Nanomaterials
·
2024
·Vol. 14
·期 11
·989
·
IF 4.4
Geyu Jin,Yicheng Zeng,Xiao Liu,Qingya Wang,Jing Wei,Fangze Liu,Hongbo Li
Semiconductor nanorods (NRs) have great potential in optoelectronic devices for their unique linearly polarized luminescence which can break the external quantum efficiency limit of light-emitting diodes (LEDs) based on spherical quantum dots. Significant progress has been made for developing red, green, and blue light-emitting NRs. However, the synthesis of NRs emitting in the deep red region, which can be used for accurate red LED displays and promoting plant growth, is currently less explored. Here, we report the synthesis of deep red CdSeTe/CdZnS/ZnS dot-in-rod core/shell NRs via a seeded growth method, where the doping of Te in the CdSe core can extend the NR emission to the deep red region. The rod-shaped CdZnS shell is grown over CdSeTe seeds. By growing a ZnS passivation shell, the CdSeTe/CdZnS/ZnS NRs exhibit a photoluminescence emission peak at 670 nm, a full width at a half maximum of 61 nm and a photoluminescence quantum yield of 45%. The development of deep red NRs can greatly extend the applications of anisotropic nanocrystals.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 34
·28263-28269
·
IF 3.289
Xiumin Ma,Quantong Jiang,Weimin Guo,Meng Zheng,Weichen Xu,Fubin Ma,Baorong Hou
In this study, a sandwich-structured C3N4/Au/CdZnS photocatalyst with Au nanoparticles sandwiched between C3N4 and CdZnS was fabricated. The results showed that there was a 6.3 mmol g−1 increase of hydrogen production for C3N4/Au/CdZnS photocatalyst compared to C3N4/CdZnS in 4 h. The photoinduced I–t curve, electrochemical impedance spectrum (EIS), photogenerated electron lifetime and photoluminescence spectra showed that the photocatalytic ability of the composite was enhanced by anchoring Au as the electron transfer mediator between C3N4 and CdZnS through the Z-scheme charge-carrier transfer mechanism. Au functioned as an electron transition mediator, which could induce a combination between photogenerated electrons and holes in the CdZnS and C3N4, respectively. These photogenerated holes of CdZnS can be involved in the S2−/SO32− oxidation process and the electrons from the C3N4 surface might be involved in the water to hydrogen reduction reaction, thus enhancing the photocatalysis performance of C3N4/Au/CdZnS photocatalyst.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Meiqing Chen,Pingxiao Wu,Yajie Zhu,Shanshan Yang,Yonghong Lu,Zhang Lin
In order to enhance the visible light-driven photocatalytic H 2 production activity of CdZnS, an ethylenediamine-assisted hydrothermal pathway was used to synthesize CdxZn1-xS(en) with different Cd/Zn molar ratios . It was found out that the prepared Cd 0.5 Zn 0.5 S(en) possessed the highest photocatalytic H 2 production rate of 13539.0 μmol h −1 g −1 that was higher than that of CdZnS. The key to this achievement could be ascribed to the stacking faults formation, the optimum band gap with conduction band position and small crystallite size. Based on this, Cd 0.5 Zn 0.5 S(en) was modified by NiS for further improving the activity. The obtained Cd 0.5 Zn 0.5 S(en) NiS with NiS loading content of 0.25 wt% exhibited much higher photocatalytic H 2 production rate, reaching up to 38187.7 μmol h −1 g −1 that were among the highest efficiencies for semiconductor photocatalysts ever reported. It was confirmed that the nanosized NiS anchored on Cd 0.5 Zn 0.5 S(en) interface, acting as electron trapping sites, attributed to the spatial suppressions of electron-hole recombination. Meanwhile, the NiS loaded on the surface optimized the photogenerated electron transfer pathway between the semiconductor materials that gives rise to significantly enhanced photocatalytic activity . This study would put forward a facile method for developing high photocatalytic activity and low-cost catalytic material for H 2 production, which provide a new thought to address the global energy crisis and the environmental contamination.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 36
·2102307
·
IF 13.281
Hongli Yang,Jiaqi Tang,Yong Luo,Xiaoqiang Zhan,Zhao Liang,Lan Jiang,Huilin Hou,Weiyou Yang
