Water
·
2023
·Vol. 15
·期 20
·3667
·
IF 3.4
Junqing Xu,Meitian Pan,Cong Zou,Xueqiong Huang,Takeshi Hagio,Ryoichi Ichino,Long Kong,Liang Li
Heavy metal pollution poses an environmental risk, and its efficient removal and facile separation from water remains a challenge. Magnetic iron oxide, an eco-friendly, relatively stable, and easy-separation material, has been regarded as one of the most applicable adsorbents for water treatment. However, the limited adsorption capacity has restricted its applications. Herein, sulfur-doped magnetic Fe3O4(Sx–Fe3O4) adsorbent was fabricated using a calcination method for the efficient removal of Pb(II) from water. In contrast to undoped Fe3O4, the introduction of doped sulfur greatly enhanced the adsorption performance of S–Fe3O4over four times, with a maximum capacity of 333.33 mg g−1, which was synthesized at 300 °C with a raw molar ratio of S–Fe of 5. Based on the structure and morphology analysis, it was demonstrated that sulfur was successfully doped into the Fe3O4structures, which resulted in Fe3O4with active sulfur sites accordingly contributing to the adsorption enhancement through the combination of strong soft–soft interactions between soft base sulfur and soft acid Pb(II) along with surface adsorption. Sx–Fe3O4could maintain the adsorption performance in the presence of competing ions. Furthermore, although the sulfur doping process exhibited slight side effects on the magnetic property, magnetic Sx–Fe3O4maintained the high separation potential. This study presented a promising strategy to enhance the adsorption performance of Fe3O4through sulfur doping for Pb(II) removal from water.Keywords:adsorption;Pb;sulfur-doped Fe3O4;water treatment
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tengfei Zhang,Dan Xu,Ping Liu,Long Chen,Wen Guo,Tiantian Gu,Feng Yu,Yanyan Liu,Gang Wang
The development of economical, efficient, and durable bifunctional catalyst for overall water splitting is an attractive and challenging task. Herein, a novel defect-rich 2D/2D heterostructure is constructed by vertically growing S-doped NiMoO 4 (NiMoO 4 -S) nanosheets on nickel sulfide (Ni 3 S 2 ) nanosheet arrays supported on nickel foam (NF) using a two-step hydrothermal method. Benefiting from the hierarchical sheet-on-sheet heterogeneous nanostructure and abundant oxygen vacancies for more active sites, efficient electronic/mass transfer, and fast gas release, the synthesized NiMoO 4 -S/Ni 3 S 2 /NF electrode exhibits excellent electrocatalytic performance for HER (η 10 mA cm −2 = 107 mV) and OER (η 50 mA cm −2 = 285 mV). The alkaline water electrolyzer with NiMoO 4 -S/Ni 3 S 2 /NF as the positive and negative electrodes can provide a current density of 10 mA cm −2 with the potential of 1.52 V, which is below that of the commercial Pt||RuO 2 /NF system or many other reported systems. More importantly, the alkaline water electrolyzer offers a current density of 100 mA cm −2 at 1.85 V with outstanding durability of over 50 h. This research points to a promising route in designing transition metal-based bifunctional electrocatalysts for large-scale energy conversion applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yujie Xiang,Zhengting Wang,Ying Zhang,Rui Gao,Yonggui Tao,Chisheng Deng,Shukang Deng,Jinsong Wang,Kaiyuan Shen
The environmentally friendly and sustainable characteristics of hydrogen generation through water electrolysis have drawn considerable interest. However, the inherently retarded reaction dynamics of the oxygen evolution reaction (OER) limit its efficiency. Consequently, advancing high-performance and cost-effective OER electrocatalysts significantly strengthen the water electrolysis’ performance. A composite nanostructured catalyst is successfully developed by integrating S-doped NiMoO 4 with NiFe-layered double hydroxides (LDH). Characterization results indicate that the NiMoO 4 -decorated NiFe-LDH increases catalytic efficiency by providing additional active sites, while the introduced S further enhances electrical conductivity. Electrochemical tests reveal that the OER capability of S-NiMoO 4 @NiFe-LDH under alkaline conditions is exceptional, achieving a negligible overpotential of 256 mV at 50 mA cm −2 and a minimal Tafel slope of 27.8 mV dec −1 , along with outstanding durability at 10 mA cm −2 (200 h). Furthermore, electrochemical probe experiments and mechanistic analyses reveal the possible potential reaction route of the catalyst during the OER, playing a crucial role in clarifying how the adsorbate evolution mechanism (AEM) and the lattice oxygen mechanism (LOM) synergistically enhance catalytic performance. This study affords a compelling strategy for establishing stable and efficient catalysts for electrochemical water oxidation.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 40
