NaBH4 Solution Research Articles

Preparation of flame retardant and antibacterial polyacrylonitrile composites based on modified microcrystalline cellulose loaded silver nanoparticles

To improve the fire safety of polyacrylonitrile (PAN) and expand its application area, flame retardant and antibacterial PAN composite was prepared by a simple and environmentally friendly method. First, AgNO3 and NaBH4 solutions were added to the microcrystalline cellulose (MCC) aqueous suspension to prepare MCC loaded Ag nanoparticles (Ag NPs) (MCC/Ag) by in situ reduction. Then, MCC/Ag was mixed in PAN solution to prepare MCC/Ag/PAN composite, which was then phosphorylated by phytic acid (PA) to obtain flame retardant MCC/Ag/PAN composite (FR-MCC/Ag/PAN). FR-MCC/Ag/PAN could achieve self-extinguishing with limiting oxygen index (LOI) value of 36.8 %. The thermogravimetric results showed that phosphorus-containing acids accelerated the char-forming ability of FR-MCC/Ag/PAN, and the final char residue was up to 29.76 % in air atmosphere. Thermogravimetric coupled with Fourier transform infrared spectroscopy (TG-FTIR) and scanning electron microscope (SEM) showed that FR-MCC/Ag/PAN formed an expanded and dense char layer after combustion, suppressing the release of low molecular toxic gases. Moreover, FR-MCC/Ag/PAN showed favorable inhibition of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). This work proposed a novel method for developing flame retardant and antibacterial PAN material, which broadened the application field of polyacrylonitrile.

Hydrogen production from hydrolysis of NaBH4 solution over Co–Fe–B@g-C3N4/NF thin film catalyst

Hydrogen production from hydrolysis of NaBH4 solution over Co–Fe–B@g-C3N4/NF thin film catalyst

Ni–CoP catalyst for efficient and robust NaBH4 hydrolysis

Hydrogen fuel is a non-toxic and source-abundant energetic system, but for its applications in the industry, several issues related to its storage must be resolved. Compounds like NaBH4 appear as promising hydrogen sources, while can release the latter rapidly under controllable conditions with the use of heterogeneous catalyst systems. In this work, we synthesized a Ni–CoP catalyst by electrodeposition in a three-step process on carbon paper as support. The materials were characterized via SEM-EDS, XRD, and XPS techniques, while the hydrogen evolution reaction (HER) from alkaline NaBH4 solutions was tested as a batch experiment. Ni–CoP catalyst showed a high amount of H2 generated in a short time (∼550 mL in 1 min) and remained at 78 and 54% of its initial performance after respectively 100 and 300 h of a continuous hydrolysis process. Our catalyst revealed exceptional performance and stability at higher temperatures and a long process time, which have been a rare subject of investigation in other reports for NaBH4 hydrolysis in the past. This work paves a new perspective in studying catalysts for hydrogen generation from borohydrides.

Oxygen vacancies-tuned BiOBr nanosheets for accelerating CO2 and Cr(VI) photoreduction

Unsatisfactory charge separation ability and insufficient active sites are the main factors leading to low efficiency for photocatalytic CO2 conversion and Cr(VI) reduction. Constructing surface defects to accelerate charge separation is an effective strategy for promoting photocatalytic process. Herein, the oxygen vacancies modulated BiOBr nanosheets were constructed by NaBH4 solution treatment. Density functional theory calculation results found that the formed oxygen vacancies would increase the electron density around Bi atoms near the oxygen vacancies, and inhibiting recombination of the photoinduced carriers. Besides, abundant oxygen vacancies can effectively enhance the adsorption of CO2 molecules. Therefore, the BiOBr with rich oxygen vacancies (BiOBr-ROV) shows higher evolution rates for CO (15.66 μmol g−1) and CH4 (0.22 μmol g−1) under irradiation of 300 W Xe lamp for 4 h compared with pristine BiOBr nanosheets (BiOBr) and BiOBr with deficient oxygen vacancies (BiOBr-DOV). The intermediate products in the CO2 reduction process have been detected by in-situ Fourier-transform infrared spectroscopy. Besides, the photodegradation activity of Cr(VI) over BiOBr-ROV is 98.65% under 80 min of irradiation, which is higher than that of BiOBr (78.01%) and BiOBr-DOV (53.67%). The work provides a new possibility to construct photocatalysts with high-performance for solar energy conversion.

