Degradation Of Dye Pollutants Research Articles

Transpiration-prompted Photocatalytic Degradation of Dye Pollutant with AuNPs/PANI Based Cryogels

Transpiration-prompted Photocatalytic Degradation of Dye Pollutant with AuNPs/PANI Based Cryogels

Enhanced tribocatalytic degradation of dye pollutants through governing the charge accumulations on the surface of ferroelectric barium zirconium titanate particles

The phenomenon triboelectricity has recently been demonstrated great potentials for mitigating environmental pollutions. In this study, with the aim of investigating the crucial parameters for the phenomenon, a typical perovskite ferroelectric micron-sized Ba(Zr0.05Ti0.95)O3 (BZT) particle has been fabricated as a tribocatalyst by the conventional solid state method for degrading the common organic dye pollutants such as rhodamine B (RhB), methylene blue (MB) and methyl orange (MO) via magnetic stirring. Our results show that the accumulation of triboelectric charges on the micron-sized particle surfaces is crucial for inducing high performances of the tribocatalysis. Various experimental parameters such as surface roughness of the reaction vessel, triboelectric charge density (TECD) and polarization states of the ferroelectric tribocatalyst have also been shown important for achieving the strong tribocatalytic activity. A high kinetic rate constant of 0.4482 h−1 (or 100% degradation in 7 h) has been achieved in the degradation of RhB using poled micron-sized BZT particles stirred with polytetrafluoroethylene (PTFE) magnetic bars (which can generate a high TECD). The enhanced ferroelectricity and tilted bandgap of the tribocatalyst caused by a higher nanodomain density and dielectric screening phenomenon through the poling treatment have been considered in elucidating the high performance engendered by the ferroelectric tribocatalyst.

Enhanced photocatalytic activity of nano-silica/copper plasmon by aminofunctional silane for dye pollutant degradation.

The synthesis of silica gel nanostructures and loading it with copper specie via a hydrothermal process were performed. The sample is treated with an amino-functional reagent 3-aminopropyl triethoxysilane (APTES). The products were characterized by X-ray diffraction (XRD), FT-IR, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), TGA/DSC measurements, and X-ray photoelectron spectroscopy (XPS). The photocatalytic activities of the nanostructures were studied for degradation of methylene blue dye (as a classic dye contaminant) in aqueous solution utilizing visible light source. The results displayed that the sample treated with APTES is much more effective in photocatalytic degradation of methylene blue. This modified catalyst could eliminate methylene blue dye (50mL, 18µgmL-1) within 60min under visible light. The degradation efficiency was increased by shortening the degradation time to 30min in the alkaline medium. The pseudo-first-order model well describes the kinetics of the reaction.

Visible-light enhanced azo dye degradation and power generation in a microbial photoelectrochemical cell using AgBr/ZnO composite photocathode

In this study, a dual-chamber microbial photoelectrochemical cell (MPEC) composed of a bio anode and a photoresponse AgBr/ZnO-modified graphite as a photocathode was investigated. The cell efficacy in degrading reactive black 5 (RB5), a diazo dye, in the cathodic chamber and simultaneously, electricity generation was analyzed. The synthesized AgBr/ZnO photocatalyst was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV–vis diffuse reflectance spectra (UV-vis DRS), photoluminescence (PL), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). Under light irradiation, the MPEC equipped with AgBr/ZnO-modified photocathode yielded 61% RB5 dye degradation over 72 h which indicated a highly enhanced performance compared with the irradiated bare graphite (11.74%). Besides, the maximum power density produced was 53.8 mW m−2 under visible light illumination and 32.5 mW m−2 in dark conditions. The MPEC reported in this research seems to be a promising system for bioelectricity generation, wastewater treatment in the anodic chamber, and also, dye pollutant degradation in the cathodic chamber.

Sunlight activated S-scheme ZnO-CoTe binary photocatalyst for effective degradation of dye pollutants from wastewater

In the present work, ZnO-CoTe photocatalyst with S-scheme transfer mechanism was successfully synthesized by hydrothermal method and characterized via various analytical techniques. The grown ZnO-CoTe nanocomposite was tested for the photodegradation of cationic and anionic dyes under sunlight irradiation. Compared with pure ZnO and CoTe catalysts, ZnO-CoTe nanocomposite exhibited superior photocatalytic degradation and degraded 98.5% methyl red (MR) and 99.8% methylene blue (MB) dyes within 60 min of sunlight illumination, having a higher rate constant 0.0626 min−1, and 0.0929 min−1, respectively. Furthermore, the band structure of ZnO and CoTe align such that the S-scheme charge transfer mechanism occurred, which could effectively improve charge carriers migration and separation, leading to high photocatalytic degradation capability than that of pure ZnO and CoTe catalysts. Because of its promising photocatalytic performance, the ZnO-CoTe nanocomposites can be effectively used for future environmental applications.

