Cation-Exchange Synthesis of Cu<sub>2</sub>Se Nanobelts and Thermal Conversion to Porous CuO Nanobelts with Highly Selective Sensing toward H<sub>2</sub>S

Su, Yao; Li, Gang; Guo, Zheng; Li, Yongyu; Li, Yi‐Xiang; Huang, Xing‐Jiu; Liu, Jinhuai

doi:10.1021/acsanm.7b00106

Cited by 25 publications

(20 citation statements)

References 45 publications

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“…The Se 3d pattern for Cu 2 Se/ PUS located at 54.2 eV was indexed to the lattice Se 2− in Cu 2 Se (shown in Figure 2e). 22 The molar ratio of copper and selenium in Cu 2 Se/PUS was determined to be approximately 1:2 based on quantitative calculation using the XPS data. Thus, the copper selenide on the Cu 2 Se/PUS was further demonstrated to be Cu 2 Se, which is in good agreement with the results obtained from XRD and TEM.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Surface-Engineered Sponge Decorated with Copper Selenide for Highly Efficient Gas-Phase Mercury Immobilization

Yang

et al. 2020

Environ. Sci. Technol.

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The paramount challenge in design and synthesis of materials for vapor-phase elemental mercury (Hg0) immobilization is to achieve a balance between performance and economy for practical applications. Herein, a newly designed electroless plating coupled with an in situ selenization method was developed to construct a copper selenide (Cu2Se)-functionalized commercial polyurethane sponge (PUS) as an efficient Hg0 trap. Intrinsic features such as easy availability of the raw material, facile preparation, and excellent performance guarantee the Cu2Se/PUS to be applicable in industrial uses. The Cu2Se/PUS exhibits a maximum adsorption capacity (Q m,Cu2Se/PUS) of 25.90 mg·g–1, while this value is 758.80 mg·g–1 when normalized to the Cu2Se coating amount. This value of Q m,Cu2Se is equal to 79.7% of its corresponding theoretical value (Q t,Cu2Se), far exceeding the availability of Cu2Se anchored on other supports. Meanwhile, the Cu2Se/PUS exhibited a quick response for Hg0, with an extremely high uptake rate of 1275.84 μg·g–1·min–1. Even under harsh conditions, the Cu2Se/PUS still immobilizes Hg0 effectively, which is crucial for real-world applications. This work not only provides a promising trap for permanent Hg0 sequestration from industrial sources but also illustrates a versatile platform for the economic fabrication and practical application of advanced functional sponges in diverse environmental remediation.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Surface-Engineered Sponge Decorated with Copper Selenide for Highly Efficient Gas-Phase Mercury Immobilization

Yang

et al. 2020

Environ. Sci. Technol.

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“…The peak at 54.2 eV corresponded to the lattice Se 2− in CuSe. 28,29 In addition to Se 2− , no other selenium species were detected, indicating that the selenite in the precursor (Na 2 SeO 3 ) was completely converted into the selenide in CuSe.…”

Section: Resultsmentioning

confidence: 99%

Nanosized Copper Selenide for Mercury Removal from Indoor Air and Emergency Disposal of Liquid Mercury Leakage

Wang

Yang

et al. 2019

Ind. Eng. Chem. Res.

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Factories manufacturing mercury (Hg)-containing devices often outflow exhaust gas with a high concentration of Hg and face the risk of liquid Hg leakage. Herein, nanosized CuSe was prepared and employed for elemental mercury (Hg0) capture and the emergency disposal of liquid Hg from accidental leakage. CuSe exhibited an excellent Hg0 capture performance at room temperature. The Hg0 concentration could be efficiently reduced from 1500 to below 1 μg·m–3 under a gaseous hourly space velocity of 1.2 × 105 h–1. The adsorbent amount of CuSe was about 210.8 mg·g–1, which was about 219.5 times higher than that of a sulfur-functionalized activated carbon sorbent used exclusively for Hg0 removal. CuSe exhibited excellent adaptability at different temperatures and high-humidity surroundings. CuSe could effectively stabilize the leaked liquid Hg. The initial liquid Hg adsorption rate for CuSe was high, up to 69.1 μg·g–1·min–1, 138–2303-fold greater than that for other adsorbents reported in the literature. The impressive performance of CuSe for Hg0 immobilization was primarily attributed to the strong affinity of Se for Hg. The adsorption product of Hg (i.e., HgSe) exhibited sufficient thermal stability, which guaranteed the long-term storage of Hg-laden CuSe.