The development of efficient visible-light-driven photocatalysts is one of the critically important issues for solar hydrogen production. Herein, high-efficiency visible-light-driven In 2 O 3 /CdZnS hybrid photocatalysts are explored by a facile oil-bath method, in which ultrafine CdZnS nanoparticles are anchored on NH 2 -MIL-68-derived fusiform In 2 O 3 mesoporous nanorods. It is disclosed that the as-prepared In 2 O 3 /CdZnS hybrid photocatalysts exhibit enhanced visible-light harvesting, improves charges transfer and separation as well as abundant active sites. Correspondingly, their visible-light-driven H 2 production rate is significantly enhanced for more than 185 times to that of pristine In 2 O 3 nanorods, and superior to most of In 2 O 3 -based photocatalysts ever reported, representing their promising applications in advanced photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yumin Li,Qingping Dai,Zhibin Qiu,Yuanmao Pu,Hong Tian,Jun Wei,Bing Lv,Wenzhong Wang
Photoelectrochemical (PEC) performance of semiconductor photoanode can be significantly improved by regulating the energy band alignment to promote carrier separation. This study demonstrates the first application of CdZnS (CZS) nanoparticles to modify FeVO 4 (FVO) nanostructure phoyoanode for PEC water splitting . The constructed FVO/CZS photoanode exhibits significantly enhanced PEC performance with a zero-bias solar-driven photocurrent density of 1.00 mA/cm 2 , which is 11 times and 4.5 times that of unmodified FVO and CZS, respectively. The Tests of the optical absorption and electrochemical spectroscopy demonstrate that the modification of CZS nanoparticles not only improves the light harvesting ability of the FVO/CZS heterojunction nanostructures in the wavelength of 300–500 nm but also establishes a type II band alignment between the interface of FVO and CZS that is conducive to the transport and separation of the charge carriers and prolongs charge lifetime. Consequently, synergistic actions of the improved light harvesting capacity, effective charge transport and separation and the prolonged carrier lifespan enable the designed and fabricated FVO/CZS heterojunction photoanode to get substantially augmented PEC water splitting performance. This work supplies an innovative guidance for designing FVO-based photoanodes to improve photoelectric conversion behavior from the perspective of interface engineering.
研究领域:
材料科学
·
能源工程
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2016
·
IF 11.553
Lihua Yao,Ding Wei,Yuanman Ni,Dongpeng Yan,Changwen Hu
The construction of new semiconductor photocatalysts toward high-efficiency splitting water has played an important role in developing sustainable and clean hydrogen energy . In this work, new type of micro/nano-sized hybrids were synthesized based on the assembly of 0D Cd 0.5 Zn 0.5 S quantum dots (QDs, size: ca. 5 nm) onto 2D graphitic carbon nitride ( g -C 3 N 4 ) ultrathin microribbons (thickness: ca. 4 nm) via an in-situ growth hydrothermal method . The Cd 0.5 Zn 0.5 S 32 wt%@C 3 N 4 composite exhibits the highest visible-light-driven H 2 -generation rate of 33.41 mmol h −1 g −1 without any noble-metal as cocatalyst , and the apparent quantum efficiency is 46.65% at 450 nm. Such H 2 -generation rate is higher than the pristine g -C 3 N 4 and Cd 0.5 Zn 0.5 S by a factor of 27.39 and 9.18 respectively, which is significantly enhanced compared with most as-reported noble-metal-free semiconductor catalysts to date. In addition, compared with the pristine Cd 0.5 Zn 0.5 S, the photocatalytical stability of Cd 0.5 Zn 0.5 S QDs@C 3 N 4 is highly improved. The enhanced H 2 -generation performance can be attributed to the well-matched energy level and strong electronic coupling between two components at the g- C 3 N 4 interface as well as enhanced visible-light absorption. The uniform dispersion of Cd 0.5 Zn 0.5 S QDs onto the g -C 3 N 4 ultrathin microribbons also facilitates the depression of electron-hole recombination from potential aggregation of Cd 0.5 Zn 0.5 S. Therefore, this work supplies an effective way to obtain promising 2D micro/nanostructures for high-efficiency visible light-induced H 2 -generation.
