JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yukun Huang,Yangbo Geng,Guihong Han,Yijun Cao,Weijun Peng,Xiaofeng Zhu,Ting-an Zhang,Zhihe Dou
A new route for selective recovery of zinc from hazardous zinc plant purification residue was proposed by alkaline leaching process. The thermodynamic analysis revealed that by controlling solution pH in the range from 14.30 to 16.78 at 25 °C, basic zinc sulfate can be converted to ZnO 2 2− instead of Zn(OH) 2 , while Cd will enter into alkaline leaching residue as a hydroxide. It is feasible to leach selectively Zn and to separate it with Cd by alkaline leaching, and the experimental results confirm that. Under the conditions of NaOH concentration of 3 mol/L, L/S of 20 ml/g, temperature of 40 °C, and time of 50 min, LR of Zn reached 96.14% while them of Pb and Cd were only 0.66% and 2.83% respectively. ZnO with hexagonal wurtzite structure and Cd(OH) 2 were the main phases of leaching residue. They crystallized and adhered to the surface of leaching residue particles, which result in the loose and random particle morphology. The findings confirm that alkaline leaching is efficient in separation of Zn and Cd in ZPPR. In addition, nano-ZnO with flowerlike was synthesized with the zinc-rich leaching solution by precipitation method and the its photocatalytic property was similar to that of nano-ZnO purchased.
研究领域:
冶金工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Kai Jia,Qiming Feng,Guofan Zhang,Wanying Ji,Wukai Zhang,Bingqian Yang
Smithsonite is a readily dissolvable carbonate mineral that is naturally hydrophilic, making recovery of this ore by flotation difficult. The flotation results showed that conditioning with only sodium sulfide (Na 2 S) did not successfully allow the smithsonite samples to float, whereas treatment with a combination of S(II), Pb(II) and xanthate (with Na 2 S as the sulfurizing reagent, lead ions (Pb(II)) as the activator, and xanthate as the collector) improved the flotation of smithsonite, achieving a mass recovery of 95.8%. A combination of analytical techniques, including X-ray diffraction (XRD), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), in conjunction with depth profiling , was used to investigate the chemical nature of the sulfur and lead species on the smithsonite surface. For S(II)-conditioned smithsonite, a layer of ZnS formed on the smithsonite (ZnCO 3 ) substrates; this newly formed ZnS coating was amorphous or poorly crystallized. For smithsonite samples conditioned with S(II) and Pb(II), the microstructures and the phase constituents, obtained by AFM and XRD analyses, confirmed the formation of the PbS species with a cubic galena structure on the surface. XPS depth profiling showed that the PbS layer was 18-nm thick, which corresponds to 30 PbS molecular layers . This study presents direct evidence that the coating of the activation product, PbS, on the smithsonite surface was similar to a relatively thick galena layer, which led to successful flotation.
研究领域:
矿物学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Shengliang Qi,Guanghui Zhang,Ting Xu,Xiaofei Lei,Kaixin Zhu,Chenghua Sun,Bo Yang,Xu Zong
Solid solution photocatalysts with well-tailored electronic structures are important candidates for high-performance photocatalytic hydrogen evolution reaction (HER). Although a few kinds of solid solution photocatalysts have been developed for photocatalytic HER, no phosphorous sulfide solid solutions have been used in this field. Herein, the preparation of a series of visible-light-responsive gallium phosphide–zinc sulfide (GaP–ZnS) solid solutions is presented capable of driving photocatalytic HER for the first time. It is found that the electronic structures of the GaP–ZnS solid solutions can be well regulated by tuning the compositions of the GaP and ZnS components. The optimum GaP–ZnS solid solution exhibits 4.3 times higher photocatalytic HER activity than GaP under visible light irradiation, which is ascribed to the contribution of the different elements that modulate the electronic structures. Graphical Phosphorus sulfide solid solution photocatalysts gallium phosphide–zinc sulfide (GaP–ZnS) are found to be capable of realizing visible-light-driven photocatalytic hydrogen evolution reaction for the first time. Moreover, the GaP–ZnS solid solutions exhibit higher photocatalytic activities than both GaP and ZnS.