Alginate doped graphene oxide – TiO2 – Fe3O4 nanocomposite: preparation, characterization, and application of sonophotocatalyst for efficient decomposition of an organic dye

ABSTRACT In this research, the alginate doped graphene oxide (GO)-Fe3O4-TiO2 photomagnetic nanocomposite was synthesised through a three-step method. For comparison, alginate-GO was also prepared. The synthesised materials were characterised through FTIR, XRD, TGA, SEM, EDX, and TEM techniques. The photomagnetic properties of the resultant nanocomposite were evaluated by VSM. Degradation of Malachite green as a dye pollutant was studied in the presence of alginate (Alg), Alg-GO, and Alg-GO-Fe3O4-TiO2 nanocomposite using a sonophotocatalysis technique. The results showed, that, Alg-GO-Fe3O4-TiO2 nanocomposite has high efficiency in the removal of Malachite green. Recycling experiments displayed that the degradation efficiency dropped only by 12%, after five successive runs. and makes it a promising catalyst for efficient degradation of dye pollutants in the practical applications.

Dual roles of MoS2 nanosheets in advanced oxidation Processes: Activating permonosulfate and quenching radicals

Peroxymonosulfate (PMS) based advanced oxidation processes (AOPs) have received increasing attention in wastewater treatment attributed to the high efficiency for organic pollutants removal. Our study reported that single layer MoS2 exhibited greatly efficient PMS activation through one electron transfer and thus showed excellent orange II (OII) degradation performance. Sulfate radical (SO4∙−) and hydroxyl radical (∙OH) were detected as the primary reactive oxygen species (ROS) in the activation reaction system by radical quenching experiments and EPR spectroscopy. More importantly, we note that excessive dosage of 1T-dominated MoS2 had a quenching effect on SO4∙− and ∙OH, which caused the decline of OII degradation efficiency. Compared to 1T-dominated MoS2, 2H-MoS2 nanomaterial was a weaker radical quencher and exhibited better organic dye pollutant degradation performance owing to its better chemical stability and adsorptive property. In addition, aligned stacks of MoS2 nanosheets were prepared to preserve oxidation surface/edges, which weakened the ROS quenching effect and thus improved OII removal capacity. The dual roles of MoS2 nanosheets, i.e. activating PMS and quenching free radicals, were systematically studied for the first time. Meanwhile, the protection of oxidation active sites proved to be a feasible way of suppressing ROS quenching effect to improve the degradation performance in PMS-AOPs, and thus providing a new sight for the activator design.

Magnetic Ag3PO4/Ag2CrO4/Fe/Fe3O4 quaternary composite for improved solar-driven photocatalytic degradation of cationic dyes under natural solar radiation

To improve the visible light utilization for degradation of dye pollutants, novel magnetic Ag3PO4/Ag2CrO4/Fe/Fe3O4 composite has been synthesized for the first time via a simple two-step process including solvothermal route and co-precipitation method. The as-fabricated Ag3PO4/Ag2CrO4/Fe/Fe3O4 composite were characterized by using XRD, FE-SEM, TEM, EDS, VSM, PL, FTIR and UV–vis DRS for the crystal structures, chemical compositions, morphologies, optical and photocatalytic properties. As-fabricated composite used for degradation of binary mixture of Methylene Blue (MB) and Rhodamine B (RhB) under solar irradiation. The Ag3PO4/Ag2CrO4/Fe/Fe3O4 composite photocatalyst exhibited high degradation activity compared to Fe/Fe3O4, Ag2CrO4/Fe/Fe3O4, Ag3PO4/Fe/Fe3O4, Ag3PO4/Ag2CrO4 under solar light irradiation. Due to the good conductivity, the electrons in Ag3PO4 and Ag2CrO4 could be transported to Fe/Fe3O4, which inhibited the recombination of electron-hole pairs. In addition, the role of Fe/Fe3O4 in the photocatalytic mechanism is also discussed in detail. The optimum conditions were found to be 60 min, 7.0, 0.025 g, 12.0 and 4.0 mg/L for irradiation time, pH, photocatalyst dosage and initial concentration of MB and RhB, respectively. At the optimum condition, the photocatalytic degradation percentages of MB and RhB were found to be 93.37 and 71.22%, respectively. The increased photocatalytic activity of prepared magnetic composite is attributed to expanded absorption in the visible light region, and formation of the S-scheme system.

