Desalination and Water Treatment
·
2024
·
IF 1
Jian-jun Lian,Meng Wu,Hong-yan Wu,Yan-ting Liu,Qing Xu,Man-jun Miao,Jian-hua Yang,Ke-ke Mao,Bo Chen,Feng Xue,Qiao-ping Kong,Ming-hao Shang,Xiu-ling Li
The significant increase in demand for molybdenum (Mo) resources has led to excessive molybdate (Mo(VI)) content in water, posing a challenge to the innovation of Mo(VI) removal technology in water bodies. Nanoscale iron sulfide (FeS) has an important effect on the environmental behavior of Mo(VI) in aquatic solutions. To address the issue of easy agglomeration and poor stability of FeS, zirconia sol-modified nanoscale iron sulfide (Zr-FeS) was synthesized, and the adsorption behavior of Zr-FeS on Mo(VI) from diverse aquatic solutions was also investigated in this study. The results showed that the removal rate of Mo(VI) was increased from 28.60% to 78.32% within pH value of 7.0 when Zr/Fe molar ratio was elevated from 0 to 0.5. Moreover, the Mo(VI) adsorption efficiency by Zr-FeS was closely related to pH values, and acid conditions were beneficial for Mo(VI) adsorption. The pseudo-second-order model demonstrated a better fit to the data compared to other models. The maximum adsorption capacity of Zr-FeS towards Mo(VI) value calculated by Langmuir isotherm model was 118.48 mg/g at 298 K. The thermodynamic analysis revealed that the adsorption process of Mo(VI) was endothermic, entropically favorable, and spontaneous in nature. Competing anions (e.g., PO 4 3– , HCO 3 – , and SO 4 2– ) partially inhibited the adsorption process of Mo(VI) by Zr-FeS. While the process was less affected by dissolved oxygen and aging. The results of Fourier-transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and density functional theory (DFT) calculations revealed that the main mechanisms for Mo(VI) removal were hydrogen bonding, electrostatic interaction and surface complexation. The high stability and fast adsorption rate indicated that Zr-FeS was a promising material to remove Mo(VI) from the aquatic solutions.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
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
Water Science and Engineering
·
2021
·
IF 0
Li Yin,Na Mi,You-ru Yao,Jing Li,Yong Zhang,Shao-gui Yang,Huan He,Xin Hu,Shi-yin Li,Li-xiao Ni
Ferrous sulfide (FeS) nanoparticles constitute an effective hexavalent chromium (Cr(VI)) treatment reagent. However, FeS nanoparticles aggregate easily, significantly limiting their engineering applicability. To overcome this shortcoming and further improve Cr(VI) removal efficiency, this study used tannic acid (TA) to modify FeS nanoparticles. The results demonstrated that TA-modified FeS nanoparticles, TA-nano-FeS, had a significantly reduced tendency to agglomerate, and maintained particle diameters of 10–100 nm, which were much shorter than diameters of FeS nanoparticles. In addition, TA-nano-FeS could combine the surface-active functional groups of TA. The maximum removal capacity of TA-nano-FeS was 381.04 mg/g, which was 2.92 and 1.83 times higher than those of TA and nano-FeS, respectively. Furthermore, the acidic condition was more beneficial for Cr(VI) removal, and the coexisting cations (Ca 2+ and Mg 2+ ) slightly decreased the removal efficiency of Cr(VI). Adsorption, reduction, and co-precipitation were the removal mechanisms, and the reaction products included FeCr 2 O 4 , Cr 2 O 3 , Fe 2 O 3 , Cr(OH) 3 , and S 8 . The results provided valuable information for the practical application of TA-nano-FeS in Cr(VI) removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 10
·26889-26900
·
IF 5.19
Jiang Chunlu,Zhou Shijia,Li Chang,Yue Fengdie,Zheng Liugen
