JOURNAL OF MATERIALS CHEMISTRY
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2012
·Vol. 22
·期 18
·8759-8763
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IF 5.968
Yuhan Lin,Fang Zhang,Daocheng Pan,Hexing Li,Yunfeng Lu
TiO2/(ZnS)x(CuInS2)1−x nanocomposites were prepared from oleic acid-capped TiO2 nanocrystals and alloyed (ZnS)x(CuInS2)1−x nanocrystals. Element mapping and transmission electron microscopy (TEM) results suggested that the nanocomposites exhibit homogeneous composition with uniform mesoporous structure. High photocatalytic activities driven by simulated solar light were achieved owning to their high surface area and efficient electron transfer from (ZnS)x(CuInS2)1−x to TiO2. This work enables the synthesis of a large variety of photocatalysts from nanocrystal building blocks for various applications beyond photodegradation of organic pollutants.
研究领域:
材料科学
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环境化学
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纳米科技
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光催化
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半导体材料
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INORGANIC CHEMISTRY
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2025
·
IF 4.7
Fan Shi,Shuangyi Yuan,Ranran Hu,Hang Xiao,Shaolu Zhang,Chenyang Wang,Xiangtong Zhang,Huaibin Shen
Indium phosphide (InP)-based quantum dots (QDs) have emerged as a promising alternative to cadmium-containing QDs for photonic applications. Nonetheless, the evolution of the synthesis chemistry for InP-based QDs poses a significant challenge, particularly with regard to morphological control. This study demonstrates efficient morphological control of square and spherical green-emissive InP/ZnSe/ZnS QDs. The formation of square-shaped QDs is attributed to the fluoride-induced suppression of {111} facet growth, which promotes shell growth along the {100} facets. Conversely, spherical QDs emerge owing to weak suppression of {111} facet growth. The fluoride is derived from the reaction between ZnF2 powder and oleic acid. It has been demonstrated that coordination between TOP and oleic acid effectively impedes this reaction. Beyond photoluminescence, the QDs exhibit strong and narrow radioluminescence (RL) at 565 nm with a full width at half maximum (FWHM) of 42 nm under X-ray excitation with a light yield of 4.2 × 103 photons/MeV. A QD X-ray imaging film was demonstrated to successfully visualize the internal components of opaque objects. This work demonstrates a ligand-mediated strategy for the morphological control of InP-based QDs and highlights their potential for X-ray imaging.
研究领域:
纳米材料
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量子点
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X射线成像
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合成化学
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光电子学
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jian Zhang,Yule Zhang,Songrui We,Han Zhang,Lingfeng Gao,Hao Wan,Chunxian Guo
Emerging photoelectrochemical (PEC)-type photodetectors (PDs) have attracted increasing attention due to their low-cost manufacturing and liquid-phase working environment. However, the current reported PEC-PDs still suffer from relatively poor stability during operation in harsh and complex liquid environments, which hinders their practical applications. Here, a custom PD based on the CdSe 0.9 Te 0.1 /ZnS core-shell quantum dots (CSQDs) was constructed with optimized photocurrent density ( P ph ) of 7.36 μA∙cm −2 , photo-responsivity ( R ph ) of 701 μA∙W −1 and detectivity of 1.93 × 10 8 Jones in basic electrolyte. Even in a highly corrosive acidic electrolyte, excellent photo-response performance was observed with P ph of 1.48 μA∙cm −2 and R ph of 6.88 μA∙W −1 . Strikingly, ultra-high photocurrent retention efficiency (PRE) values of 98.1 % and 74 % can be retained for measuring in 1.0 M KOH and HCl after sample stored for one month, respectively. Density functional theory calculations confirmed that the adsorption energy of CdSeTe/ZnS-OH/-H CSQDs are both weaker than CdSeTe-OH/-H QDs. This work presents a pH-universal photoactive material for PEC-PDs, and achieves one of the highest PRE values reported in PEC systems, demonstrating the enormous potential of CdSe 0.9 Te 0.1 /ZnS core/shell structure in enhancing device stability and overcoming the acid-hydrolysis problem of Cd-based materials.
