CuO nanoparticles doping recovered the photocatalytic antialgal activity of graphitic carbon nitride

Cao, Xuesong; Yue, Le; Lian, Fei; Wang, Chuanxi; Cheng, Bingxu; Lv, Jinze; Wang, Zhenyu; Xing, Baoshan

doi:10.1016/j.jhazmat.2020.123621

Cited by 44 publications

(14 citation statements)

References 46 publications

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“…The possible proposed mechanism for this event was that by doping CuO nanoparticles, the heterogeneous accumulation between graphite carbon nitride and algal cells increases, and then reactive oxygen species (ROS) production increases. 29 Wei et al investigated the effects of different concentrations of SiO 2 nanoparticles on Scenedesmus obliquus algae. They showed that these nanoparticles did not inhibit the growth of the algae at first.…”

Section: Resultsmentioning

confidence: 99%

Toxicity of Nd₂WO₆ nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Toxicity of Nd₂WO₆ nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

et al. 2021

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“…All of them agree on the same concept and that is the relative hydrophobicity of this 2D nanosheet. Some references have pointed out that gCN possesses a hydrophobic surface [64, 73,100,101], and some others have used the phrase "the relative hydrophobic surface" for gCN [102][103][104]. Liu et al [93] have studied the mechanisms of water desalination across the nanoporous multilayer gCN membranes with different pore diameters using non-equilibrium molecular dynamics simulations.…”

Section: Membrane Desalination Performance Using Dcmdmentioning

confidence: 99%

“…They have reported that the surface of gCN is somewhat hydrophobic with a contact angle of about 70º. Cao and coworkers [103] have investigated the mechanisms of humic acid impact on the photocatalytic antialgal activities of gCN and copper oxide (CuO) nanoparticles doped gCN to harmful algae. They have introduced gCN as a hydrophobic nanomaterial with a contact angle equal to 77.4 0.9º.…”

Section: Membrane Desalination Performance Using Dcmdmentioning

confidence: 99%

High-performance robust 2D graphitic carbon nitride nanosheets embedded membranes for desalination through direct contact membrane distillation

Ashrafian

Saljoughi

Mousavi

et al. 2023

Preprint

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Two-dimensional (2D) graphitic carbon nitride (g-C3N4)-based membranes have received widespread attention in the last ten years due to their fantastic separation performance. In the present investigation, for the first time, we tried to assess the desalination performance of membranes incorporated with g-C3N4 nanosheets through the membrane distillation (MD) process. for this purpose, different concentrations (0-0.06 wt.%) of synthesized nanosheets were embedded as fillers within the hydrophobic polyvinylidene fluoride (PVDF) matrix by using simple phase inversion method. Various techniques such as FTIR, XRD, SEM, AFM, water contact angle and LEP, tensile strength measurements as well as direct contact membrane distillation (DCMD) experiments were utilized to study the effect of the g-C3N4 contents on the elemental properties, crystalline structure, morphology, topography, surface hydrophobicity, mechanical resistance, and desalination performance of the membranes. The surface roughness parameters suggest that the membrane surface became even rougher by integrating g-C3N4 nanosheets into the membrane matrix. Upon loading with a small amount of 0.03 wt.% g-C3N4 in the polymer network, the water contact angle and LEP augmented from circa 80.5º and 6 bar for the pure PVDF membrane to 95.2º and 8 bar, respectively. Adding the g-C3N4 nanosheets also improved the mechanical properties of the PVDF membrane; so that, both the tensile strength and the elongation at break increased to 21.32% and 36.46% in comparison to the pristine PVDF membrane, respectively. The prepared mixed matrix membranes favorably improved MD performance; so that, 0.03 wt.% g-C3N4 embedded membrane exhibited a flux of 27.63 kg/m2h with an enhancement of 70% relative to its pure counterpart, despite having a trace amount of the nanosheets. Continuous testing for up to 24 h filtration of a 3.5 wt.% NaCl solution still showed a stable flux and almost complete salt rejection (i.e., 100%) for the mentioned mixed matrix membrane. This work holds promise for developing next-generation MD membranes with superior desalination performance in terms of water vapor permeability and salt rejection.