研究领域:
材料化学
·
光催化
·
能源科学
·
半导体物理
·
无机功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2019
·Vol. 13
·期 4
·756-762
·
IF 7.804
Guoqiang Zhang,Xiang Ling,Guoshuai Liu,Yangsen Xu,Shuning Xiao,Qitao Zhang,Xun Yang,Chuntian Qiu,Hongwei Mi,Chenliang Su
Graphical Defective is effective : A defective Zn–Cd–S photocatalyst is prepared on a large scale and used to perform water splitting with a high apparent quantum yield (5.0 % at λ =420 nm) towards H 2 evolution in a system without a cocatalyst or sacrificial agent. Solar-driven H 2 evolution is an essential process for sustainable energy development. Currently, the greatest challenge is the development of efficient photocatalysts to drive this reaction, especially in pure water systems (without the use of a sacrificial agent). In this study, structural defects in Zn–Cd–S nanorod photocatalysts are found to increase charge separation efficiency significantly by sevenfold. Efficient H 2 evolution (352.7 μmol h −1 g −1 , 100 mg of catalyst) is achieved by using this defective Zn–Cd–S nanorod photocatalyst in the absence of sacrificial agents and precious metal cocatalysts under visible-light irradiation. Thus, this cocatalyst- and sacrificial-agent-free, visible-light-responsive system shows remarkable potential as a new artificial photosynthesis route for green H 2 production.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2023
·
IF 4.8
Jiahui Wu,Longhua Xu,Donghui Wang,Kai Xue,Xinzhang Shi,Lin Peng,Jiushuai Deng
Removing calcite is a tricky problem in smithsonite flotation because of its better floatability. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP), a scale inhibitor in water treatment industry, was chosen as a calcite depressant. This study validated the effectiveness of HEDP in separating smithsonite from calcite by flotation using sodium oleate (NaOL) as the collector, and obtained a 70% recovery difference in a single mineral flotation. Artificial mixed mineral flotation obtained a concentrate with a grade of 44% and a recovery of more than 80%. Zeta potential, Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) tests were conducted to obtained some crucial information on the adsorption of NaOL and HEDP, demonstrating that the adsorption of HEDP on calcite surfaces was stronger than smithsonite. The intense adsorption of HEDP on calcite surfaces was attributed to chelation with surface calcium sites. Quantum chemical calculations suggested that the selectivity of HEDP was closely related to the phosphate groups. HEDP was chemically adsorbed on calcite surface by complexing with calcium sites to form six-membered ring chelate. Partial oxygen atoms of phosphate groups dominated in the reaction with calcium sites, and the deprotonation of phosphate groups enhanced the reactivity.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Weichen Li,Gaolei Dong,Yan Liu,Bobo Yang,Shiliang Mei,Rongrong Hu,Yuxuan Zhu,Lu Zhang,Rizeng Tao,Ruiqian Guo,Jun Zou
Most anti-counterfeiting devices of luminescent materials are static and single-mode, which limits their security and versatility. A dynamic multimodal luminescent material based on the Br:ZnS glass ceramics was synthesised by high-temperature melting. The effects on the introduction of Br - ions were analysed. The Br:ZnS glass ceramics containing Br - ions exhibits significant fluorescence without the addition of rare-earth or metal ions doping, in contrast to previously reported luminescent materials. Moreover, the colour of the Br:ZnS glass ceramics changes from cyan to green as the temperature increases, indicating that the energy transfer involves the sulfur-vacancy-related emission centre and is influenced by the shifted donor-acceptor energy levels. Based on these findings, we explored the potential applications of the Br:ZnS glass ceramics in anti-counterfeiting and encryption and demonstrated that the dynamic multimodal luminescent characteristics of the material could enable novel and secure pathways for encoding and decoding information.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Shuang Liu,Qiaofeng Han,Xiaoheng Liu
Utilizing solar energy to produce hydrogen peroxide from oxygen and water offers an appealing and sustainable approach. In this work, Co-doped ZnIn 2 S 4 nanosheets were effectively synthesized through a chemical precipitation method, and the morphological structure, band structure and pathways for hydrogen peroxide production were investigated. The results indicate that Co doping significantly enhances the photocatalytic efficiency of ZnIn 2 S 4 in producing hydrogen peroxide. The sample with the 2 % doping concentration exhibited the highest rate, with a detected hydrogen peroxide concentration of 535.53 µM in the solution after 100 minutes of exposure to visible light, which is 4.29-fold higher than that of undoped ZnIn 2 S 4 . Further analysis revealed that the improved performance mainly originated from better spectral response, faster photogenerated carrier transport, and lower recombination frequency of photogenerated electron-hole pairs.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL LETTERS
·
2024
·
IF 1.6
Jing Yang,Zhe Lv,Bo Yang,Xiangdong Guo,Feiyong Qu,Yanping Miao,Dehui Li,Hongmei Gao,Wei Li
Photoluminescence enhancement provides an effective way to improve the performance of quantum dots. In this study, lead(II) determination was demonstrated based on phosphorescence enhancement using 1-thioglycerol-capped Mn-doped ZnS quantum dots. Under the optimized conditions, good linear correlations were obtained for Pb2+ from 10.00 to 5000 nM and 0.05000 to 100.0 mM with correlation coefficients of 0.9997 and 0.9979 and a detection limit of 2.56 nM. The method demonstrates good linearity and selectivity, suitable sensitivity, easy operation, and the determination of Pb2+ in Chinese herbal medicine.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Ning Li,Yong Ma,Jiafeng Ma,Qing Chang,Xiangqian Fan,Lei Liu,Chaorui Xue,Caihong Hao,Huayang Zhang,Shengliang Hu,Shaobin Wang