研究领域:
光电化学
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纳米材料
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光电子器件
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量子点
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传感器
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JOURNAL OF MEMBRANE SCIENCE
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2023
·
IF 9.5
Yahui He,Yao Zhu,Siyuan Wang,Haixiang Wang,Aijin Ma,Jing Wang,Baoguo Sun
This study used the phase inversion method to prepare a novel ZnCdSe/ZnS quantum dot molecularly imprinted (ZnCdSe/ZnS@MIPs) polyethersulfone (PES) fluorescent composite (ZnCdSe/ZnS@MIPs@PES) membrane for the rapid detection of pyrraline (PRL). This membrane addressed the challenges presented by quantum dots molecularly imprinted polymers (QDs@MIPs) particles in liquids and required no pre-treatments during the analysis for accurate content determination at a low LOD. When the samples passed through the membrane via an automatic circulating filtration device, the PRL was specifically adsorbed due to the imprinted recognition sites on the ZnCdSe/ZnS@MIPs particles, causing membrane fluorescence quenching. Matrix-interfering components were removed for the porous structure of the membrane. Compared with the ZnCdSe/ZnS@MIPs solution method, the detection limit and accuracy of the ZnCdSe/ZnS@MIPs@PES membrane technique was significantly more successful in enhancing enrichment and purification functionality, reducing the analysis duration from 3 to 4 d to 45 min, while the operational procedure was decreased from 16 steps to two. When applied for PRL analysis in milk with 15% PES content and 6 mg ZnCdSe/ZnS@MIPs addition, the PRL was quantitatively detected in a broad concentration range (30–1000 μg/L) with R 2 =0.99. The LOD of ZnCdSe/ZnS@MIPs@PES membrane decreased at a higher sample injection volume, reaching a minimum of 18.1476 μg/L at 14 mL injection.
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Lubricants
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2023
·Vol. 11
·期 7
·280
·
IF 3.5
Yiping Sun,Cheng Jiang,Qin Zhao,Xiaobo Wang,Wenjing Lou
The content of Cu2+in lubricants is an essential indicator for determining the quality of the lubricant and predicting mechanical failure. Finding an effective and sensitive method for detecting Cu2+in lubricants is of great importance in oil monitoring. In this work, AgInS2(AIS) and AgInS2-ZnS (ZAIS) nanoparticles (NPs) were synthesized by a simple one-step approach via in-situ surface modification by oleylamine. The as-synthesized AIS and ZAIS NPs exhibit good dispersion stability in various apolar media. The photoluminescence (PL) of AIS and ZAIS NPs as lubricating additives could reflect and monitor the lubrication state of steel-copper pairs due to the quenching effect of Cu2+from the friction process. With an optimum concentration of 0.5 wt% in paraffin oil, the friction coefficient of the AIS and ZAIS NPs at 100 N was decreased by 56.8 and 52.1% for steel-steel contacts, respectively. ZAIS was observed to be more effective than AIS in improving anti-wear (AW) and extreme pressure (EP) properties, with a load-bearing capacity of up to 1100 N. Characterization of the wear tracks by SEM and XPS indicates that a tribofilm composed of metal sulfides and oxides was formed during the lubricating process. This work not only reveals AIS and ZAIS NPs as a new class of promising candidates for lubricating additives but also unveils their potential for monitoring lubricant conditions and exploring lubricant service life.Keywords:AgInS2;AgInS2-ZnS;lubricant additive;friction and wear;photoluminescence
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International Journal of Green Energy
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2023
·
IF 3.3
Zefeng Zhang,Xianli Fang,Haiyan Qian
ZnS is a well-known photocatalyst in the field of water treatment, but its applicability is limited due to poor visible light sensitivity, low photon efficiency, and photo corrosion. In this study, a new type of ZnS/Ti3C2Tx composite photocatalyst was developed by growing ZnS microspheres on a single-layer Ti3C2Tx, which is based on the sheet-like structure and metal-like characteristics of Ti3C2Tx. The resulting Ti3C2Tx-based composite photocatalyst with ZT0.35% showed superior catalytic activity in the degradation of methyl orange under natural light. The catalytic rate constant was 3.51 times higher than that of ZnS alone, reaching a maximum of 0.0244 min−1. Within 120 minutes, the degradation rate of methyl orange was 96.3%, while that of ZnS was only 41.6%. Photoluminescence and free radical scavenging experiments revealed that the composite structure is responsible for the improved photocatalytic activity and that the ZnS/Ti3C2Tx structure is favorable for the separation and transport of photogenerated carriers. The developed ZnS/Ti3C2Tx composite has great potential as a photocatalyst for the degradation of organic contaminants.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Ning Liu,Rumin Li,Jiahui Zhu,Qi Liu,Rongrong Chen,Jing Yu,Ying Li,Hongsen Zhang,Jun Wang