Strategic combination of metal–organic frameworks and C3N4 for expeditious photocatalytic degradation of dye pollutants

The potential of fabricated silver and bismuth Co-N-doped imidazolate embedded into graphitic nitride BiO-Ag(0)/C3N4@ZIF-67 for the degradation of Methylene blue (MB) and Congo red (CR) dyes have been reported. The synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy photoluminescence (PL) spectroscopy, and electrochemical impedance spectroscopy (EIS). The band gaps of ZIF-67, C3N4and composites were calculated using Tauc plot.Besides,it was revealed that incorporation of silver, bismuth, and C3N4 reduced the band gap energy to 2.2eV. The introduction of metallic species in the precursors promoted better charge separation behavior towards photogenerated electron and hole in the heterojunction composite. Two perilous organic dyes; MB and CR were degraded under natural sunlight irradiation. The photocatalytic efficiency of BiO-Ag(0)/C3N4@ZIF-67 for the removal of CR and MB significantly increased compared to bare ZIF-67. The enhanced photocatalytic activity of BiO-Ag(0)/C3N4@ZIF-67 is attributed to the higher surface area and Plasmon effect of noble silver metal. The solar light-triggered degradation of MB and CR yielded efficient efficiency of 96.5 and 90% for 10mg/L of dye solution each. Additionally, the effect of pH was evaluated for optimizing degradation of CR and MB dyes. The kinetics studies of both CR and MB were clarified according to Langmuir model. The reusability and quenching investigation of active species were carried out to discover find catalytic potential of the composite. Besides, possible dye degradation mechanism was proposed for BiO-Ag(0)/C3N4@ZIF-67. The obtained results indicated that solar-light triggered photocatalyst BiO-Ag(0)/C3N4@ZIF-67 can be employed as a promising approach for photocatalytic elimination of organic pollutants.

Studies on Synthesis and Characterization of Fe3O4@SiO2@Ru Hybrid Magnetic Composites for Reusable Photocatalytic Application

Degradation of dye pollutants by the photocatalytic process has been regarded as the most efficient green method for removal organic dyes from contaminated water. The current research work describes the synthesis of Fe3O4@SiO2@Ru hybrid magnetic composites (HMCs) and their photocatalytic degradation of two azo dye pollutants, methyl orange (MO) and methyl red (MR), under irradiation of visible light. The synthesis of Fe3O4@SiO2@Ru HMCs involves three stages, including synthesis of Fe3O4 magnetic microspheres (MMSs), followed by silica (SiO2) coating to get Fe3O4@SiO2 MMSs, and then incorporation of presynthesized Ru nanoparticles (~3 nm) onto the surface of Fe3O4@SiO2 HMCs. The synthesized HMCs were characterized by XRD, FTIR, TEM, EDS, XPS, BET analysis, UV-DRS, PL spectroscopy, and VSM to study the physical and chemical properties. Furthermore, the narrow band gap energy of the HMC photocatalyst is a significant parameter that provides high photocatalytic properties due to the high light adsorption. The photocatalytic activity of synthesized Fe3O4@SiO2@Ru HMCs was assessed by researching their ability to degrade the aqueous solution of MO and MR dyes under visible radiation, and the influence of various functional parameters on photocatalytic degradation has also been studied. The results indicate that the photocatalytic degradation of MO and MR dyes is more than 90%, and acid media favors better degradation. The probable mechanism of photodegradation of azo dyes by Fe3O4@SiO2@Ru HMC catalysts has been proposed. Furthermore, due to the strong ferromagnetic Fe3O4 core, HMCs were easily separated from the solution after the photocatalytic degradation process for reuse. Also, the photocatalytic activity after six cycles of use is greater than 90%, suggesting the stability of the synthesized Fe3O4@SiO2@Ru HMCs.