A ZnCl 2 -modified biochar-supported nanoscale iron sulfide composite (FeS-ZnBC) was successfully prepared to address the easy oxidization of FeS and enhance Cr(VI) removal from water. The material was characterized by SEM, XRD, FTIR, and XPS. The effects of FeS:ZnBC mass ratio, FeS-ZnBC dosage, solution pH, initial Cr(VI) concentration, and reaction time on the adsorption performance were investigated. The results revealed that the optimum adsorption capacity of FeS-ZnBC (FeS:ZnBC = 1:2) for Cr(VI) was 264.03 mg/g at 298 K (pH = 2). A Box-Behnken design (BBD) was applied to optimize the input variables that affected the adsorption of Cr(VI) solution. The results revealed that the highest removal (99.52%) of Cr(VI) solution was achieved with a Cr(VI) initial concentration of 150.59 mg/L, FeS-ZnBC adsorbent dosage of 2 g/L, and solution pH of 2. The sorption kinetics could be interpreted using a pseudo-second-order kinetic model. The isotherms were simulated using the Redlich-Peterson isotherm model, indicating that Cr(VI) removal by the FeS-ZnBC composites was a hybrid chemical reaction-sorption process. The main mechanisms of Cr(VI) removal by FeS-ZnBC were adsorption, chemical reduction, and complexation. This study demonstrated that FeS-ZnBC has potential application prospects in Cr(VI) removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Tian Lu,Shi Xianrui,Shen Jinpeng,Li Zhaoqian,Pei Chonghua
In order to obtain the composite with uniform composition, excellent energy release and combustion performance, nano-sulfur/graphene oxide composite (SG) was prepared by in situ anchoring nano-sulfur on graphene oxide (GO), then mixed with KNO 3 to obtain nano-sulfur/GO/KNO 3 composite (SGK). The morphology, composition, thermal decomposition and combustion performance of the composites were characterized by SEM, TEM, XRD, IR, XPS, DSC, TG-DSC-FTIR and HSVR. The results show that nano-S was anchored in situ on GO nanosheets and KNO 3 was embedded in SG. The average diameter of nano-S is approximately 20 ~ 40 nm and the size of KNO 3 is approximately 2 ~ 5 μm. The BET surface area of SGK composite is about 14 m 2 g −1 . The exothermic peak temperature of SGK was lower about 15 °C than that of the physical mixture. The reaction activation energy of SGK is 170.9 kJ mol −1 and 173.7 kJ mol −1 by Kissinger and Ozawa methods, respectively, which is lower by about 15 kJ mol −1 than the physical mixture. Compared with standard black powder, the average combustion speed of SGK increased by 8.4 mm s.
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
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Jisheng Kou,Xiangyue Wei,Hui Wu,Wensheng Linghu,Guodong Sheng,Yixin Pan
The removal of U(VI) and Se(IV) in an aqueous solution was investigated by batch experiments and characterized by spectroscopy techniques such as FTIR, XRD, SEM, TEM, XPS, using FeS@h-BN nanocomposite which was synthesized by hexagonal BN (h-BN) as the stabilizer anchored onto FeS nanoparticles to address the agglomeration of the FeS. The effects of pH, adsorbent concentration, contact time, and initial concentration of U(VI) and Se(IV) on FeS@h-BN adsorption U(VI) and Se(IV) were studied. Results showed that FeS@h-BN nanocomposite showed an excellent decontamination performance due to the large surface area and surface potential. A pseudo-second-order kinetic model well reflected the kinetic adsorption of U(VI) and Se(IV) which indicated chemical interaction mainly contributed to U(VI) and Se(IV) adsorption on FeS@h-BN. The adsorption process of removing U(VI) fitted Freundlich and D-R models well which presented multilayer adsorption on the nanocomposite surface. The Langmuir model fitted well with sorption isotherm data of Se(IV) removal displaying a single monolayer reaction between Se(IV) and FeS@h-BN. The adsorption of U(VI) and Se(IV) was high pH-dependent since pH affected the FeS@h-BN nanocomposite surface potential and U(VI) and Se(IV) speciation. The maximum sorption capacity of U(VI) and Se(IV) reached 163.11 and 196.39 mg/g, respectively. These results reveal that FeS@h-BN nanocomposite could be promising for the effective decontamination of U(VI) and Se(IV).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Lipan Qin,Lanxiang Yang,Xiaochen Liu,Ke Li,Jian-Ping Cao,Jin Zhang