In the present research, ZnS/WO 3 composites were prepared by coprecipitation method to construct the Z-scheme heterojunction photocatalyst with high efficiency electron separation for the photocatalytic reduction of U(VI). Compared with WO 3 and ZnS, the visible light absorption, photoreduction ability and photocatalytic activity of ZnS/WO 3 composites were improved. The ZnS/WO 3 composites show higher photoreduction U(VI) performance under visible light irradiation with the maximum extraction capacity of U(VI) at 1.52 g g −1 . The ZnS/WO 3 composites exhibit high uranium reduction ability under natural light with removal efficiency reaching 93.4 %. In-situ monitoring experiments and DFT calculations were designed to explore the mechanism and pathway of photoelectron transfer in the reduction process from U(VI) to U(IV). The results show that ZnS/WO 3 has an internal electric field to form a Z-scheme electron transfer , and uranium reduction is a dual-electron transfer pathway. In addition, the band gap regulation mechanism of binary composite semiconductor materials is deeply discussed.
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ANALYTICAL CHEMISTRY
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2022
·
IF 8.008
Shuangtian Dong,Dongyang Wang,Xuwen Gao,Li Fu,Jingna Jia,Yuqi Xu,Bin Zhang,Guizheng Zou
All commercial chemiluminescence (CL) assays are conducted with either glow or flash CL of eye-visible waveband from chemical luminophores. Herein, glow and flash, as well as waveband adjustable CL from the same nanoparticle luminophore of thiol-capped CuInS2@ZnS nanocrystals (CIS@ZnS-Thiol), are proposed via extensively exploiting the differed redox nature of CL triggering reagents. Taking thiosalicylic acid (TSA) as the model thiol-capping agent, the electron-injection-initiated charge transfer between CIS@ZnS-TSA and reductant can bring out efficient glow CL while the hole-injection-initiated charge transfer between CIS@ZnS-TSA and oxidant can give off obvious flash CL under optimum conditions. The maximum emission wavelength for CL of CIS@ZnS-TSA is adjustable from 730 nm to 823 nm via employing different triggering agents. Promisingly, the coexistent reductant of N2H4·H2O and oxidant of H2O2 can be employed as dual triggering reagents to trigger eye-visible and highly efficient flash CL from CIS@ZnS-TSA. The maximum emission intensity for flash CL of CIS@ZnS-TSA/N2H4–H2O2 is 101-fold greater than the glow CL of CIS@ZnS-TSA/N2H4 and 22-fold greater than the flash CL of CIS@ZnS-TSA/H2O2, respectively. The flash CL from CIS@ZnS-TSA/N2H4–H2O2 is qualified for highly sensitive and selective CL immunoassay in a commercialized typical procedure with the entire operating process manually terminated within 35 min.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
·
IF 4.3
Chenglin Zhang,Junxian Qin,Changqing Yang,Yun Hu
The conversion of the volatile organic pollutant to industrially valuable chemicals using photocatalysis is a promising endeavor. Herein, ZnS/CdIn 2 S 4 heterojunction with rich sulfur vacancy was constructed via a simple one-pot method for the selective photocatalytic oxidation of toluene to benzaldehyde . ZnS/CdIn 2 S 4 has a suitable band gap and valence band position, thus possessing a mild oxidation ability to generate benzaldehyde while avoiding excessive oxidation. In addition, the presence of tightly bound contact interfaces and sulfur vacancy in ZnS/CdIn 2 S 4 heterojunction facilitates the rapid separation of photogenerated electron-hole. These characteristics of the heterojunction synergistically promoted the selective photocatalytic oxidation of toluene, resulting in ZnS/CdIn 2 S 4 exhibiting the highest benzaldehyde production rate (1025 μmol g −1 h −1 ) and the highest conversion rate (13.7%), which were 93.1 and 56.9 times higher than those of ZnS and CdIn 2 S 4 , respectively. Furthermore, a possible response mechanism has been suggested based on a series of experiments. This study provides new insights into the combination of volatile organic pollutant degradation and high-value chemicals production.