Effect of CaO/SiO2 compositions on the structure formation of mesoporous calcium silicate (CaSiO3) composite particles as adsorbent for organic dye removal

The primary objective of this paper was to synthesize a calcium silicate (CaSiO3) and investigate the effect of CaO/SiO2 compositions on the structure formation of synthetic material. CaSiO3 was prepared through the solid-state method using CaO from chicken eggshells and commercial SiO2 powder as starting material. To investigate the effect of CaO/SiO2 on the structure of CaSiO3, the different molar ratios of CaO/SiO2 (i.e., 1:1, 1:7, 2:7, and 3:7) were used. BET results show the resulting product has a high specific surface area of 13,18 ±30.53 m2g-1 and a pore size of 15,16 ±18.4 nm obtained as mesoporous material. The obtained CaSiO3 particles, then to be applied for the degradation of dye pollutants in water. The adsorption capacity was evaluated by methylene blue (MB) and brilliant green (BG) degradation. The parameters of CaO/SiO2 mass ratio and contact time on the degradation efficiency of BG and MB were investigated, respectively. The results showed that the best model for BG adsorption onto CaSiO3 was a pseudo-first-order model, whereas the best model for MB adsorption was a pseudo-second-order model.

Controlled synthesis and structural modulation to boost intrinsic photocatalytic activity of BiVO4

A feasible solution-processed surface modification is presented to boost the intrinsic photoactivity of BiVO4via hydrothermal, solvothermal and solid-state reactions, enabling as a promising photocatalyst for degradation of dye pollutants in water.

Photocatalytic activity of Ag-Ag3PO4/Cellulose aerogel composite for degradation of dye pollutants under visible light irradiation

In this research, Ag-Ag3PO4/Cellulose aerogel composite was synthesized using hydrothermal reduction and freeze-drying methods. By combining the photocatalytic activity of the semiconductor Ag-Ag3PO4 and cellulose aerogel synthesized from agricultural waste sources, the synthesized Ag-Ag3PO4/Cellulose aerogel composite has overcome the disadvantages of pure Ag3PO4 and significantly improved the photocatalytic activity. Structural characteristics, morphology, surface area of the materials were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption-desorption and UV–vis diffuse reflectance spectroscopy (UV-vis DRS) methods. From the obtained results, composite has narrow bandgap energy (2.275 eV) and excellent catalytic performance in the photodegradation of dye pollutants (99% MB and 77% RY 145 degraded after 4 h, and only a minor change in the efficiency observed after four consecutive tests). It demonstrates the development of new catalysts made from agricultural waste sources that show high stability, ease of fabrication and can operate in natural light for environmental remediation.

A Mesoporous Lead-Doped Titanium Oxide Compound with High Performance and Recyclability in I2 Uptake and Photocatalysis.

A three-dimensional (3D) mesoporous material with an atomically precise structure, Ti16Pb5O16(C6H5CO2)2(OCH3)40 (Ti16Pb5), comprised of a novel high-nuclearity Pb-doped titanium oxide cluster (TOC), was synthesized. Ti16Pb5 exhibited a surface area of 45 m2 g-1 and a pore diameter of 3.5 nm. It exhibited an uptake capacity of I2 of ≤2.2 g g-1 in vapor, and the performance was maintained after seven uptake-release cycles. Ti16Pb5 also showed a high adsorption ratio and capacity (93% and 3.1 g g-1) in hexane. The characterization data, including Fourier transform infrared, Raman, and powder X-ray diffraction, suggested the lattice structure of Ti16Pb5 was rigid and I2 was accommodated in the pores of Ti16Pb5. To the best of our knowledge, this is the first example of using a TOC in I2 adsorption. In addition, Ti16Pb5 showed excellent activity and recyclability in visible-light degradation of dye pollutants and photocurrent generation. Our structural analysis suggested the alkoxide ligands within the channels of Ti16Pb5 build up a confined polar environment and thereby facilitate I2 accommodation, and meanwhile, the improved performances and stabilities of Ti16Pb5 are correlated with its cluster-based, 3D hierarchical structure.

