CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zheng Chen,Guowen Dong,Yibin Chen,Honghui Wang,Shurui Liu,Zhijie Chen,Chenghu Yang,Xu Shang,Randy Dahlgren
Semiconducting minerals are ubiquitous in soil and their association with microbes often affects the environment. In this study, the impacts of zinc sulfide (ZnS, used as a model compound for semiconducting sphalerite) on As/Fe mobility of flooded tailing soils under dark and intermittent illumination conditions were elucidated for the first time. Microbial reductive dissolution of As(V) and Fe(III) was more pronounced under intermittent illumination than under dark conditions. In ZnS-amended soils, release of As(III) and Fe(II) was 1.3 and 1.7 times higher, respectively, under intermittent illumination than the highest concentrations released from soils amended with acetate alone under dark conditions (12741.1 ± 714.3 μg/L and 37.9 ± 2.3 mg/L, respectively). However, under dark conditions in ZnS-amended soil, the release of As(III) and Fe(II) was 0.8 and 0.7 times that of the highest concentrations released from soils amended with acetate under dark conditions, respectively. Treatment with ZnS potentially decreased the abundance of several metal-reducing bacteria (e.g., Bacillus , Geobacter , Clostridium , and Desulfitobacterium ), which resulted in lower As/Fe reduction than for the acetate alone treatment under dark conditions. However, under intermittent illumination, the excited mineral photoholes were scavenged by humic/fulvic acids, and photoelectrons were synchronously separated and participated in the microbial electron chain. The fortification provided by the photoelectrons subsequently boosted As/Fe reduction, even though there was a lower abundance of metal-reducing bacteria. Hence, this study provides an in-depth understanding of the impacts of semiconducting minerals on the fates of metal pollutants, microbial diversity, and the bioavailability of dissolved organic matter in flooded soils.
研究领域:
环境科学
·
土壤学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Wei Bian,Fang Wang,Yanli Wei,Li Wang,Qiaoling Liu,Wenjuan Dong,Shaomin Shuang,Martin M.F. Choi
We report a turn-on phosphorescence probe for detection of histidine based on Co 2+ -adsorbed N -acetyl- l -cysteine (NAC) capped Mn: ZnS quantum dots (QDs) which is directly synthesized by the hydrothermal method. The phosphorescence of NAC-Mn: ZnS QDs is effectively quenched by Co 2+ attributing to the adsorption of Co 2+ onto the surface of QDs with a concomitant in suppressing the recombination process of hole and electron of QDs. The phosphorescence of Co 2+ -adsorbed NAC-Mn: ZnS QDs can be recovered by binding of Co 2+ with histidine. The quenching and regeneration of the phosphorescence of NAC-Mn: ZnS QDs have been studied in detail. The as-prepared QDs-based probe is applied to determine histidine with a linear range of 1.25–30 μM and a detection limit of 0.74 μM . The relative standard deviation for eleven repeat detections of 20 μM histidine is 0.65%. Co 2+ -adsorbed NAC-Mn: ZnS QDs show high sensitivity and good selectivity to histidine over other amino acids, metal ions and co-existing substances. The proposed QDs probe has been successfully applied to determination of histidine in human urine samples with good recoveries of 98.5–103%.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PLoS One
·
2024
·Vol. 19
·期 3
·e0295391
·
IF 2.9
Juan Xin,Ning Ren,Xueling Hu,Jin Yang
Although maize is sensitive to zinc (Zn) deficiencies, the responses of maize cultivars to the foliar application of Zn sulfate ( Zn SO 4 ) may vary significantly. Here, we quantified the responses of grain yields and nitrogen (N), phosphorus (P), and potassium (K) absorption to Zn SO 4 using 22 modern maize cultivars. The results revealed that 40.9% of the cultivars were not affected by foliar Zn SO 4 , whereas only 45.5% of the cultivars responded positively to Zn SO 4 , which was evidenced by increased grain numbers and shortened bald tip lengths. The impact of Zn fertilizer might be manifested in the dry biomass, from the 8-leaf stage (BBCH 18). For Zn-deficiency resistant cultivars, the foliar application of Zn SO 4 enhanced N accumulation by 44.1%, while it reduced P and K absorption by 13.6% and 23.7%, respectively. For Zn-deficiency sensitive maize cultivars, foliar applied Zn SO 4 improved the accumulation of N and K by 27.3% and 25.0%, respectively; however, it lowered their utilization efficiency. Hence, determining the optimized application of Zn fertilizer, while avoiding Zn toxicity, should not be based solely on the level of Zn deficiency in the soil, but also, take into consideration the sensitivity of some cultivars to Zn, Furthermore, the supplementation of Zn-deficiency sensitive maize cultivars with N and K is key to maximizing the benefits of Zn fertilization.