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
Nanomaterials
·
2023
·Vol. 13
·期 15
·2261
·
IF 5.3
Zelin Li,Yang Zhao,Qinglin Deng,Xuhui Zhu,Yipeng Tan,Ziwen Feng,Hao Ji,Shan Zhang,Lingmin Yao
Using natural light energy to convert water into hydrogen is of great significance to solving energy shortages and environmental pollution. Due to the rapid recombination of photogenerated carriers after separation, the efficiency of photocatalytic hydrogen production using photocatalysts is usually very low. Here, efficient CdZnS nanoparticles@Ti3C2TxMXene nanosheet heterojunction photocatalysts have been successfully prepared by a facile in situ growth strategy. Since the CdZnS nanoparticles uniformly covered the Ti3C2TxMxene nanosheets, the agglomeration phenomenon of CdZnS nanoparticles could be effectively inhibited, accompanied by increased Schottky barrier sites and an enhanced migration rate of photogenerated carriers. The utilization efficiency of light energy can be improved by inhibiting the recombination of photogenerated electron-hole pairs. As a result, under the visible-light-driven photocatalytic experiments, this composite achieved a high hydrogen evolution rate of 47.1 mmol h−1g−1, which is much higher than pristine CdZnS and Mxene. The boosted photocatalytic performances can be attributed to the formed heterojunction of CdZnS nanoparticles and Ti3C2TxMXene nanosheets, as well as the weakened agglomeration effects.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
Science China-Materials
·
2022
·Vol. 66
·期 3
·1042-1052
·
IF 8.64
Zhang Weijie,Zhao Shunshun,Qin Hongjie,Zheng Qiling,Zhang Penghui,Li Xiaojuan,Li ChuanLin,Wang TongKai,Li Na,Zhang Shouwei,Xu Xijin
Using photocatalytic hydrogen evolution (PHE) technology is a powerful way to solve the energy shortage. In this study, a hexagonal hollow tubular nitrogen-doped carbon (N−C)-coated In 2 O 3 /CdZnS heterojunction photocatalyst was in situ synthesized using a simple oil bath heating method. Results show that the PHE rate of N−C/In 2 O 3 /CdZnS (∼22.87 µmol h −1 ) is ∼2.4 times that of pristine CdZnS (∼9.49 µmol h −1 ) and ∼54.5 times that of pristine In 2 O 3 (∼0.42 µmol h −1 ). After four cycles, the PHE rate can still retain more than 90% of the original. Its excellent photocatalytic performance is mainly attributed to the following aspects: (1) the N−C layer acts as an electron transport bridge, which ensures the efficient electron transfer of the photocatalytic reaction; (2) the hollow tubular structure enhances the light reflection and absorption; (3) the N−C/In 2 O 3 /CdZnS heterostructure improves the carrier recombination and photocorrosion; (4) the large specific surface area and mesoporous structure provide a large number of reactive sites. This study provides a novel idea for designing visible-light-type heterojunction catalysts.
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
Optical Materials Express
·
2020
·Vol. 10
·期 5
·1232-1240
·
IF 3.064
Bing Xu,Bing Xu,Tingting Zhang,Tingting Zhang,Xinru Lin,Huimin Yang,Xiao Jin,Xiao Jin,Zhen Huang,Zhen Huang,Zhenghe Zhang,Zhenghe Zhang,Dongyu Li,Dongyu Li,Qinghua Li,Qinghua Li
High quality blue emitting quantum dots (QDs) are regarded as promising nanomaterials for lasers, photovoltaic cells and displays. However, few reports realize high photoluminescence quantum yield (PL QY), narrow emission band width and pure blue emitting (450∼460 nm) simultaneously. Herein we propose a facile one-step synthesis of thick shell blue emitting CdZnS/ZnS QDs. ZnS shell was overcoated on the prepared cores by directly introducing zinc oleate/S TBP solution (zinc oleate powder and S dissolved in TBP) into mixture without any purification steps and the thickness of ZnS shell was controlled by adjusting the adding amount of zinc oleate/S TBP solution. The optimal QDs with ten monolayers of ZnS shell exhibit pure blue light (∼455 nm) with narrow line width (full width half maximum, FWHM 17.2 nm) and high photoluminescent quantum yield (QY) (92%). Due to the thick ZnS shell, nonradiative recombination of the QD solids is suppressed efficiently.