Bifunctional oxidase-peroxidase inorganic nanozyme catalytic cascade for wastewater remediation

Nanozymes are inorganic nanoparticles with enzyme-like features. Noble metals and metal oxide-based nanomaterials can present enzyme-mimicking behavior mediating catalytic reactions including oxidase-, peroxidase-, catalase-, and superoxide dismutase-like activities with important applications in environmental and biomedical grounds. Thus, in this study, it was designed and developed a novel nanosystem that exploits the oxidase-like (OD) behavior of gold nanoparticles (AuNPs, GOLDzyme) and the peroxidase-like (POD) characteristics of cobalt-doped magnetic iron oxide nanoparticles (MIONs, Co-MIONzyme) amalgamated in an inorganic-inorganic bi-nanozyme cascade for the degradation of dye pollutants. GOLDzyme and Co-MIONzyme nanomaterials were synthesized and stabilized by citrate and carboxymethylcellulose (CMC) ligands, respectively, using a green aqueous colloidal process at mild conditions. The physicochemical characterization results indicated that water-dispersible colloidal supramolecular nanostructures were effectively produced, with core-shell morphologies (i.e., inorganic nanoparticle core/organic-shell). The AuNPs (GOLDzyme) presented crystalline nanostructure, with a uniform spherical shape, zeta potential (ZP) = - 46 ± 3 mV, hydrodynamic diameter (DH) = 11 ± 3 nm. Analogously, the Co-MIONzyme stabilized by CMC ligand evidenced the formation of nanocrystalline substituted magnetite (CoxFe3−xO4) with uniform spherical morphology, average size = 7.0 ± 2 nm, ZP = - 47 ± 3 mV, DH = 46 ± 3 nm, and superparamagnetic behavior. When tested separately using a colorimetric assay based on a chromogenic molecule (3,3′,5,5′ tetramethylbenzidine, TMB), they demonstrated catalytic activity upon the injection of each specific substrate in the medium, i.e., glucose for GOLDzyme that behaved predominantly as oxidase-like nanomaterial, and H2O2 for Co-MIONzyme, which showed a peroxidase-like or catalase-like behavior. In addition, these nanozymes demonstrated pH-dependent and temperature-dependent catalytic activities. As a proof of concept, when combined into a single-pot reaction system, these bifunctional nanozymes confirmed integrated catalytic cascade as oxidase and peroxidase-like nanocatalysts towards the oxidation of TMB and the degradation of methylene blue (MB, ~18%) as the model dye pollutant. Based on the preliminary encouraging results of this research, it can be foreseen that the combination of nanozymes paves the way for the development of new nanoplatforms for prospective applications in water treatment and environmental remediation.

Highly efficient adsorptive and photocatalytic degradation of dye pollutants over biomass-derived carbon-supported Ag composites under visible light

In this work, biomass-derived carbon-supported (Ag/P@BC) Ag composites were prepared and used to remove pollutants (rhodamine B, RhB) under visible light irradiation. Corn straw was chosen as the source of biomass-derived carbon, and the optimal calcination temperature was set to 600 °C. When AgNO3 with an impregnation concentration of 1.0 mM 1Ag/P@BC (1Ag/P@BC) and RhB with an initial concentration of 320 mg L−1 were added, RhB removal exceeded 93%, and the removal capacity reached 1536.71 mg g−1 after adsorption and photocatalysis for 60 min. The maximum capacity of 3141.73 mg g−1 was achieved for RhB removal over 1Ag/P@BC. Although 1Ag/P@BC presents the greatest removal capacity (including adsorption–photocatalysis), 0.1Ag/P@BC had the lowest bandgap energy (2.14 eV) and the highest photocatalytic activity. Owing to its large specific surface area (1655.02 m2 g−1), 0.1Ag/P@BC had a photodegradation rate 33 times that of pure BC, as determined from kinetic studies. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM) analyses revealed that both Ag and Ag3PO4 existed in the composites and that an electronic interaction occurred between P and O, which was attributed to Ag loading. Moreover, the composites have good stability and broad applicability in acidic, neutral and alkaline conditions as well as in tap water. Based on the photoluminescence (PL), electrochemical impedance spectroscopy (EIS), electron spin resonance (ESR) and trapping experiment results, an in-depth analysis of the underlying mechanism for the adsorption–photocatalysis process was also conducted.

