Small
·
2024
·
IF 13
Yang Ming,Zhixing Cheng,Shuo Shi,Jing Su,Weng-Fu Io,Hanbai Wu,Jiashen Li,Bin Fei
Nanoarchitectonics of semiconductors shed light on efficient photocatalytic hydrogen evolution by precisely controlling the surface microenvironment of cocatalysts. Taking cadmium zinc sulfide (CZS) nanoparticles as a target, the spontaneous modifications are conducted by interactions between surface Cd 2+ /Zn 2+ atoms and thiol groups in thioglycolic acid. The capping ligand impacts the semiconductor surface with a negative electronic environment, contributing to the full coverage of CZS by nickel-cobalt hydroxides (NiCo-LDHs) cocatalysts. The obtained core-shell CZS@NiCo-LDHs, possessing a shell thickness of ≈20 nm, exhibits a distinguished topology (S BET = 87.65m 2 g −1 ), long surface carrier lifetime, and efficient charge-hole separation. Further photocatalytic hydrogen evaluation demonstrates an enhanced H 2 evolution rate of 18.75 mmol g −1 h −1 with an apparent quantum efficiency of 16.3% at 420 nm. The recorded catalytic performance of the core-shell sample is 44.6 times higher than that of pure CZS nanospheres under visible light irradiation. Further density functional theory simulations indicate that sulfur atoms play the role of charge acceptor and surface Ni/Co atoms are electron donors, as well as a built-in electric field effect can be established. Altogether, this work takes advantage of strong S affinity from surface metal atoms, revealing the interfacial engineering toward improved visible-light-driven photocatalytic hydrogen evolution (PHE) activity.
研究领域:
材料科学
·
纳米技术
·
光化学
·
催化
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jin Dang,Jing Tian,Wenlong Liu,Shenyu Wang,Jiaqi Tan,HaoTian Han,Jiarun Li,Weibing Li
Most conventional photoelectrode materials lack electron storage capability, limiting their function to photoelectrochemical cathodic protection (PECCP) only under illumination and rendering it ineffective in dark conditions. This significantly restricts the application of PECCP in the corrosion protection of metallic materials. In this study, WO 3 /CdZnS heterojunction photoelectrodes with electron storage functionality were synthesized via a two-step hydrothermal method, overcoming a key limitation of previously reported PECCP photoelectrodes that cannot store electrons. The saucer-like WO 3 nanoplates (exhibiting nanorod-like structures with lengths of ∼2 μm) feature a loose and porous surface that increases the number of active sites and provides additional channels for the storage of photogenerated electrons. Meanwhile, the CdZnS composite extends the light absorption threshold to 539 nm, compared to 471 nm for pure WO 3 , and supplies photogenerated electrons to WO 3 . Under AM1.5 G illumination in 3.5 wt% NaCl solution, the WO 3 -2/CdZnS photoelectrode exhibited a photoinduced potential of 436 mV and a current density of 25.7 μA cm⁻ 2 . After 100 s of light exposure, the WO 3 -2/CdZnS photoelectrode stored a charge of 1.19 × 10⁻ 3 C, sufficient to provide time-delayed cathodic protection to 316 L stainless steel (316 L SS) for 4826 s. Furthermore, the photoelectrode achieved a 99.2 % bactericidal efficiency against Pseudomonas aeruginosa (P. aeruginosa) within 60 min of illumination and maintained 55.2 % efficiency in the dark following pre-illumination, thereby effectively preventing biofouling. The preparation of these dual-functional storage-type anticorrosion and antifouling photoelectrodes offers new insights for the anticorrosion and antifouling protection of marine equipment.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Tian,Feng Qian,Meijing Cao,Jiaqi Gong,Jiarun Li,Lei Wang,Minge Tian,Zhuoyuan Chen
