ligand type demonstrates that PF6– and thiocyanate (SCN–) inorganic ion ligands contribute significantly toward electron transfer, while MPA ligands have beneficial effects on the hole-transfer procedure, which is predominantly dependent on their steric hindrance, electrostatic action, and passivation effect. The present study offers insights into the development of efficient quantum dot photocatalysts for dual-functional biomass valorization through ligand design.
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