研究领域:
纳米技术
·
材料科学
·
光电
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wei Cai,Jincheng Liu,Zewei Liao,Yijun Luo,Xiaoyan Xiang,Bingjie Li,Wenxin Yang,Yanxiong Fang
Overcoming limited charge separation and inefficient solar utilization remains critical for photocatalytic hydrogen evolution. This study addresses these challenges by constructing an organic-inorganic composite photocatalyst by integrating CdZnS nanoparticles with perylene-3,4,9,10-tetracarboxylic diimide (PDI) nanosheets via controlled assembly. Optimizing the PDI content yielded a remarkable hydrogen evolution rate of 7.09 mmol·g −1 ·h −1 under visible light irradiation, representing a 2.3-fold enhancement over pristine CdZnS. This superior photocatalytic performance originates from synergistic effects: exceptional light harvesting by PDI supramolecular structures, enhanced charge mobility via π-π conjugation pathways, and efficient charge separation with high redox potential preservation enabled by the S-scheme heterojunction mechanism. This work establishes a strategic paradigm for developing high-efficiency heterojunction photocatalysts through rational interface engineering.
研究领域:
光催化
·
材料科学
·
纳米技术
·
能量转换
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2015
·Vol. 10
·期 3
·630-636
·
IF 4.587
Lihua Yao,Ding Wei,Dongpeng Yan,Changwen Hu
Graphical Flower power : Hierarchical flower-like CdZnS@LDH microarchitectures were obtained by hydrothermal synthesis and exhibited enhanced visible-light-driven photocatalytic H 2 production compared with pristine CdZnS microspheres. The development of new semiconductor photocatalysts toward splitting water has supplied a promising way to obtain sustainable and clean hydrogen energy. Herein, CdZnS@layered double hydroxide (LDH) composites with a hierarchical flower-like microstructure have been fabricated with the aid of ZnCr–LDH nanosheets as templates. XRD, SEM and HRTEM show that the ZnCr–LDH nanosheets are uniformly dispersed within the composites. The surface of the hierarchical structures is rough and composed of numerous nanocrystals of CdZnS. The HRTEM images indicate that the surface of CdZnS nanocrystals is mainly composed of the (111) plane. Moreover, the visible-light-driven H 2 production performance of the CdZnS in the presence and absence of ZnCr–LDH nanosheets has been measured. The results show that ZnCr–LDH nanosheets play an important role in the hierarchical morphology and photocatalytic activity of the as-prepared samples. In the water-splitting process, the visible-light-driven H 2 -production rate of hierarchical flower-like CdZnS@LDH is 4.03 times and nearly 10 times higher than that of pristine CdZnS microsphere and pure commercial CdS, respectively. Therefore, this work not only achieves enhanced catalytic performance of the CdZnS by the introduction of ZnCr–LDH nanosheets, but also supplies an insight into the relationship between the hierarchical morphology and the semiconductor photocatalytic activity.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Xin Cheng,Mengyu Fu,Wangchao Chu,Shiqiang Chen,Guangzhou Liu
A nanostructured Fe 2 O 3 /CdZnS/ZnS composite film was constructed on EH40 steel using anodization, hydrothermal, and successive ionic layer absorption and reaction method. The film can inhibit the diffusion of dissolved oxygen to the substrate steel in aerobic seawater, and anodic dissolution of the substrate steel in D. vulgaris containing anaerobic seawater, respectively. The film can inactivate bacteria by producing active chlorine under light, which improves its anti-adhesion efficiency. The film prepared by 50 times of ZnS deposition reaches the highest anti-adhesion efficiency of 71.0 % and 63.3 % toward P. aeruginosa and D. vulgaris under dark, and 98.5 % and 96.0 % under light, respectively.
研究领域:
材料科学
·
腐蚀工程
·
环境科学
·
生物技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）