·6010-6017
·
IF 3.382
Shuai Fang,Hongan Ma,Zhanke Wang,Zhiqiang Yang,Zheng-hao Cai,Luyao Ding,Xinyuan Miao,Liangchao Chen,XiaoPeng Jia
FeS is the main sulfur-containing compound in natural diamond inclusions. The research on FeS-doped diamond crystals plays an extremely important role in exploring the growth environment of natural diamond and the chemical composition of the earth. In our work, the characteristics of FeS doped diamond crystals were studied by using a China-type large volume cubic high-pressure apparatus with an iron–nickel alloy as a catalyst at 6.0 GPa and 1300–1350 °C. The crystals were characterized by OM, SEM, XPS, FTIR and Raman. Scanning electron microscopy of the crystal shows that the {100} plane of the crystal is rougher than {111}, which is related to the number of dangling bonds on different crystal faces of the crystal. The residue on the surface of the crystal was detected by mapping, and the test result showed that it was a sulfur iron and a sulfur nickel compound. FeS will decompose in the synthesis system, and the decomposition products are Fe and S2.The XPS spectrum of the crystal shows that S was successfully incorporated into the diamond lattice by forming C–S–O and C–S–SO2–C bonds, and the peak intensity was strong. The infrared spectrum shows that the N content in the crystal gradually increases as the doping ratio increases. Raman spectroscopy analysis shows that the S-doped Ib-type diamond single crystal has a high-quality sp3 structure, and the full width at half maximum (FWHM) of the crystal gradually broadens as the doping ratio increases.
研究领域:
地球化学
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材料科学
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高压合成
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Lin Wu,Jie Feng,Zhijuan Zou,Kunpeng Song,Chunmei Zeng
It’s still a challenge to design reasonably efficient catalyst based on non-noble metal for water decomposition. Herein, we prepared a self-supported S-NiFe/NFF catalyst by sulfurated NiFe-based metal–organic framework on the NiFe foam (NFF) through a simple solvothermal method. Benefiting from the direct contact with the conductive NiFe foam matrix, the electronic environment of the active site regulated by heteroatomic oxygen and sulfur, and the positive synergistic effect between nickel and iron, the catalyst S-NiFe/NFF shows outstanding electrocatalytic activity for oxygen evolution (OER) and hydrogen evolution (HER) reactions with a low overpotential of 174 mV and 150 mV at a current density of 10 mA cm −2 in alkaline electrolyte, respectively; and the S-NiFe/NFF‖S-NiFe/NFF cell only needs 1.50 V battery voltage to reach the current density of 10 mA cm −2 . This work reports a highly efficient water decomposition catalyst, which indicates that non-noble metal-based electrocatalysts have great potential applications in the water electrolysis field, and provides a basis for rational design and synthesis of MOF-derived catalysts with unique structures.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Xiaoqin Sun,Tianyu Wang,Xiaoxiang Xu
Heterojunction photocatalysts possess high efficiency in photogenerated electron-hole separation, which give significant advantages in the field of solar hydrogen production . Herein, a novel ZnIn 2 S 4 @S doped g-C 3 N 4 (ZIS@SCN) heterojunction with mesoporous structure was prepared for photocatalytic water splitting under visible light . Characterization showed that the element of S was successfully introduced into g-C 3 N 4 (CN) by replacing N to form C–S–C bonds and significantly enhanced the visible light absorption ability. The constructed heterojunction exhibited excellent photocatalytic hydrogen evolution under visible light. The best performance belonged to the sample of ZIS@100SCN. The corresponding H 2 production rate reached 9.3 mmol h −1 g −1 , which was 1.87-fold higher than that of the undoped one. More importantly, the heterojunction realized overall water splitting of H 2 and O 2 evolution simultaneously with good stability. The mechanism analysis indicted that introducing the element of S could regulate the band structure of CN and induce the charge transfer switching of a ZnIn 2 S 4 @g-C 3 N 4 (ZIS@CN) photocatalyst from Ⅰ-type to S-scheme, which promoted the efficient spatial charge separation and maintained the high redox ability of the ZIS and SCN. This work provides an insight in construction high performance S-scheme heterojunction for water splitting with a doping method.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Yadan Guo,Shuaihang Li,Fan Yang,Chenxi Li,Yaoping Guo,Keng Xuan,Guanghui Wang,Yunhai Liu,Jun Li