Synthesis and characterization of n-isopropylacrylamide based copolymers with silver nanoparticles

In recent years, the so-called "smart" polymers, which can systematically respond to small environmental changes, such as pH, temperature and electric field, are widely used in many fields. Researchers are particularly interested in using drugs to transport to the right place in the human body. One of the types of these smart polymers are thermosensitive polymers. Among the thermosensitive polymers, the most well-known are homo- and copolymers based on N-isopropylacrylamide. In the research work, in order to improve the properties of thermosensitive polymers, silver nanoparticles were added to the hydrogel composition. Hydrogels based on N-isopropylacrylamide and 2-hydroxyethylacrylate monomers were synthesized by radical polymerization in solution (in H2O and AgNO3 solution). While the production of silver nanoparticles is based on the redox (by NaBH4 solution) mechanism, the formation of these nanoparticles in the gel was carried out by diffusion. While the introduction of silver nanoparticles into the gel was controlled by ultraviolet spectroscopy, its inclusion in the gel was confirmed using a scanning electron microscope (SEM). Meanwhile, a hydrogel containing silver nanoparticles exhibits antibacterial properties, it was investigated using biomedical tests. It has been shown here that a hydrogel containing silver has good antibacterial properties, whereas a hydrogel without silver does not have the ability to destroy bacteria.

CO2 hydrogenation by aqueous NaBH4 solution catalyzed by zero-valent nickel supported on carbon nanofibers

In the reaction system with NaBH4 as a hydrogen donor, inhibiting the formation of hydrogen is the key to promote the efficient catalytic hydrogenation of CO2. In this study, nanoscale zero-valent nickel supported on carbon nanofibers (Ni0/CNFs) was fabricated as a catalyst for CO2 hydrogenation in aqueous NaBH4 solution. The characteristics of Ni0/CNFs were examined. By SEM, it was observed that spherical nickel nanoparticles were distributed homogeneously on the surface of strip-shaped carbon nanofibers. EDS mappings indicated that elements were evenly distributed on the catalyst, which might contribute to the uniform exposure of active sites. Via XRD, it was determined that all the diffraction peaks corresponded to the crystal face of nickel metal and that the absence of diffraction peaks of carbon nanofibers indicated that the crystallinity of the carrier was low. XPS study showed that nickel existed on the catalyst surface in two forms: zero valence metal and oxidation state. The effects of catalyst addition amount, NaBH4 concentration, NaOH dosage, stirring rate on the yield of formate and hydrogen generation rate (HGR) were investigated. By optimizing the above parameters, the concentration of formate reached 150 mmol/L and the hydrogen production rate was 10.55 mL/min. Compared with the non-catalytic conditions, the concentration of formate increased by 57 % and the HGR decreased by 78 %. Moreover, the relationship between CO2 hydrogenation and NaBH4 hydrolysis was clarified. This research could enhance comprehension of CO2 hydrogenation in aqueous NaBH4 solution and contribute to the development of CO2 capture and utilization storage technology. The significance of this study lies in clarifying the connection between CO2 hydrogenation and borohydride hydrolysis in CO2 catalytic hydrogenation technology.

Synthesis of phytogenically deposed Ag nanospheres on ZnO nanosheets for photocatalytic and catalytic applications

Current study presents the phytogenic deposition of metallic Ag nanospheres on ZnO nanosheets to produce Ag/ZnO nanostructures using Jacobaea Maritima (Silver Ragwort) plant extract and the prepared materials were tested for the photo-mineralization of methylene blue (MB) dye and catalytic reduction of nitroaromatics i.e. 4-nitroaniline (4-NA) and 4-nitrophenol (4-NP) in the presence of NaBH4 solution. The mean grain size and crystallinity of ZnO particles in Ag/ZnO nanostructures were found to be increased while the particle strain and dislocation density decreased with the elevation of Ag level in ZnO, and band gap energy value was reduced that has improved the photodegradation efficiency for MB dye from 45% to 98.60%, however, an excess amount of Ag has suppressed the photo-activity of Ag/ZnO nanostructures due to increase of band gap value and coverage of ZnO nanocrystals by Ag clusters. The catalytic reduction process indicated that the 4-NA and 4-NP were almost decolorized within 8 and 10 min, respectively. The degradation reaction rate of MB dye was enhanced by ∼7 times for Ag/ZnO nanostructures in comparison to pure ZnO nanosheets. The trapping experiments established that the •O2− and •OH radicals were the key active entities engaged in the deprivation of MB dye.