Most of the photoelectrodes for photoelectrochemical cathodic protection (PECCP) technology reported at present cannot store electrons, leading to the inability to protect metals in the absence of light, which becomes the main defect that limits the practical application of PECCP . In this work, a Mo doping WO 3 /CdZnS heterojunction photoelectrode with electrons storage capability was prepared, by which the PECCP can be kept running in the absence of light. The result of theoretical calculation of density functional validates that Mo doping can introduce new doping levels into WO 3 , leading to modifications in the intrinsic electronic structure associated with increasing capacitance and conductivity. The compounding of CdZnS can not only broaden the light absorption threshold of the photoelectrode, but also charge the Mo-WO 3 . Besides, the construction of heterojunction also facilitates the oriented separation and migration of photogenerated carriers. The 0.3%Mo-WO 3 /CdZnS-2 composite photoelectrode with desirable capacity of electron storage can store the quantity of electric charge about 1.87 × 10 −3 C after 100 s illumination, which is about 1.5 times of WO 3 /CdZnS-2 without Mo doping. In the meanwhile, the persistent PECCP performance in the absence of light was also prolonged from 481 s to 584 s.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MATERIALS SCIENCE & ENGINEERING R-REPORTS
·
2024
·
IF 31.6
Jie Chen,Zhenzi Li,Haitao Yu,Xiuwen Wang,Ying Xie,Wei Zhou
Interface engineering is vital for promoting charge separation in photocatalysis. Herein, a twin crystal interface in Cd 0.3 Zn 0.7 S is engineered, which leads to a variation of the electric polarization along the interface and the formation of a periodic quantum well along z axis. The periodic quantum well could effectively facilitate the oriented charge separation and significantly reduce the diffusion distance simultaneously. Density functional theory (DFT) calculations confirm that Cd 0.3 Zn 0.7 S twin crystal possesses a relative low work function and an appropriate hydrogen adsorption Gibbs free energy (ΔG H* ), making each step of the cascaded hydrogen evolution reactions optimized. As a result, the resultant twin crystal exhibits an excellent visible light photocatalytic hydrogen evolution rate (13148.98 μmol·g −1 ·h −1 ), which is almost 10 and 30 times higher than those of CdS and ZnS. Importantly, it also shows a good stability because of the formation of twin crystal interface. In addition, the introduction of S vacancy defect results in narrowing the band gap and extending the photo-response to long wavelength region. Such a twin crystal interface engineering strategy provides a basic guideline for designing high-efficient photocatalysts with tunable electric polarization.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Junhui Yang,Wenlei Wang,Jinglin Yin,Yanmei Li,Ziyang Xiang,Yi Peng,Ying Yan,Jing Wang,Hongbo Xiao
In this study, a matrix composite material of CdZnS and α-FeOOH on carbon cloth (CZS@FeOOH@CC) was prepared by a hydrothermal method , and was used for the degradation of As(III). The composite material has good photocatalytic activity of removing As(III) in the presence of oxalate. CZS@FeOOH@CC can completely degrade 10 mg/L As(III) within 10 min under visible light irradiation. The influence factors of CZS@FeOOH@CC composite material on catalytic oxidation of As(III) were also studied in the oxalate system. The photocatalytic oxidation efficiency of As(III) is affected by the oxalate concentration in the reaction system, and the atmosphere plays a major role in the degradation of As(III). Under visible light, oxalate first combines with Fe(III) on the surface of iron oxide to form Fe(III)-oxalate complex, and then the Fe(III)-oxalate composite is activated to produce·C 2 O 4 − . In the presence of oxygen, Fe(II) readily reacts with O 2 and oxidizes to Fe(III). The introduction of CdZnS promoted the separation of interfacial electron holes, and accelerated the REDOX cycle of Fe(II)/Fe(III). This study provides a feasible and simple method for accelerating the catalytic removal of heavy metals from wastewater by iron-based materials.