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“…The crystal structure of samples before and after effervescence treatment was recorded in the XRD patterns (Figure S3a, Supporting Information). The raw g-CN, Cu-CN, and Cu-CN-ef show two dominant peaks centered at 13.1° and 27.5°, corresponding to the (100) and (002) planes, [21][22][23] and they represent the interplanar separation and the type of an interplanar stacking structure of g-CN materials, respectively. [24] According to the XRD results, the corresponding peaks at 35.3° and 38.5° ascribed to (002) and (111) lattice plane of CuO can be observed, which proves that the main existing form of Cu element in the as-synthesized Cu/g-C 3 N 4 could be CuO.…”

Section: Characterization Of Cu-cn-ef Photo-fenton Catalyst Before An...mentioning

confidence: 99%

A Rapid Effervescent Route to Rational Activation of Cu/g‐C₃N₄ and bulk MoS₂ Cocatalyst for Highly Efficient and Robust Photo‐Fenton Process

Ding

Kang

et al. 2022

Adv Materials Inter

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hazardous substances. Among the popular AOPs, the homogeneous and heterogeneous Fenton reactions are most promising with their preponderance in the vast application range, strong anti-interference ability, simple operation, and rapid degradation speeds. [1,2] However, three main limitations still challenge the practical application of the classic homogeneous Fenton process using iron or copper ions, including the slow-cycling efficiency of Fe 3+ /Fe 2+ or Cu 2+ /Cu + , accumulation of iron/copper-containing sludge, and strict requirement of low pH (3.0-4.0). [3,4] Researchers have gradually turned to heterogeneous Fenton-like catalysis to avoid the generation of ferric hydroxide sludge and circumvent the limitation of the acidic pH range on homogeneous Fenton reactions. [5] To address the aforementioned issues, strenuous efforts have been devoted to designing Fe or Cu species in solid catalysts. They are usually given priority in superior heterogeneous Fenton catalysts because of the low cost, negligible toxicity, high catalytic activity, and ease of recovery. [6] Therefore, combining Fenton-like systems with photocatalysts has attracted intensive research interest with their rapid development.Graphitic carbon nitride (g-CN)-supported Fe, Cu catalysts are well recognized as good choices for heterogeneous photo-Fenton catalysts. As the host, g-CN serves as a visible-lightactive metal-free polymeric semiconductor with an appropriate band gap (≈2.7 eV) to harvest solar photon energy efficiently. [7] It can also be employed to construct various highly tailorable composite photocatalysts with adjustable compositions, sizes, pore structures, morphology, and electronic structures. [8][9][10] g-CN can be loaded with Fe or Cu atoms and nanoparticles to form high-performance Fe-CN or Cu-CN photo-Fenton systems, which further accelerates the rate-limiting Fe 3+ /Fe 2+ or Cu 2+ /Cu + reduction process and circulation of high-valence metal ions in the presence of light, thus avoiding the generation of hazardous iron or copper sludge.Up to now, the efficiency of photo-Fenton systems is still unsatisfactory for industrial applications. To further improve the efficiency of heterogeneous Fenton-like reactions, much effort has been carried out to optimize AOPs, including the strategy of adding co-catalysts to boost •OH or singlet oxygen Heterogeneous Fenton-like process with a wide pH range is a promising alternative to traditional homogeneous Fenton reactions. Recently, the boosting effect of MoS 2 cocatalysts is widely recognized in Fenton reactions, and the primary mechanism is the promotion of the reduction and recycling of high-valence metal ions. Unfortunately, integrating heterogeneous Fenton-like catalysts and MoS 2 cocatalyst to form an efficient system remains challenging due to the severe deactivation of MoS 2 and the inability of simple physical mixing to speed up the reaction. For the first time, the direct activation of commercially available bulk MoS 2 powder in a durable acidic micro environment is achieved. The fo...

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CuO nanoparticles doping recovered the photocatalytic antialgal activity of graphitic carbon nitride

Cited by 44 publications

References 46 publications

Toxicity of Nd₂WO₆ nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

Toxicity of Nd₂WO₆ nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

High-performance robust 2D graphitic carbon nitride nanosheets embedded membranes for desalination through direct contact membrane distillation

A Rapid Effervescent Route to Rational Activation of Cu/g‐C₃N₄ and bulk MoS₂ Cocatalyst for Highly Efficient and Robust Photo‐Fenton Process

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CuO nanoparticles doping recovered the photocatalytic antialgal activity of graphitic carbon nitride

Cited by 44 publications

References 46 publications

Toxicity of Nd2WO6 nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

Toxicity of Nd2WO6 nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

High-performance robust 2D graphitic carbon nitride nanosheets embedded membranes for desalination through direct contact membrane distillation

A Rapid Effervescent Route to Rational Activation of Cu/g‐C3N4 and bulk MoS2 Cocatalyst for Highly Efficient and Robust Photo‐Fenton Process

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Toxicity of Nd₂WO₆ nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

Toxicity of Nd₂WO₆ nanoparticles to the microalga Dunaliella salina: synthesis of nanoparticles and investigation of their impact on microalgae

A Rapid Effervescent Route to Rational Activation of Cu/g‐C₃N₄ and bulk MoS₂ Cocatalyst for Highly Efficient and Robust Photo‐Fenton Process