Surface reconstruction of La0.6Sr0.4Co0.8Ni0.2O3-δ perovskite nanofibers for oxygen evolution reaction

Perovskites have become promising alternatives to precious metal-catalyzed oxygen evolution reaction (OER). Herein, we report the synthesis of several perovskite nanofibers, specifically La0.6Sr0.4CoxNi1-xO3-δ (LSCN), and investigate their electrocatalytic water oxidation activity in alkaline electrolytes. La0.6Sr0.4Co0.8Ni0.2O3-δ (LSCN-0.8) is selected and immersed in an aqueous NaBH4 solution for 1 h for surface reconstruction. The perovskite nanofibers' electrocatalytic OER activity and stability are rigorously evaluated using a standard three-electrode system. Results reveal that even a slight Co substitution for Ni content within the LSCN perovskite structure has a notable impact on electrocatalytic activity. Moreover, LSCN-0.8 exhibits an overpotential of 363 mV at 20 mA cm−2 in 1 M KOH. However, significant improvement is observed after the surface reconstruction process. The optimized LSCN-0.8 (now called LSCN-2) displays the lowest OER overpotential (320 mV) under the same conditions. Furthermore, the LSCN-2 nanostructure demonstrates exceptional electrode stability, as evidenced by only a slight decrease in electrocatalytic performance during 5000 cycles of linear sweep voltammetry.

Plant axillary stem gall extract mediated bioengineered CuO nanoprisms as robust and reusable catalyst for photocatalytic and catalytic degradation of water pollutants

The current work explains the synthesis of bioengineered CuO nanoprisms using axillary stem gall extract of the Ziziphus mauritiana plant. The photocatalytic and catalytic reduction potential of bioengineered CuO nanoprisms was analyzed for the photo-mineralization of methylene blue (MB) organic dye under exposure to visible light and catalytic reduction of 4-nitrophenol (4-NP) in the presence of NaBH4 solution. The biogenic CuO nanoprisms were characterized using XRD, FTIR, FESEM, EDS, and UV–Vis. spectroscopic techniques. The mean crystallite size of CuO nanoprisms was estimated to be 34.24 nm while the band gap energy value was found to be 1.47 eV. 99.21 % of MB dye was photo-mineralized within 70 min of visible light illumination at pH=5 and 30 mg of catalyst whereas 4-NP was almost completely reduced to 4-AP within 5 min in the presence of bioengineered CuO (NPs). The data of photo-mineralization of MB dye and catalytic reduction of 4-NP well agreed to the pseudo-first-order kinetics with the rate constant values of 63.86 × 10−3 and 0.8439 min−1, respectively. The reactive species entrapping studies revealed that •OH radicals were the key active species affianced in the photo-mineralization of MB dye. Photostability and reusability tests established that only a 9 % decline in the dye degradation efficiency of bioengineered CuO was observed after the fifth cycle of reuse under visible light irradiation.

Polypyrrole regulates Active Sites in Co-based Catalyst in Direct Borohydride Fuel Cells.

Direct borohydride fuel cells (DBFCs) convert borohydride (NaBH4) chemical energy into clean electricity. However, catalytic active site deactivation in NaBH4 solution limits their performance and stability. We propose a strategy to regulate active sites in Co-based catalysts using polypyrrole modification (Co-PX catalyst) to enhance electrochemical borohydride oxidation reaction (eBOR). As an anode catalyst, the synthesized Co-PX catalyst exhibits excellent eBOR performance in DBFCs, with current density of 280 mA ⋅ cm-2 and power density of 151 mW ⋅ cm-2, nearly twice that of the unmodified catalyst. The Co-PX catalyst shows no degradation after 120-hour operation, unlike the rapidly degrading control. In-situ electrochemical attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIRS) and density functional theory (DFT) suggest that polypyrrole-modified carbon support regulate the charge distribution, increasing oxidation state and optimizing adsorption/desorption of intermediates. A possible reaction pathway is proposed. This work presents a promising strategy for efficient polymer-modulated catalysts in advanced DBFCs.