As a new material with excellent comprehensive properties, graphene is an excellent reinforcing agent for natural rubber (NR). However, how to improve the interface performance between graphene and NR, and at the same time be practical, is still a great challenge. In this study, nano-sulfur decorated graphene oxide materials (GO-S) were prepared by in-situ loading nano-sulfur on the surface of graphene oxide (GO). Nano-surface cross-link with NR in the vulcanization process, acts as a bridge to anchor GO and NR molecular chains and improve the interface bonding strength of GO and NR. The AFM results show that the interfacial phase thickness of NR-GO-S composites increased from 135 ± 18 nm to 245 ± 28 nm after in-situ loading modification. The tensile strength and tear property of NR-GO-S composites modified by sulfur loading reach 30.3 MPa and 40.0 kN⋅m −1 , respectively, which are 31.1 % and 12.8 % higher than those of NR-GO composite. Nano-sulfur form O–S and C–S covalent bonds with GO, and form more efficient covalent crosslinking networks with NR molecules in the vulcanization process, thus improving the interfacial compatibility between GO and NR and making the load transfer in rubber matrix more effective. This work provides a new idea and method to improve the interface property between rubber and inorganic nanomaterials.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Hai Wang,Renrong Liu,Qian Chen,Yiwei Mo,Yaohong Zhang
Novel materials that nano-FeS and starch (or chitosan) loaded on peanut shells biochar(Starch-FeS@PSB and Chitosan-FeS@PSB) were prepared and applied for removal of Pb(II) and nitrogen(NO 3 -N and NH 4 -N) in wastewater. It showed that Starch-FeS@PSB and Chitosan-FeS@PSB had excellent absorptive effects compared with PSB. The maximum adsorption capacity of Pb(II) by Starch-FeS@PSB and Chitosan-FeS@PSB reached 91.74 mg/g, 98.04 mg/g, respectively. Absorption of Pb(II) by Starch-FeS@PSB and Chitosan-FeS@PSB were controlled by monolayer chemisorption. Mechanism studies showed that complexation, electrostatic attraction, REDOX and physical absorption happened on the adsorbent surface. In addition, the maximum adsorption capacity of NO 3 -N and NH 4 -N by Starch-FeS@PSB and Chitosan-FeS@PSB reached 16.89 mg/g, 15.65 mg/g, and 18.45 mg/g, 18.28 mg/g, respectively. Absorption of N by Starch-FeS@PSB and Chitosan-FeS@PSB were controlled by multilayer chemisorption. Mechanism studies showed that complexation, electrostatic attraction and physical absorption happened on the adsorbent surface. Starch-FeS@PSB and Chitosan-FeS@PSB can be utilized in Pb(II) and N wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Chengyi Lu,Silun Luo,Yuhan Li,Juchen Li,Wentao Zhang,Jianlong Wang
Current problems of existing heavy metal-removing technologies, especially for nanomaterials-based ones, are typically single metal ion-specific, high-cost and collected difficult. Herein, facile modification of commercial sulfur creates a versatile adsorbent platform to address challenges. The versatile adsorbent can be easily prepared through solvothermal treatment of a saturated commercial sulfur solution, followed by water precipitation on a commercial foam that eliminates the need for separation. Interestingly, the solvothermal treatment endows the resulting nanosulfur with sulfate acid groups (hard Lewis base), sulfur anions (soft base), and sulfite groups (borderline base), promising the coordination of all types of heavy metal ions (Lewis acids). As such, this versatile adsorbent with well-distributed adsorption sites exhibits highly effective heavy metal adsorption capacity towards diverse heavy metal ions for both single-component and multi-component adsorption, including soft, hard, borderline Lewis metal ions, with ultra-high adsorption ability (e.g., 903.79 mg g −1 for Cu 2+ ). These findings highlighted the potential of this low-cost sulfur-based adsorbent to address the arising challenges in ensuring clean water.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Youru Yao,Na Mi,Cheng He,Yong Zhang,Li Yin,Jing Li,Wei Wang,Shaogui Yang,Huan He,Shiyin Li,Lixiao Ni