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2021
·
IF 2.262
Lili Yan,Siyu Jiang,Pinhua Rao,Guanghui Li,Zongdi Hao,Lei He,Shanliang Liu,Guofeng Shang
Rice hull biochar modified by ZnS nanocrystals (RBZ) was developed as an efficient absorbent for the removal of Cu(II) in aqueous solution. Response surface methodology (RSM) was applied for modeling and optimizing the performance of RBZ. The maximum adsorption capacity of RBZ toward Cu(II) through the Langmuir model fitting was 248.98 mg g−1, which was four times larger than that of rice hull biochar (RB). The adsorption kinetics of Cu(II) and XPS analysis revealed that the chemisorption process played the leading role when using RBZ. Through competition ions study, Pb(II), Cd(II), or Ca(II) can slightly reduce the adsorption of Cu(II). According to the Box Behnken design method, the analysis of variance results showed that the pH and adsorbent dosage had significant effects on the predicted responses of adsorption capacity and removal efficiency. When using the optimum conditions, pH 6, temperature 27 °C, and dosage 0.20 mg mL−1 for removing Cu(II) in solution, the maximum adsorption capacity and relatively higher removal efficiency could be obtained through the 3D response surface plots. The results demonstrated that RSM is feasible to achieve optimal conditions for adsorption capacity and removal efficiency simultaneously toward heavy metals from aqueous medium, and the interaction between them when using the biochar/ZnS composite.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Long Wu,Shuhong Zhou,Yonghuan Yun,Lin Zhu,Bei Li,Weimin Zhang
Based on the exchange of the DNA duplex-quadruplex, a multifunctional Pb(II) ion probe was fabricated, in which Pb(II) ion-driven DNA duplexes act as a bridge to link CdSe/ZnS-luminol and Fe 3 O 4 nanoparticles . As Pb(II) ion owns a strong binding capacity for G-quadruplex (G4), it can unwind the DNA duplex and release its complementary strand. In this strategy, three detection modes, chemiluminescence (CL), fluorescence (FL) assay and colorimetric assay (CA), can be realized via DNA duplex bridged CdSe/ZnS and Fe 3 O 4 nanocomposites . Amongst, FL assay shows the best detection performance, and it exhibits a linear range of 10 nM to 10 µM, as well as the limit of detection (LOD) with 1.63 nM (n = 3, ± 3.5%). In the selective analysis, Pb(II) ion can be specifically detected in the nine different interfering metal ions . Besides, the magnetic probe requires only one “mixing and separation” operation and greatly improves the detection efficiency. The three assays can be combined as one method to achieve a simple and rapid feature. Such a three-in-one analytical platform, therefore, can serve as a powerful tool for selective, accurate and sensitive detection of Pb(II) ion.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2018
·
IF 3.997
Miao Zhao,Ying Chen,Rongcheng Han,Dan Luo,Libo Du,Qiang Zheng,Lijun Wang,Yuankai Hong,Yang Liu,Yinlin Sha
We here report a facile synthesis of chitosan shelled quantum dot (QD/fGC) that holds essential properties requisite for biological applications, such as excellent water solubility, super colloidal stability, and low nonspecific adsorption as well as ease of functionalization. In this method, the amphiphilic glycol chitosan fragment (MW 1.0–1.7 kDa) was assembled on the top of CdSeS/ZnS nanocrystal through hydrophobic interaction in aqueous solution, without displacing the native coordinating ligands, which result in a higher quantum yield of about 0.26, 46% of the uncoated CdSeS/ZnS QDs in chloroform (0.57). In addition, the prepared QD/fGC composes an individual semiconductor core and presents an extremely small size of about 6.03 ± 1.50 nm (n = 399) in diameter. By conjugation with bioactive amines via 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC)-based hydroxyl activation approach, the functionalized QD/fGC presented excellent recognition of specific cells in fluorescent imaging. Our work provides a new general method of chitosan modification of hydrophobic nanoparticles for biomedical applications.
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