ZIF-67-derived for B-doped NiCoP hollow nanocages as efficient catalysts synergistically promoting NaBH4 hydrolysis

Designing a non-noble metal catalyst with fast charge transfer, high electron density, and abundant active sites is an effective strategy for improving the sluggish kinetics and achieving efficient hydrogen generation (HG) in the NaBH4 hydrolysis process. In view of the influence of heterogeneous elements and microstructure on the catalyst performance, ZIF-67 was initially utilized as a precursor to be converted into a mixed phase containing CoNi-LDH and ZIF-67 with identical microstructure by a controlled strategy of ion-exchange method. After further phosphitylation and immersion in NaBH4 solution, B–NiCoP/NC catalysts were obtained with the hollow nanocage structure consisting of B-doped metal phosphide (NiCoP) as well as nitrogen-doped carbon (NC). The synergistic coupling between the heteroatoms and the distinct microstructure of the optimized B–NiCoP/NC shows a high HG rate (5853.9 mL min⁻1 gcatalyst⁻1) and low activation energy (33.92 kJ mol−1), surpassing the performance of mostly reported similar catalysts. Moreover, B–NiCoP/NC exhibits a retained initial activity of 68.7 % even after six cycles. This work offered one of the referable strategies to improve the performance of non-precious metal catalysts in multiple aspects.

Hydrogen generation from NaBH4 for portable proton exchange membrane fuel cell

Sodium borohydride (NaBH4) is considered as the most potential hydrogen storage material for portable proton exchange membrane fuel cells (PEMFC) because of its high theoretical hydrogen capacity. However, the slow and poor kinetic stability of hydrogen generation from NaBH4 hydrolysis limits its application. There are two main factors influencing the kinetics stability of hydrogen generation from NaBH4. One factor is that the alkaline by-products (NaBO2) of the hydrolysis reaction can increase the pH of the solution, thus inhibiting the reaction process. It mainly happens in the NaBH4 solution hydrolysis system. Another factor is that the monotonous increase in reaction temperature leads to uncontrollable and unpredictable hydrolysis rates in the solid NaBH4 hydrolysis system. This is due to the excess heat generated from this exothermic reaction in the initial reaction of NaBH4 hydrolysis. In this perspective, we summarize the latest research progress in hydrogen generation from NaBH4 and emphasize the design principles of catalysts for hydrogen generation from NaBH4 solution and solid state NaBH4. The importance of carbon as catalyst support material for NaBH4 hydrolysis is also highlighted.

Multiple synergies on cobalt-based spinel oxide nanowires for electrocatalytic oxygen evolution

Cobalt-based spinel oxides have excellent oxygen evolution reaction (OER) activities and are cheap to produce; however, they have limited commercial applications due to their poor electrical conductivities and weak stabilities. Herein, we soaked Co3-xNixO4 nanowires in NaBH4 solutions, which endowed Co3-xNixO4 with significant oxygen vacancy content and decorated BOx motifs outside the Co3-xNixO4 nanowires. X-ray photoelectron spectroscopy and in situ Raman data suggest that these evolutions improved the conductivity, hydrophilicity, and increased active sites of the spinel oxides, which synergistically boosted their overall OER performances. This improved performance made the optimized BOx-covered Co2.1Ni0.9O4 nanowires generate a current density of 10 mA cm−2 when used for the OER at an overpotential of only 307 mV, maintaining excellent stability at 50 mA cm−2 for 24 h. This study provides a facile method for designing cobalt-based spinel oxide OER catalysts.

Hydrogen generation from hydrolysis of NaBH4 solution with efficient g-C3N4/Co–Mo–B/Ni foam catalyst

Sodium borohydride (NaBH4) is considered to be a perfect material for hydrogen production in consideration of the high hydrogen capacity. However, the catalyst with low cost and high activity is the key to achieving dehydrogenation from the hydrolysis of NaBH4 solution. In this work, we successfully synthesized g-C3N4/Co–Mo–B/Ni foam catalyst by means of chemical deposition at 298 K. The catalytic property of g-C3N4/Co–Mo–B/Ni foam for NaBH4 hydrolysis was investigated via regulating the molar ratio of Co2+ and MoO42− (nCo2+:nMoO42−). The results disclosed that the obtained g-C3N4/Co–Mo–B/Ni foam showed the optimum catalytic property when the nCo2+:nMoO42− value was 1:1. Its hydrogen generation rate (HGR) and apparent activation energy (Ea) were respectively determined to be 9957.7 mL min−1·g−1 and 52.6 kJ mol−1 under visible light irradiation, which has obviously exceeded the performance under darkness (HGR = 8372.7 mL min−1·g−1, Ea = 55.8 kJ mol−1). It might attribute to the emergence of Mo2C during the preparation process which attracted the photoelectron transfer on g-C3N4, thus promoting the photocatalytic hydrolytic process of NaBH4 solution. Moreover, the smaller grain size and synergistic effect between multiple components could be another reason for heightening the catalytic dehydrogenation property of g-C3N4/Co–Mo–B/Ni foam catalyst.