Nano ferrous sulfide (n-FeS) colloids show an excellent performance in the application of remediation in situ soil and groundwater. However, due to the interfacial effect and high reactivity of the nano sized FeS, n-FeS easy to agglomerate, which reduces their remediation efficiency. In this study, a novel composite colloid was synthesized using polyacrylic acid salt (PAA) and n-FeS. The PAA-n-FeS colloid was used to remove Cr(VI) in water remediation , and its removal mechanism and efficiency were explored. The results showed that the hydrodynamic diameter of PAA-n-FeS ranged from 65.04–90.09 nm and the zeta potential was from -27 to -54 mV at pH varying from 4.5–9.0. PAA was coated on the surface of n-FeS, which improved the dispersibility and stability of n-FeS by increasing the steric hindrance and electrostatic repulsion between n-FeS particles. Moreover, the Cr(VI) maximum removal amount PAA-n-FeS was 432.79 mg/g, which was significantly higher than that of n-FeS (218.29 mg/g) and PAA (12.32 mg/g). The mechanism of PAA-n-FeS removal of Cr(VI) was mainly derived from its own reducibility. The reaction products were mainly Cr(OH) 3 , Cr(III)-Fe(III), Cr 2 O 3 , and Cr 2 S 3 . This research not only finds a new stabilizer for preventing n-FeS agglomeration, but also provides a novel n-FeS composited colloid for promoting the practical application to Cr(VI) removal from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2019
·
IF 0
Jianhui Li,Wei Wei,Lingjie Meng
Lithium-sulfur (Li–S) batteries with high energy density are promising candidates to satisfy emerging energystorage demands. Nevertheless, the poor conductivity of sulfur and fast capacity decay of the sulfur-based electrodes restrict its practical applications. Here, we report a facile and simple titration method to synthesize nano-sulfur@liquid-phase exfoliated graphene (Nano-S@LEGr) composites by in situ growth of nanostructural sulfur on the LEGr surface. The as-prepared Nano-S@LEGr with tunable sulfur morphologies exhibited excellent electrochemical performance as the cathode material for Li–S batteries. In particular, the spherical Nano-S@LEGr composites with 68 wt% sulfur displayed a reversible capacity of 552.8 mAh g −1 after 100 cycles at a current density of 0.5C. Even at a high current density of 1C, a discharge capacity of 532.8 mAh g −1 could be delivered. Compared to rod-like Nano-S@LEGr and the graphene oxide derived cathode, the as-prepared spherical Nano-S@LEGr showed higher specific capacity, superior cycling stability and rate capability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
npj Clean Water
·
2025
·Vol. 8
·期 1
·1-9
·
IF 11.4
Peng Zhaozhou,Sun Jiangyuan,Li Panpan,Li Junzhang,Shen Chen,Tian Xia,Lian Jing,Khangale Phathutshedzo,Zhang Xiangjing,Matambo Tonderayi,Hildebrandt Diane,Liu Xinying,Liu Shouxin
High levels of nitrates and nitrites not only threaten aquatic ecosystems and drinking water safety but also impair the biodegradation efficiency of industrial wastewater. In this study, micro-nano-MoS 2 -1013 (0.04 g/L) enhanced denitrification by 56.9% and 29.6% in steel pickling and meat processing wastewaters, respectively, and improved chemical oxygen demand (COD) removal by 136.7% in refinery cooling wastewater under continuous-flow conditions using a 3.5 L upflow anaerobic sludge blanket (UASB) reactor. The catalytic effect of micro-nano-MoS 2 on denitrification was achieved by stimulating an increase in the abundance of denitrification genes and the transcript levels of narL (93.82 times), narG (16.34 times), and nirK (12.27 times) within the bacterial cells, which led to an increase in the expression levels of denitrifying enzymes. These findings have significant implications for the design and optimization of biodegradation processes and bio-denitrification systems, particularly for the treatment of high-concentration nitrate wastewater.
研究领域:
环境科学
·
微生物学
·
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）