研究领域:
农学
·
植物营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhiwei Wang,Zhenya Zhang,Tian Yuan,Kazuya Shimizu,Ding Wang,Daijiang Luo,Daoxiang Wang,Juanjian Ru
Zinc sulfide (ZnS), one of the main ingredients of zinc ore and emerging materials, partly processes environmental risk. Deep eutectic solvents (DESs) are green solvents to efficiently separate metals with less emission. In this study, a novel route for direct electroseparation of Zn from ZnS in eco-friendly choline chloride-urea DES with the addition of malonic acid (MA) is studied for the first time. The role of MA and the reduction behavior of Zn(II) are systematically analyzed by cyclic voltammetry. The reduction of Zn(II) is quasi-reversible and follows one-step two-electron transfer process. Pure Zn with nanostructure is obtained with the current efficiency of 86.5 % and energy consumption of 2621.8 kW·h·t −1 at the optimized parameters of 10 mA·cm −2 , 353 K and 100 mM·L -1 ZnS. Mechanisms analyses indicate that in the presence of 60 mM·L -1 MA, besides [ZnCl − 3 ] - and [ZnCl − 5 ] 3- , some ZnS are dissolved to form stable [Zn(MA) 2- Cl − 2 ] 4- , [Zn(MA) 2- Cl - ] 3- and other MA based ligands, which causes a higher Zn ion solubility of 0.13 mol·L -1 and may promote the subsequent electroseparation of ZnS. Results from this study are expected to propose a simplified route to directly separate Zn from ZnS without oxidation pretreatment to achieve hazardous waste minimization.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 11
·1-9
·
IF 5.705
He Lifang,Bao Zhijun,Zhang Kui,Yang Danting,Sheng Bingbing,Huang Rui,Zhao Ting,Liang Xiaochen,Yang Xingjie,Yang Annan,Zhang Cheng,Cui Ping,Zapien Juan Antonio,Zhou Haibo
A ratiometric probe is described for the fluorometric determination of Cu(II) ions based on their quenching effect on the luminescence of dually-emitting quantum dots (QDs). ZnS QDs were doped with Mn(II) and subsequently modified with mercaptopropionic acid to give the QD probe which consists of a sole fluorophore but has two emission peaks (at 430 and 590 nm under 310 nm excitation, respectively). On addition of Cu(II) ions, the 590 nm band is quenched while the 430 nm band exhibits a little change. The changes in the intensity ratios of the yellow and the purple bands increases linearly in the 0 to 3.0 μM Cu(II) concentration range, and the detection limit reached 14 nM. The QD probe was validated and successfully applied to the determination of Cu(II) in spiked real water samples.
Mn-doped ZnS (ZnS:Mn(II)) quantum dots were synthesized with yellow fluorescence. After the modification of 3-mercaptopropionic acid (MPA), ZnS:Mn(II) was transferred to aqueous phase and became MPA modified Mn-doped ZnS (MPA- ZnS:Mn(II)). The fluorescence was changed to purple upon the addition of copper ions because the yellow band was largely quenched while the purple band only changed a little.