Hydrogen evolution from NaBH4 solution using Cr-doped Ni–B metallic catalyst deposited on rice husk via electroless plating

Hydrogen evolution through the catalytic hydrolysis of NaBH4 by transition metals holds great promise for sustainable green energy production. In this study, we presented an electroless process for synthesizing Cr-doped Ni–B catalysts supported on rice husks. The kinetics and thermodynamics of the NaBH4 hydrolysis were systematically investigated. The crystallography confirmed the formation of Ni and Cr connected to B. 0.8 wt% Cr also significantly impacted the Ni–B activity and enhanced the hydrogen generation rate from 394 to 801 ml min−1.g−1 at 32 °C. Based on Kinetics, NaBH4 hydrolysis by Ni–B–Cr0.8 needs an activation energy of 50.64 kJ mol−1 and follows zero- and first-order kinetics concerning NaBH4 and catalyst weight. After five cycles reusability, the Ni–B–Cr0.8 revealed excellent stability and kept its activity almost constant in basic NaBH4 solution.

Co–Fe–B@g-C3N4/Cu sheet for promoting hydrolytic dehydrogenation from the hydrolysis of NaBH4 solution

In this work, Co–Fe–B@g-C3N4/Cu sheet has been successfully prepared via chemical deposition process. When the weight of g-C3N4 is optimized to 0.005 g, the as-obtained catalyst with unique surface structure shows an improved catalytic performance toward the hydrolysis of NaBH4 solution. Under visible light irradiation, HGR of 8343 mL·min−1·g−1 and Ea of 48.4 kJ·mol−1 are synchronously accomplished. The results indicate that the catalytic activity has surpassed most of reported non-precious metal and even precious metal catalysts. It demonstrates that this work offers a viable method for manufacturing non-noble metal catalysts with high catalytic property toward the hydrolysis of NaBH4 solution.

Quantitative Contribution of Oxygen Vacancy Defects to Arsenate Immobilization on Hematite.

Hematite is a common iron oxide in natural environments, which has been observed to influence the transport and fate of arsenate by its association with hematite. Although oxygen vacancies were demonstrated to exist in hematite, their contributions to the arsenate immobilization have not been quantified. In this study, hematite samples with tunable oxygen vacancy defect (OVD) concentrations were synthesized by treating defect-free hematite using different NaBH4 solutions. The vacancy defects were characterized by positron annihilation lifetime spectroscopy, Doppler broadening of annihilation radiation, extended X-ray absorption fine structure (EXAFS), thermogravimetric mass spectrometry (TG-MS), electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS). The results revealed that oxygen vacancy was the primary defect type existing on the hematite surface. TG-MS combined with EPR analysis allowed quantification of OVD concentrations in hematite. Batch experiments revealed that OVDs had a positive effect on arsenate adsorption, which could be quantitatively described by a linear relationship between the OVD concentration (Cdef, mmol m-2) and the enhanced arsenate adsorption amount caused by defects (ΔQm, μmol m-2) (ΔQm = 20.94 Cdef, R2 = 0.9813). NH3-diffuse reflectance infrared Fourier transform (NH3-DRIFT) analysis and density functional theory (DFT) calculations demonstrated that OVDs in hematite were beneficial to the improvement in adsorption strength of surface-active sites, thus considerably promoting the immobilization of arsenate.

Activation of ferrocene-based coordination compounds for oxygen evolution and the application in zinc-air battery

Rational reconstruction of oxygen evolution reaction (OER) pre-catalysts and the performance index is crucial but still challenging. Herein, a coordination compound composed by ferrocenedicarboxylic acid and Co2+ was prepared, which was then treated by NaBH4 solution for the rational reconstruction. The electrochemical activation of the treated product results in the generation of oxyhydroxides with unique microstructure acting as the catalytic active phase, which exhibits excellent electrocatalytic activity with a low overpotential of 256 mV for 10 mA cm−2 towards OER and a half-wave potential of 0.69 V (vs RHE) for oxygen reduction (ORR). Ru species was then loaded on the treated product to further improve the catalytic activity for oxygen reduction. The annealed product (Ru-CoFe/C) presents a core-shell structure with carbon layer on the surface. The product presents an increased half-wave potential of 0.744 V (vs RHE) for ORR with the OER/ORR overpotential gap of 0.776 V for 10 and 1 mA cm−2, respectively, showing the bifunctional catalytic activity. Ru species with small size improves the catalytic activity for ORR; the carbon shell provides the high stability. A Zn-air battery was then fabricated with the Ru-CoFe/C catalyst, which delivers a high power density of 88 mW cm−2 and a large specific capacity of 709 mAh g−1, as well as an excellent cycling stability over 65 h, surpassing commercial Pt/C + RuO2 based counterpart, demonstrating its feasibility in the field of renewable electronic devices. This work affords valuable guidelines for the application of ferrocene-based materials in OER and for the exploring of advanced bifunctional ORR/OER catalysts in rational construction of high-quality Zn-air batteries.