Combination of piezoelectric additives and ball milling for high-efficiency degradation of organic dye in solid state

The combination of piezoelectric material and ball milling leads to new frontiers in catalysis research. Here we used piezoelectric BaTiO3 nanoparticles as the additive for the degradation of dye pollutant in solid state in ball milling process. With the assistant of ppm level CuBr2 and H2O2, high degradation conversion (> 99%) of dyes can be achieved in short time (10 min). BaTiO3 nanoparticles became temporarily highly polarized particles during BM process and generated electron-hole. These particles exhibited strong reducing properties and reduced Cu(II) into the active Cu(I) species which can catalyze H2O2 to generate highly active ·O2– to enhance the dye degradation. In addition to the general applicability for different dyes and larger scales, this BaTiO3 assist BM process was deduced to be a promising powerful platform for organic pollutant treatment in solid states.

Iron/Carbon Nanofibers as Fenton Catalysts for the Electrochemical Detection and Degradation of Dye Pollutants

Iron/Carbon Nanofibers as Fenton Catalysts for the Electrochemical Detection and Degradation of Dye Pollutants

Insights into the photocatalytic activation of peroxymonosulfate by visible light over BiOBr-cyclodextrin polymer complexes for efficient degradation of dye pollutants in water

The combination of adsorption-photocatalysis and advanced oxidation processes (AOP) based on sulfate (SO4•−) for the treatment of organic pollution has the advantages of a high degradation rate, affordability, and an absence of secondary pollution. This study combined amphiphilic super-crosslinked porous cyclodextrin resin (PBCD-B-D), bismuth oxybromide (BiOBr), a composite material with dual functions of adsorption and photocatalysis, and AOP based on SO4•− for the treatment of Acid Orange 7 (AO7) in water. The combination of BiOBr/PBCD-B-D (BOP-24) with peroxymonosulfate (PMS) showed an optimal adsorption–photocatalytic effect. Compared to the 24% PBCD-B-D (BOP-24)/visible light system, the degradation efficiency of BOP-24/PMS system for AO7 is increased from 64.1% to 99.2% within shorter time (∼60 min). Moreover, the BOP-24/PMS system showed a wide range of pH application (pH = 3–11). The addition of Cl−, SO42−, and NO3− promoted the photodegradation of AO7, whereas the addition of CO32− did not. The free radical capture experiments of the BOP-24/PMS AO7 degradation system showed that •O2−, h+, •OH, and SO4•− are reactive species. The proposed BOP-24 system used adsorption and a unique cavity structure to enrich AO7 near the active site, thereby reducing the path for PMS activation. PMS also acted as an electron (e−) acceptor to promote the transfer of part of e− to PMS, thereby further improving the efficiency of carrier separation. The proposed system is an effective method to improve the degradation of pollutants and broadens the range of application of SO4•−-based AOP technology.

Cryptomelane nanorods coated with Ni ion doped Birnessite polymorphs as bifunctional efficient catalyst for the oxygen evolution reaction and degradation of organic contaminants

AbstractThe intelligent design or development of dual‐functional catalysts using non‐precious metals especially for the oxygen evolution reaction (OER) in sustainable energy systems and degradation of organic pollutants is still a difficult and a significant challenge. Furthermore, the development of these catalysts is of great importance in terms of energy security and solution of the environmental problems. To meet these requirements, herein, we describe the synthesis of a Ni‐ion doped Birnessite@Cryptomelane (Ni2+/B@Cr) hybrid structure as a bifunctional efficient catalyst for the OER in neutral media and degradation of dye pollutants. The Ni2+/B@Cr catalyst exhibited a sharp onset potential at 390 mV (vs. RHE) and achieved a current density of 1 mA cm−2 at a low ƞ of 430 mV with a Tafel slope of ~96 mV dec−1. The results of electrochemical impedance spectroscopy (EIS) studies indicated that Ni intercalation into birnessite layer and heterostructure of the hybrid electrocatalyst Ni2+/B@Cr increased the conductivity by lowering the resistance of charge transfer (Rct = 4.82 Ω) and oxygen evolution processes (ROER = 4.13 Ω). The durability assay identified Ni2+/B@Cr as stable electrocatalyst with 10% loss of activity after long‐term stability tests (10 h, under 500‐mV overpotential). In addition, the Ni2+/B@Cr achieved high (86.67 s−1 g−1) and rapid (173 s) catalytic performance for the reduction of methylene blue (MB). Overall, this paper presents a low‐cost production strategy for the design of highly efficient bifunctional catalysts, offering boosted electrocatalytic and degradation performance for water oxidation and organic dye contamination, respectively.