Photocatalytic reduction of U(VI) in aqueous solutions has been considered as an efficient and promising technology to solve radioactive U pollution. In this work, density functional theory (DFT) calculations were firstly employed to optimize and compare the adsorption configurations combined uranium with four given photocatalysts , then their adsorption energies were − 0.97 eV for AgFeO 2 , − 1.15 eV for Zn doped AgFeO 2 , − 1.73 eV for Cu doped AgFeO 2 and − 2.66 eV for S doped AgFeO 2 , respectively, indicating the sulfur doping plays a major role in U(VI) photoreduction . Herein, a visible light responsive efficient sulfur doped AgFeO 2 photocatalyst (S doped AgFeO 2 ) was synthesized and utilized to photocatalytic reduction of U(VI) in aqueous solutions. According to XRD , XPS and TEM analysis, the sulfur was successfully doped in AgFeO 2 via the hydrothermal method . The batch experimental showed that S doping enhanced the U(VI) photoreduction activity of AgFeO 2 , and the S-AFO-3 photocatalyst exhibited the highest photocatalytic activity (92.57%), which was 1.5 times than that of pure AgFeO 2 . ESR , PL and DFT results demonstrated that the enhancement of adsorbed U(VI) photoreduction was attributed to the own unique effect of oxygen vacancy defects and efficient charge separation of S doped AgFeO 2 photocatalyst. Due to its higher adsorption energies, fast-U(VI) photoreduction rate and superior chemical stability, the sulfur doped AgFeO 2 photocatalyst is hoped for water remediation containing U(VI) wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2015
·Vol. 31
·期 5
·730-735
·
IF 0.875
Xu Panpan,Wang Chunfeng,Sun Dong,Chen Yujuan,Zhuo Kelei
A facile approach was reported for the synthesis of nitrogen- and sulfur-co-doped carbon dots(N/S-CDs) by the sulfuric acid carbonization of 1-butyl-3-methylimidazolium 2-amino-3-mercaptopropionic acid( L -cysteine) salt([C 4 mim][Cys]) ionic liquid. The as-prepared N/S-CDs exhibited a good solubility, excitation-dependent emission behavior, and high resistance to photobleaching. Furthermore, the N/S-CDs were employed as a fluorescent probe for detecting Cu 2+ in real water samples with satisfactory recovery.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanyuan Guo,Yixun Gao,Yao Wang,Yi-Kuen Lee,Patrick J. French,Ahmad M. Umar Siddiqui,Hao Li,Guofu Zhou
The significant in situ multicolored patterning without changing printing tools nor substrate media still remains challenging, especially toward practical applications for anti-counterfeiting. This research invented a unique universal approach for the laser-induced in situ synthesis of colorful fluorescent patterns (from blue: CIE 0.15, 0.18 to red orange: CIE 0.36, 0.39) through the controlled formation of N, S doped carbon dots (CDs) in solid composite polymer films or hydrogel with a hierarchical and physically unclonable microsurface architecture for anti-counterfeiting. The in situ patterning approach, coupled with multi-layer technique, yielding designable blue, yellow, orange, and red orange color under 365 nm in the same pattern. A 5 cm 2 colorful pattern can be efficiently finished within 5 min without changing the substrate and the line width accuracy can be up to 300 μm. The absolute quantum efficiency of the blue pattern reached as high as 23%. The fluorescent patterns can be survived at indoor for 24 months. The hydrogen bonding interactions between the CDs precursor and polymer facilitated the generation, uniform dispersion and stabilization of CDs during the laser irradiation. The hypothesis that laser irradiation induced photochemical reactions of CD precursors within a polymer matrix was supported by thermodynamic assessments. The universality of in situ fluorescent patterning strategy was demonstrated by developing fluorescent patterns on both solid polymer films, hydrogel, pharmaceutical packaging and textile.