Copper Nanoparticles Supported on ZIF-8: Comparison of Cu(II) Reduction Processes and Application as Benzyl Alcohol Oxidation Catalysts.

We report the synthesis of a stable heterogeneous catalyst based on copper metal nanoparticles with oxidized surface supported on ZIF-8 for the oxidation of benzyl alcohol under mild temperature and using air as a sustainable oxygen source as well as for the implementation of the tandem "one-pot" catalytic system allowing the sustainable synthesis of benzylidene malononitrile. The influence of the reduction process applied to form the nanoparticle upon the catalyst texture and its performances was extensively examined. After ZIF-8 impregnation with a copper chloride precursor, the reduction of cupric ions into Cu0 nanoparticles was carried out according to two procedures: (i) by soaking the solid into a solution of NaBH4 and (ii) by submitting it to a flow of gaseous H2 at 340 °C. The in-depth physicochemical characterization and comparison of the resulting two types of Cu/ZIF-8 materials reveal significant differences: the reduction with NaBH4 led to the formation of 16 nm sized Cu0 nanoparticles (NP) mainly localized on the external surface of the ZIF-8 crystals together with ZnO nanocrystallites, while the reduction under H2 flow resulted in Cu0 nanoparticles with a mean size of 22 nm embedded within the bulk of ZIF-8 crystals. More, when NaBH4 was used to reduce cupric ions, ZnO particles were highlighted by high-resolution microcospy imaging. Formation of ZnO impurities was confirmed by the photoluminescence analysis of ZIF-8 after NaBH4 treatment. In contrast, ZnO was not detected on ZIF-8 treated with H2. Both types of Cu0 NPs supported on ZIF-8 were found to be active as catalysts toward the aerobic oxidation of benzyl alcohol under moderate temperature (T < 80 °C) and using air as a sustainable O2 source. Benzaldehyde yield of 66% and selectivity superior to 90% were obtained with the Cu/ZIF-8 catalyst prepared under H2 flow after 24 h under these conditions. The same material could be recycled 5 times without loss of activity, unlike the catalysts synthesized with NaBH4, as a result of the leaching of the surface copper NPs over the consecutive catalytic cycles. Finally, the most stable catalyst was successfully implemented in a tandem "one-pot" catalytic system associating benzyl alcohol oxidation and Knoevenagel condensation to synthesize benzylidene malononitrile.

Novel facile synthesis and room-temperature sintering of copper nanowires for solution-processed transparent conductive films

Copper nanowires (Cu NWs) are considered as the potential alternative material for indium tin oxide (ITO) which is widely used in various photoelectric devices. However, the effective and full solution-processed technology for Cu NWs transparent conductive films (TCFs) with excellent performance is lacking. Here, a facile “heterogeneous-self reduction” approach was proposed for Cu NWs synthesis with the yield as high as 62.2% using nether reductant nor crystal seed. Copper glycine heated with hexadecyltrimethylammonium chloride and oleylamine, decomposed continuously to release Cu atoms, which were nucleated and grown anisotropically into Cu NWs with aspect ratio > 1000. The “pickling-chemical sintering” solution-process was applied to form the Cu NWs TCFs using the synthesized Cu NWs. Oleylamine on the surface of purified Cu NWs was removed by pickling with acetic acid solution. After coating on PET film, the surface oxide of Cu NWs could be reduced to Cu (0) by NaBH4 solution, and the sintering of Cu NWs can be realized simultaneously. The Cu NWs TCF with a sheet resistance of 34.7 Ω sq–1 at a transmittance of 91.1% exhibits the excellent performance in capacitive sensing. This work is expected to promote the full-solution preparing of Cu NWs TCFs.