研究领域:
分析化学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Xue Xing,Weiwei Cao,Zhaoxin Wu,Xiaohong Bai,Jiarui Gao,Xiaozhen Liang,Bo Wang,Chao Wang,Dalian Shi,Linwei Lv,Yonglin Bai
A series of ZnS 0.75 O 0.25 :0.1%Ce 3+ , x %Tb 3+ phosphors were prepared by high temperature solid state reaction method. These phosphors exhibited two mixed phases consisting of hexagonal phase ZnS and hexagonal phase ZnO with the average particle size of 13.83 μm and emitted blue-green light. The luminescence mechanism consisted of Zn vacancy defects, the 5d 1 → 2 F 5/2 radiative transitions of Ce 3+ , the 5 D 4 → 7 F 5 and 5 D 4 → 7 F 6 radiative transition of Tb 3+ induced by the energy transfer of Ce 3+ → Tb 3+ . An equation for the variation of the fluorescence lifetime of ZnS 0.75 O 0.25 :0.1%Ce 3+ , x %Tb 3+ phosphors with concentration of Tb 3+ fraction was obtained by exponential fitting. The short fluorescence lifetime could be tuned within the range of 113 μs to 550 μs with the increase of Tb 3+ concentration, and the color was tunable from blue to blue-green, which is of important application in the field of high-energy particle detection.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
FlatChem
·
2022
·
IF 5.829
Liwei Xiong,Yukang Fu,Gang Wang,Ze Zhang,Fengshou Wu,Xiaogang Luo,Chunyan Shang
The development of low-cost and high active electrocatalysts for hydrogen evolution reaction (HER) is essential for the sustainable energy and environment. Here we report a hydrothermal method to prepare ZnS@MoS 2 nanosheets with hydrangea-like superstructure for enhanced HER. Benefiting from their abundant edge sites and facilitated charge transfer, the ZnS@MoS 2 exhibited excellent HER performance with low overpotential of 106 mV and small Tafel slope of 73 mV dec −1 . In addition, the chronoamperometry measurement results suggested the well-remained current density for 36 h without significant change, which indicated the excellent stability of ZnS@MoS 2 superstructure. This work not only provides an effective method for constructing hierarchical heterojunctions, but also gives us a multi-scale strategy for the regulation of metal-based nanomaterials’ structure in energy-related applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Xin Wang,Zhurong Liang,Xueqing Xu,Nan Wang,Jun Fang,Junxia Wang,Gang Xu
Highly Cu-rich copper indium sulfide (CuInS 2 , CIS) quantum dots were synthesized utilizing copper chloride (CuCl) and indium acetate (In(Ac) 3 ) as metal cation precursors, combined with n-dodecanethiol (DDT) as a coordinating sulfur source and solvent. With excess of In(Ac) 3 , i.e. with Cu/In ratios of 1/4, together with Zn 2+ ions post-treatment, a relatively high photoluminescence quantum yield (QY) of ∼73% with long average lifetime of ∼359 ns has been obtained, which is proposed to be attributed to the Cu-rich defect states in the CIS nanocrystals (NCs) nuclei. Meanwhile, the formation of In-rich CIS–ZnS alloy, i.e. Zn–Cu–In–S (ZCIS) with high density of Cu vacancies, combined with the surface passivation of ZnS overlay resulted in a high QY. Finally, the formation mechanism of the ZCIS/ZnS with Cu-rich nuclei has been proposed.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 3
·1089-1097
·
IF 4.831
Zhang Zhihong,Duan Fenghe,He Linghao,Peng Donglai,Yan Fufeng,Wang Minghua,Zong Wei,Jia Chunxiao
A nanocomposite consisting of zinc sulfide quantum dots and polyaniline (ZnSQD@PANI) was placed on a gold electrode along with antibody against clenbuterol to give an amperometric immunosensor for clenbuterol. Compared to the use of pristine PANI, the electrode modified with the ZnSQD@PANI nanocomposite adsorbs clenbuterol antibody much better and therefore exhibits higher sensitivity to clenbuterol. The biosensor, when operated at a working potential of 0.21 V (vs. Ag/AgCl), displays a detection limit as low as 5.5 pg⋅mL −1 and works over the 0.01 to 10 ng⋅mL −1 concentration range. Related species such as salbutamol and ractopamine, urine components such as urea and uric acid, and the ions Ca(II), Na(I), and K(I) do not interfere.
A nanocomposite of zinc sulfide quantum dots and polyaniline was synthesized and utilized as the electrode material for detecting clenbuterol hydrochloride (CH). Sensing includes immunoglobulin G anchoring, adsorption of clenbuterol antibody, and detection of clenbuterol.