研究领域:
环境科学
·
化学
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 10
·3074-3091
·
IF 2.936
Faizan Muhammad,Saeed Aamir,Song Piao,Zhang Ruirui,Liu Ruixia,Chang Zhi,Wu Liuzhu,Zhang Manyuan
Vanadium phosphorous oxide (VPO) catalysts have been recognized as heterogeneous catalyst for selective oxidation of low-carbon alkanes i.e., n -butane toward maleic anhydride. This process has widely gained attention globally due to its highly selective and cost-effective process. Herein, we employed Cd 0 . 2 Zn 0 . 8 S as a support for the VPO catalyst and evaluated its n -butane catalytic performance. Compared to the unpromoted catalyst (Blank-VPO), a higher n -butane conversion and MA yield were successfully obtained from the promoted catalyst (Cd 0 . 2 Zn 0 . 8 S@VPO). Interestingly, it reduces the byproducts, i.e., CO 2 and CO emission. Characterization methods such as TGA, XRD, EDS, SEM, FTIR, NH 3 -TPD, XPS, TEM, and Raman spectroscopy were used to characterize the Cd 0 . 2 Zn 0 . 8 S, VPO precursor and catalyst. Graphical Abstract
研究领域:
化学工程
·
催化材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Beini Gong,Yonghong Lu,Pingxiao Wu,Zhujian Huang,Yajie Zhu,Zhi Dang,Nengwu Zhu,Guining Lu,Junyi Huang
For enhanced photocatalytic performance of visible light responsive CdZnS, a series of Cd 0.5 Zn 0.5 S solid solutions were fabricated by different methods. It was found that the semiconductor obtained through the precipitation-hydrothermal method (CZS-PH) exhibited the highest photocatalytic hydrogen production rate of 2154 μmol h −1 g −1 . The enhanced photocatalytic hydrogen production of CZS-PH was probably due to stacking fault formation as well as narrow bandgap, a large surface area and a small crystallite size . Based on this, carbon nanotubes modified with Cu 2+ (CNTs (Cu)) were used as a cocatalyst for CZS-PH. The addition of CNTs (Cu) enhanced notably the absorption of the composites for visible light. The highest photocatalytic hydrogen production rate of the Cd 0.5 Zn 0.5 S-CNTs (Cu) composite was 2995 μmol h −1 g −1 with 1.0 wt.% of CNTs (Cu). The improvement of the photocatalytic activity by loading of CNTs (Cu) was not due to alteration of bandgap energy or surface area, and was probably attributed to suppression of the electron-hole recombination by the CNTs, with Cu 2+ anchored in the interface optimizing the photogenerated electron transfer pathway between the semiconductor and CNTs. We report here the successful combination of homojunction and heterojunction in CdZnS semiconductor, which resulted in promotion of charge separation and enhanced photocatalytic activity.
研究领域:
材料科学
·
环境科学
·
化学工程
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 23
·5383
·
IF 3.2
Ziming Zhou,Dexia Zhou,Ning Li,Ya Liu,Zhaobing Tang,Siqi Jia,Xiao Wei Sun
As a core component of emerging quantum-dot display technology, the stability of quantum-dot materials is crucial to determining the performance of quantum-dot photoluminescent diffuser plates. This study successfully synthesized high-stability thick-shell CdZnSeS/CdZnS/ZnS core–shell structured green-alloy quantum dots suitable for photoluminescent diffuser plates, providing an innovative solution for performance breakthroughs in this field. Through orthogonal experimental design, the synthesis parameters of the CdZnSeS alloy core were precisely optimized to achieve an ideal balance in emission wavelength, full width at half maximum (FWHM), and quantum yield (QY). Furthermore, by systematically adjusting ligands and synthesis parameters, a thick-shell CdZnSeS/CdZnS/ZnS core–shell structure was constructed, significantly improving the stability of the quantum dots. Critically, the replacement of the original oleic-acid ligands with tetradecylphosphonic-acid (TDPA) ligands at high temperature doubled the stability of the quantum-dot diffuser plates. Under extreme accelerated-aging conditions such as intense blue light, high temperature, and high humidity, the T90 lifetime of the diffuser plate exceeded 1000 h, and the xy chromaticity coordinate shift was strictly controlled within 1%, fully meeting the stringent commercial requirements. This achievement not only overcomes the stability bottleneck of quantum dots in the application of photoluminescent diffuser plates but also paves the way for their large-scale commercialization, promising to promote the development of display technology toward higher color gamut and longer lifetimes.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
显示技术
·
量子点合成
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123686
·
IF 7.5
Dekang Wang,Dong Luo,Mingliang Chen,Ping Lu,Chao Liu,Shiliang Wu,Jun Hu