MoS 2 /ZnIn 2 S 4 flower-like heterostructures into porous carbon (PC@MoS 2 /ZIS) are embedded. This ternary heterostructure demonstrates enhanced light absorption across a broad spectral range from 200 to 2500 nm. It features both Type-II and S-scheme dual heterojunction interfaces, which facilitate the generation, separation, and transfer of photoinduced carriers. The PC enveloped by MoS 2 /ZIS composite microspheres serves as a photothermal source, providing additional energy to the carriers. This process accelerates charge separation and migration, enhancing photothermal-assisted photocatalytic H 2 evolution. The optimal H 2 evolution rate for PC@MoS 2 /ZIS reaches an impressive 18.79 mmol g −1 h −1 , with an apparent quantum efficiency of 14.1% at 400 nm. This work presents a promising approach for effectively integrating multicomponent heterostructures with photothermal effects, offering innovative strategies for efficient solar energy utilization and conversion.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2021
·Vol. 11
·期 8
·894
·
IF 2.881
Weiping Du,Yingying Ding,Yang Zhang,Huifang Chen
The surface modified hydrophilic zinc sulfide nano powder was prepared by hydrothermal method, and the corresponding zinc sulfide/polyurethane organic-inorganic composite transparent coating via in-situ polymerization. The structure of ZnS Nanoparticles and organic-inorganic composite coating were characterized by Infrared Spectroscopy, X-Ray Diffraction, Laser Particle Size Analyzer and Scanning Electron Microscopy. The optical properties were measured by Ultraviolet-Visible spectrophotometer and ellipsometry. The results show that the monodisperse hydrophilic nano zinc sulfide powder with a particle size of about 70 nm can be obtained by thioglycolic acid (TGA) modification, which has good compatibility with waterborne polyurethane. Nano zinc sulfide increased the refractive index of the coating significantly and the refractive index of the coatings could be controlled in the region of 1.46–1.71 organic-inorganic composite coating by adding ZnS. When the amount of nano ZnS added was 30%, the refractive index of the hybrid coating can reach 1.71, and the transmittance was more than 90%. The cured coatings were smooth and no agglomeration between nano ZnS particles could be found. After application on the surfaces of resin lens, the coatings presented better impact resistance, which indicated that the coating has application prospects in the field of fine processing of lens’ surfaces.Keywords:nano zinc sulfide;polyurethane;in-situ polymerization;coating;resin lens
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Cheng Zhang,Kui Zhang,Tingting Zhao,Bianhua Liu,Zhenyang Wang,Zhongping Zhang
Pesticides abuse has drawn considerable attention in agriculture, environment and food safety in recent years. How to selective and on-site detection of pesticide residues with rapid operation and low cost is still a hot topic. In this work, we report a novel method for the detection of pesticide thiram using phosphorescent Mn-doped ZnS quantum dots (ZnS:Mn 2+ QDs) combined by an affinity reaction between thiram and Ag + ions. On the one hand, the phosphorescence of as-prepared ZnS:Mn 2+ QDs at 590 nm can be effectively quenched by Ag + ions due to the direct cation-exchange reaction at the surface of QDs. On the other hand, the presence of thiram can inhibit phosphorescence quenching through the formation of stable Ag-thiram complex. This inhibition resulted in a linear recovery in emission intensity with increasing the amount of thiram, which enables thiram residues to be identified under the UV light illumination. In buffer condition, thiram could be detected within the concentration range of 50 nM–2.5 μM with a detection limit of 25 nM. Moreover, the proposed method has been successfully applied to thiram residues identification at fresh fruit peels. The investigation provides a profile for instant and visual detection of surface residues using doped quantum dots.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
NATURE MATERIALS
·
2023
·Vol. 22
·期 8
·958-963
·
IF 41.2
Li Mingqiang,Shen Yidi,Luo Kun,An Qi,Gao Peng,Xiao Penghao,Zou Yu
Dislocation motion, an important mechanism underlying crystal plasticity, is critical for the hardening, processing and application of a wide range of structural and functional materials. For decades, the movement of dislocations has been widely observed in crystalline solids under mechanical loading. However, the goal of manipulating dislocation motion via a non-mechanical field alone remains elusive. Here we present real-time observations of dislocation motion controlled solely by using an external electric field in single-crystalline zinc sulfide—the dislocations can move back and forth depending on the direction of the electric field. We reveal the non-stoichiometric nature of dislocation cores and determine their charge characteristics. Both negatively and positively charged dislocations are directly resolved, and their glide barriers decrease under an electric field, explaining the experimental observations. This study provides direct evidence of dislocation dynamics controlled by a non-mechanical stimulus and opens up the possibility of modulating dislocation-related properties.
研究领域:
材料科学
·
固体物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）