研究领域:
分析化学
·
生物传感技术
·
纳米材料科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Lai Liu,Ye Tian,Jiangang Yu,Huizhen Yao
Copper zinc sulphide (CZS) due to high conductivity, fast photoresponse and good stability has attracted rising attention in optoelectronic field. Constructing heterojunctions with rational energy bands alignment can accelerate carrier separation to improve the performance of CZS-based photoelectric device. Herein, p-CZS/n-TiO 2 core-shell nanorods heterojunction film was successfully fabricated for the first time. CZS nanoparticles (NPs) were directly loaded on the surface of TiO 2 nanorods (NRs) through a simple chemical bath deposition. Photoelectrochemical (PEC) photodetector based on CZS/TiO 2 composite film was designed and interfacial charge kinetics has also been investigated. The CZS/TiO 2 PEC device exhibits fast response speed of 95/56 ms, high responsivity of 7.1 mA W -1 and detectivity of 5.6 × 10 12 Jones at a bias voltage of 1 V. The light on/off ratio of self-powered CZS/TiO 2 PEC device achieves 5.6 × 10 3 , nearly 30.4 times higher than bare CZS PEC device. Furthermore, the photodetection performance of the CZS/TiO 2 PEC device can be effectively regulated by light power density and environment conditions, promoting its adaptability in multifarious practical applications. The findings suggest that CZS/TiO 2 heterostructure film devices have great potential for high-performance and energy-efficient PEC photodetectors.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Youshuang Zhou,JianYun Ding,Zhaoyang Wei,Weiwei Lei,Jun You,Qunchao Zhang,Dean Shi
The catalytic effect of zinc sulfide (ZnS) on the transformation of polysulfides (Li 2 S 8 ) to lithium sulfide (Li 2 S) has been proven by the enhancement in the rate performance of lithium-sulfur (Li–S) batteries incorporating ZnS particles into the cathode. Accordingly, the shuttling effect of polysulfide should also be suppressed. However, the expected phenomenon is not found in the Li–S batteries with ZnS particles being added in the cathodes. In order to find the intrinsic mechanism of this phenomenon, detailed catalytic effects of ZnS particles on different polysulfide molecules are investigated. It is shown that ZnS can only enhance the reaction from Li 2 S 4 to Li 2 S and it has almost no catalytic effect on the reaction from Li 2 S 6 to Li 2 S 4 . This is why the shuttle effect of Li 2 S 6 cannot be effectively prohibited. This mechanism is further verified via combining ZnS particles with S–C@PVA yolk-shell particles containing sulfur (S) and carbon black (C) as the core and PVA as the shell. Although the reaction from Li 2 S 6 to Li 2 S 4 cannot be directly catalysed by ZnS particles, it can still be enhanced when ZnS particles are distributed within the S–C@PVA yolk-shell structure (S–C–ZnS@PVA) because the reaction speed from the Li 2 S 4 to Li 2 S is accelerated. The fast consumption of Li 2 S 4 will result in the enhancement of the reaction from Li 2 S 6 to Li 2 S 4 , which will largely reduce the diffusion of Li 2 S 6 out of the PVA shell. While if ZnS particles are located outside the S–C@PVA yolk-shell structure (S–C@PVA-ZnS), large amount of Li 2 S 6 can still diffuse out of the PVA shell and enter into the electrolyte since the transformation from is Li 2 S 6 to Li 2 S 4 relatively low. Both the rate performance and cycle stability of the batteries with S–C–ZnS@PVA cathodes are higher than those with S–C@PVA-ZnS ones. These results will give a guidance for the preparation of Li–S battery with high performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2014
·
IF 2.129
Yanhua Tong,Feng Cao,Jintian Yang,Minhong Xu,Chu Zheng,Xingyu Zhu,Di Chen,Min Zhang,Fan Huang,Jie Zhou,Lixiao Wang
Pristine and erbium-doped ZnS urchinlike hierarchical nanostructures were successfully synthesized via a chemical solution route. Morphologies of ZnS products have been controlled by adjusting sulfur source and the ratio of ethylene glycol to water by volume. The crystal structures, morphologies and chemical composition of samples were analyzed by X-ray powder diffraction, transmission electron microscopy and atomic emission spectrometry . The photoluminescence (PL) properties of samples were analyzed by spectrofluorometer. It was first found that its broad blue emission is originated not from zinc vacancies or just sulfur vacancies but from sulfur vacancies as well as extended sulfur-vacancy states. PL emission spectra of Er-doped ZnS urchinlike architectures indicated that Er doping can increase sulfur vacancies and extended sulfur-vacancy states. Photocatalytic experiments demonstrate that ZnS with 0.1 atomic% of Er 3+ performs the best photocatalytic activity . Photogenerated carriers transfer from outer surface to organic molecules and recombination inside ZnS were investigated by adsorbance and PL spectra, respectively. The results suggest that strong adsorptivity of Er-doped ZnS facilitates the transfer of photogenerated carriers from surface of ZnS to dye molecules; however, higher content of Er could in turn assists photogenerated electron–hole recombination inside ZnS.
研究领域:
材料科学
·
光学
·
纳米技术
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）