The selective cleavage of β-O-4 linkages in lignin under mild conditions remains a major challenge for the sustainable production of aromatic chemicals. In this work, CdZnS photocatalysts were synthesized via co-precipitation (CP), hydrothermal (HT), and template-assisted solvothermal ion-exchange (TP) methods and applied to the photocatalytic cleavage of the β-O-4 linkage in 2-phenoxy-1-phenylethanol (PP-ol). Cd 0.5 Zn 0.5 S-CP exhibited outstanding photocatalytic performance under visible-light irradiation, achieving complete conversion of PP-ol with high molar yields of phenol and acetophenone reaching 92.2% and 86.6%, respectively. Comprehensive characterizations revealed that the superior activity of Cd 0.5 Zn 0.5 S-CP originates from the synergistic interplay between its suitably negative conduction band potential (−1.26 eV) and a mesoporous structure with a large accessible surface area. In contrast, Cd 0.5 Zn 0.5 S-HT showed lower activity mainly because of its limited accessible surface area. Cd 0.5 Zn 0.5 S-TP also exhibited inferior performance, which was mainly attributed to its overly positive conduction band potential (−0.60 eV) and insufficient reductive driving force for C–O bond cleavage. Mechanistic investigations demonstrate that the reaction proceeds via a self-hydrogen transfer pathway, with photogenerated electrons playing a dominant role in driving C β –O bond cleavage. This study provides fundamental insights into the rational design of efficient photocatalysts for lignin valorization under mild conditions.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 1
·488-494
·
IF 1.483
Ma Qian,Yang Fanghong,Zhu Yuanna,Wang Junpeng,Che Quande,Shi Ruixia,Yang Ping
Red to near-infrared (NIR)-emitting ternary-alloyed CdTe
x
Se1−x
(x = 0–0.3) quantum dots (QDs) with tetrapod and dot morphologies have been synthesized by a facile method using oleic acid (OA) as single capping agent. The controlled
dot-shaped and tetrapod-shaped CdTe
x
Se1−x
QDs can be successfully obtained by adjusting the content of Te element. It is clear that CdTe
x
Se1−x
QDs display the tunable emission peaks from the visible light
(613.4 nm) to the NIR range (791.6 nm). With an inorganic CdZnS shell coated on the surface of CdTe0.1Se0.9 cores, the stability and PL efficiency of the resulting core/shell QDs can be improved dramatically, accompanied with the red-shift of emission peaks to longer
wavelength (795.6 nm). Peculiarly, a large blue shift of emission spectrum of CdTe0.3Se0.7/CdZnS core/shell QDs is observed, which is mainly ascribed to the shrink of the size of QDs by the fracture of tetrapod arms.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Changxin Yuan,Jinlong Li,Yan Zhuang,Dongxuan Guo,Shuang Meng,Dantong Zhang,Xue Yang,Guozhe Sui
Photocatalytic hydrogen evolution represents a crucial pathway for sustainable energy conversion, where constructing efficient heterojunctions and employing strategic doping are key to enhancing performance. Herein, a Ni-doped CdZnS/Ti 3 C 2 T x Schottky heterojunction was constructed via a hydrothermal method to enhance photocatalytic hydrogen evolution. Ni doping introduces sulfur vacancies that improve charge conductivity, while coupling with Ti 3 C 2 T x MXene forms a Schottky junction that directs interfacial electron transfer and suppresses recombination. Density functional theory (DFT) calculations confirm that sulfur vacancies and the Schottky barrier act synergistically to optimize charge dynamics, and that Ti 3 C 2 T x shifts the d-band center of Ni toward the Fermi level of the sample, promoting hydrogen desorption process. The optimized Ni-CdZnS/Ti 3 C 2 T x composite exhibits a high visible-light driven hydrogen evolution rate of 13.67 mmol g −1 h −1 — 3.73-folds that of pristine CdZnS — along with an apparent quantum efficiency (AQY) of 20.15% at 365 nm, while maintaining favorable stability. This work demonstrates an effective strategy integrating defect engineering and Schottky junction design for efficient solar hydrogen evolution.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yuqi Wang,Yu Li,Kaige Huang,Mengmeng Ma,Zhanwei Shen,Aiwei Tang,Xiaomin Dou,Shizhong Yue,Zhijie Wang
Simultaneous achievement of green hydrogen production and pollutant removal is an attractive approach for mitigating energy scarcity and environmental pollution. This work successfully constructed an all-solid-state CdZnS/CNT/CuCo 2 S 4 Z-scheme heterojunction via a combined hydrothermal and solvent evaporation approach, enabling highly efficient bifunctional photocatalytic performance in hydrogen production and tetracycline removal. Benefiting from visible light excitation, the tailored CdZnS/CNT/CuCo 2 S 4 heterostructure delivered an outstanding photocatalytic H 2 generation activity, as high as 10.29 mmol g −1 h −1 . The catalytic performance was 3.3 times superior to pristine CdZnS. Moreover, it achieved 92.3% degradation of tetracycline within 30 min. The boosted photocatalytic performance originates from the Z-type charge transmission pathway supported by CNT electron bridges, significantly promoting carrier separation and transport. Excited electrons in CdZnS reduce water to produce hydrogen, while the holes in CuCo 2 S 4 degrade tetracycline. This study paves a rational pathway for the fabrication of Z-scheme heterojunction photocatalysts that employ carbon nanotubes as electron mediators.
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高影响因子
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