研究领域:
材料科学
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光学工程
·
化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Boxiao Zhao,Wang Gong,Xiaoming Liu,Huiqin Guo,Liushui Yan,Along Gao,Jun Lin
Here, we demonstrate a new type of S and C co-doped g-C 3 N 4 hexagonal ultra-thin tubular composite photocatalyst with extraordinary photocatalytic activity toward H 2 production from H 2 O with visible light irradiation. The S and C co-doped g-C 3 N 4 hexagonal ultra-thin tubular composite photocatalyst was prepared through a precursor calcinating process at 520 °C in a nitrogen atmosphere. The precursor was obtained through a supramolecular self-assembly strategy using melamine and thiolactic acid as raw materials by a crosslinking process of sulfhydryl and carboxyl groups. Benefiting from the synergetic effects of elements doping and the ultra-thin tubular morphology, the obtained S and C co-doped g-C 3 N 4 hexagonal ultra-thin tubular composite photocatalyst exhibits a highly efficient photocatalytic activity toward H 2 production from H 2 O with the irradiation of visible light, which is 24 times higher than that of the pristine g-C 3 N 4 . The optimized apparent quantum yield was demonstrated to be around 9.56 %. A possible photocatalytic mechanism relating to H 2 evolution from H 2 O with visible light irradiation concerning the prepared S and C co-doped g-C 3 N 4 hexagonal ultra-thin tubular composite photocatalyst was proposed. The current study might provide valuable insights for the design and synthesis of highly efficient photocatalysts for hydrogen production using solar energy.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Mengwei Guo,Zhuoming Wei,Qibo Zhang
The rational design and synthesis of highly efficient, precious metal-free electrocatalysts in the promotion of electrochemical water oxidation is essential for the sustainable use of renewable energy. Herein, an integrated, S-doped MnO x /Mn film developed on carbon paper (CP) formed by a two-step transformation approach that includes template-free electrodeposition and in-situ electrochemical oxidation is employed as an efficient oxygen evolution reaction (OER) electrocatalyst. The doping of S and in-situ electro-oxidation lead to a tailored electronic structure and phase composition , which endow the composite electrode with a significantly enhanced OER catalytic performance. This S-doped integrated electrode perfectly combines highly active MnO x outer layers with conductive metallic Mn inner layers to offer abundant catalytic interfaces and electronic paths, leading to favorable reaction kinetics. As a result, the optimal S-doped MnO x /Mn/CP offers a low overpotential of 435 mV at 10 mA cm −2 with a Tafel slope of 89.97 mV dec −1 as well as improved stability. Impressively, a highly intrinsic catalytic activity with a turnover frequency of 0.0112 s −1 is obtained for S-doped MnO x /Mn/CP, which is 4.2-fold higher than that of MnO x /Mn/CP. S doping plays a critical role in stabilizing the Mn III O x active phase and is ultimately responsible for the enhanced catalytic performance. This work provides an integrated design concept and S doping approach suitable for boosting the OER catalytic performance of MnO x .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
·
IF 1.901
Fan Li,Wanjun Xu,Linyi Lu,Kai Zhou,Zhining Xia
The high-quality sulfur-doped graphite (SGi) was prepared from concentrated sulfuric acid-graphite intercalation compounds (H 2 SO 4 -GICs) by solid-state microwave irradiation, where H 2 SO 4 was the sulfur (S) source and S-doping occurred within a minute. The preparation of H 2 SO 4 -GICs was a key step for S-doping and exfoliation process. Notably, it was found that S-doping was influenced by the dosage of H 2 SO 4 , where the lower dosage of H 2 SO 4 was beneficial for the S-doping. The exfoliation efficiency was greatly affected by the temperature and dosage of oxidant, where lower temperature and lower dosage of KMnO 4 guaranteed efficient exfoliation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）