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“…In the case of Cu 2 O@Cu 2 Se/NF, few new diffraction peaks appear, in addition to those of Cu 2 O and NF, which can be indexed as cubic Cu 2 Se (JCPDS No. 88–2043) . Interestingly, no impurity peaks corresponding to Cu 2‐x Se or CuSe are observed.…”

Section: Resultsmentioning

confidence: 99%

Cu₂O−Cu₂Se Mixed‐Phase Nanoflake Arrays: pH‐Universal Hydrogen Evolution Reactions with Ultralow Overpotential

et al. 2019

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Most developed hydrogen evolution reaction (HER) electrocatalysts have pH-dependent functionalities, which limit their universal applications. Pt, the ideal HER electrocatalyst, is also highly effective in specific pH conditions. In the present article, we report a copper-based transition-metal chalcogenide from anion engineering. Hierarchical three-dimensional (3D) Cu 2 OÀ Cu 2 Se nanoflake arrays (COCS NFs) are grown directly on nickel foam (NF) by combining the rapid electrodeposition technique with the room temperature wet-chemical selenization method. Via the synergetic effects of the proper ratio of Se and O, as-synthesized COCS NFs manage to accomplish keyrequirements for pH-universal HER performances with overpotential values of 52.9, 62.8, and 77.8 mV, in alkaline, neutral, and acidic media, respectively, at 10 mA cm À 2 . The electrocatalyst also possesses superb stability at constant 10 mA cm À 2 current density for 50 h in all electrolytes. This work offers a synthesis protocol of a mixed-anion composite with the revelation about the importance of anion modulation towards electrode surface properties and HER performances.In recent years, different nanostructures and physical properties such as optical properties [9] and thermoelectricity [10] of transition-metal chalcogenides (TMCs) make them indispensable in various fields of research like energy conversion and storage, [11,12] dye-sensitized solar cells, [13] and photoelectrocatalysis. [14,15] Moreover, the inefficiency of energy-efficient electrodes in water electrolysis industry creates a potential market for highly efficient TMCs for electrocatalytic HER. [16,17] Recently, numerous TMCs, including CoS 2 , [18] CoSe x , [19,20] NiS 2 , [21] Ni 3 S 2 , [21] NiSe x , [22,23] SnSe 2 , [24] MoS 2 , [25] MoSe 2 , [26] WS 2 , [27] WSe 2 , [28] and ReSe 2 , [29] are studied for HER due to their low-cost and reasonable HER performances. However, individual metal sulfides or selenides as electrocatalysts exhibit nonideal electron transport and slow kinetics during HER because of their low electrical conductivities. More recently, Cu-based TMCs have garnered attention because of their abundant nature and low-cost. [30] For instance, Cu 2-x Se has an efficient HER activity in an acidic electrolyte, [31] but it is necessary to improve its HER performance in pH-universal electrolytes for commercialization. Recently published research works suggest that manipulation of the metal oxide surface is an useful direction for enhancing their HER performance because oxides such as NiO, [32] Co 3 O 4 , [33] Cu 2 O, [34] CeO 2 , [35] Mn 3 O 4 , [6] and TiO 2 [36] can participate in the reaction as water splitting promoters for HER. Although the use of Cu 2 O itself as a HER electrocatalyst is restrained due to its high overpotential and low current densities, the combination of Cu 2 Se with water dissociation promoters (Cu 2 O) by engineering the anion contents is expected to not only boost the HER kinetic but also optimize the free energy for hydrogen adsorption to achi...

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Cation-Exchange Synthesis of Cu₂Se Nanobelts and Thermal Conversion to Porous CuO Nanobelts with Highly Selective Sensing toward H₂S

Cited by 25 publications

References 45 publications

Surface-Engineered Sponge Decorated with Copper Selenide for Highly Efficient Gas-Phase Mercury Immobilization

Surface-Engineered Sponge Decorated with Copper Selenide for Highly Efficient Gas-Phase Mercury Immobilization

Nanosized Copper Selenide for Mercury Removal from Indoor Air and Emergency Disposal of Liquid Mercury Leakage

Cu₂O−Cu₂Se Mixed‐Phase Nanoflake Arrays: pH‐Universal Hydrogen Evolution Reactions with Ultralow Overpotential

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Cation-Exchange Synthesis of Cu2Se Nanobelts and Thermal Conversion to Porous CuO Nanobelts with Highly Selective Sensing toward H2S

Cited by 25 publications

References 45 publications

Surface-Engineered Sponge Decorated with Copper Selenide for Highly Efficient Gas-Phase Mercury Immobilization

Surface-Engineered Sponge Decorated with Copper Selenide for Highly Efficient Gas-Phase Mercury Immobilization

Nanosized Copper Selenide for Mercury Removal from Indoor Air and Emergency Disposal of Liquid Mercury Leakage

Cu2O−Cu2Se Mixed‐Phase Nanoflake Arrays: pH‐Universal Hydrogen Evolution Reactions with Ultralow Overpotential

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Cation-Exchange Synthesis of Cu₂Se Nanobelts and Thermal Conversion to Porous CuO Nanobelts with Highly Selective Sensing toward H₂S

Cu₂O−Cu₂Se Mixed‐Phase Nanoflake Arrays: pH‐Universal Hydrogen Evolution Reactions with Ultralow Overpotential